61 results on '"Zhicong Shi"'
Search Results
2. A review of deep learning approach to predicting the state of health and state of charge of lithium-ion batteries
- Author
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Kai Luo, Xiang Chen, Huiru Zheng, and Zhicong Shi
- Subjects
Fuel Technology ,Electrochemistry ,Energy Engineering and Power Technology ,Energy (miscellaneous) - Published
- 2022
3. A simple feature extraction method for estimating the whole life cycle state of health of lithium-ion batteries using transformer-based neural network
- Author
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Kai Luo, Huiru Zheng, and Zhicong Shi
- Subjects
Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry - Published
- 2023
4. Fluorine Grafted Gel Polymer Electrolyte by in Situ Construction for High-Voltage Lithium Metal Batteries
- Author
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Junqiao Huang, Zhichuan Shen, Stuart J. Robertson, Yuhan Lin, Junli Zhu, Kun Yang, Yating Wang, Minhua Shao, and Zhicong Shi
- Published
- 2023
5. Tailoring the microstructure of Mg-Al-Sn-RE alloy via friction stir processing and the impact on its electrochemical discharge behaviour as the anode for Mg-air battery
- Author
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Jingjing Liu, Hao Hu, Tianqi Wu, Jinpeng Chen, Xusheng Yang, Naiguang Wang, and Zhicong Shi
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Mechanics of Materials ,Metals and Alloys - Published
- 2022
6. Effect of copper substitution on the electrochemical properties of high entropy layered oxides cathode materials for sodium-ion batteries
- Author
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Honghao Deng, Liying Liu, and Zhicong Shi
- Subjects
Mechanics of Materials ,Mechanical Engineering ,General Materials Science ,Condensed Matter Physics - Published
- 2023
7. Superorganophilic MAF-6/PP Composite Separator Boosts Lithium Metal Anode Performance
- Author
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Mouping Fan, Gui-De Lin, Wenli Wu, Zhicong Shi, Xi Ke, Liying Liu, Yifeng Cheng, Yan-Tong Xu, and Yuanmao Chen
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Materials science ,Yield (engineering) ,Chemical engineering ,Renewable Energy, Sustainability and the Environment ,Plating ,Composite number ,Energy Engineering and Power Technology ,General Materials Science ,Porosity ,Faraday efficiency ,Ion ,Separator (electricity) ,Anode - Abstract
Practical application of lithium metal anodes in high-energy rechargeable batteries is impeded by the issue of Li dendrite growth. Herein, an exceptional hydrophobic MAF-6 material is utilized to modify polypropylene (PP) separator to yield a superorganophilic MAF-6/PP composite separator. Owing to a combination of superorganophilicity with three-dimensional ordered porosity, the MAF-6/PP achieves a Li ion transference number of 0.78. Homogeneous and dense Li plating behaviors are present in cells with MAF-6/PP which can afford uniform Li ion flux. The MAF-6/PP enables Li|Cu cells to run steadily for over 350 cycles at 0.5 mA cm−2-1 mAh cm−2 with an average coulombic efficiency (CE) of 98.8%, symmetric Li|Li cells to work stably for 2200 h without short-circuit at 0.5 mA cm−2-1 mAh cm−2, and Li|LiFePO4 cells to retain a reversible capacity of 102.4 mAh g−1 after 1500 cycles at 1C with a capacity retention of 73.2% and a CE of 99.9%.
- Published
- 2021
8. In-situ construction of tetraethylene glycol diacrylate based gel polymer electrolyte for long lifespan lithium metal batteries
- Author
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Yuhan Lin, Jiahong Chen, Junli Zhu, Jiawei Zhong, Kun Yang, Honghao Deng, Junqiao Huang, Zhichuan Shen, and Zhicong Shi
- Subjects
General Physics and Astronomy ,Surfaces and Interfaces ,General Chemistry ,Condensed Matter Physics ,Surfaces, Coatings and Films - Published
- 2023
9. SiO2 nanofiber composite gel polymer electrolyte by in-situ polymerization for stable Li metal batteries
- Author
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Zhichuan Shen, Jiawei Zhong, Jiahong Chen, Wenhao Xie, Kun Yang, Yuhan Lin, Jinbiao Chen, and Zhicong Shi
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General Chemistry - Published
- 2023
10. Mn-doped nickel–iron phosphide heterointerface nanoflowers for efficient alkaline freshwater/seawater splitting at high current densities
- Author
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Yuanzhi Luo, Pan Wang, Gaixia Zhang, Sisi Wu, Zhangsen Chen, Hariprasad Ranganathan, Shuhui Sun, and Zhicong Shi
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History ,Polymers and Plastics ,General Chemical Engineering ,Environmental Chemistry ,General Chemistry ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2023
11. Li2Se as cathode additive to prolong the next generation high energy lithium-ion batteries
- Author
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Yanpeng Fu, Yu Xie, Linyong Zeng, and Zhicong Shi
- Subjects
General Physics and Astronomy ,Surfaces and Interfaces ,General Chemistry ,Condensed Matter Physics ,Surfaces, Coatings and Films - Published
- 2023
12. Enhancing ORR/OER active sites through lattice distortion of Fe-enriched FeNi3 intermetallic nanoparticles doped N-doped carbon for high-performance rechargeable Zn-air battery
- Author
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Seonghee Kim, Zhicong Shi, Jun Kang, Kandasamy Prabakar, Rajmohan Rajendiran, Guanzhou Li, Oi Lun Li, Kai Chen, and Chanyoung Jeong
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Battery (electricity) ,Materials science ,Inorganic chemistry ,Oxygen evolution ,chemistry.chemical_element ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrocatalyst ,01 natural sciences ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Catalysis ,Biomaterials ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,Transition metal ,chemistry ,0210 nano-technology ,Bifunctional ,Carbon - Abstract
Low-cost, high-activity, non-precious metal electrocatalysts are needed to enhance the bifunctional oxygen activities of rechargeable Zn-Air batteries. In this study, a Fe-enriched FeNi3 inter-metallic nanoparticle/nitrogen-doped carbon (Fe-enriched-FeNi3/NC) electrocatalyst was designed and prepared using a facile method based on plasma engineering. The excess Fe-ions in the Fe-enriched FeNi3 nanoparticles led to a high degree of lattice distortion that produced abundant oxygen-active sites. The electrocatalyst exhibited excellent oxygen evolution reaction (OER) activity as well as favorable oxygen reduction reaction (ORR) activity in an alkaline electrolyte. In addition, the electrocatalyst revealed a lower potential difference (ΔE = 0.80 V vs. RHE) in a bifunctional oxygen reaction compared to that of the benchmark 20 wt% Pt/C + Ir/C (ΔE = 0.84 V vs. RHE), and most of the reported FeNi3 alloy-doped carbon catalysts. Based on DFT calculations, the lattice distortion in Fe-enriched-FeNi3/NC promoted a higher density of active electrons around the Fermi level. Owing to its great bifunctional oxygen activities, Fe-enriched FeNi3/NC was applied as an ORR/OER catalyst in the air cathode in a homemade zinc-air battery and exhibited an excellent discharge–charge voltage gap (0.89 V), peak power density (89 mW/cm2), and high specific capacity of 734 mAh/g at 20 mA/cm2, which outperformed the benchmark 20 wt% Pt/C + Ir/C electrocatalyst. In summary, this research provides a novel strategy to enhance the OER/ORR activities of transition metal-based alloys through lattice distortion defects. In addition, it provides a new pathway for achieving noble metal-free air cathode materials for the next generation Zn-air battery.
- Published
- 2021
13. Boosting the electrochemical performance of 3D composite lithium metal anodes through synergistic structure and interface engineering
- Author
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Yifeng Cheng, Yanqing Lai, Zhicong Shi, Xinyue Huang, Wenli Wu, Guoxiu Wang, Mouping Fan, Yicheng Zhong, Zhimin Ao, Yaohua Liang, Xi Ke, and Yuanmao Chen
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Materials science ,Renewable Energy, Sustainability and the Environment ,Nanoporous ,Composite number ,Polyacrylonitrile ,Energy Engineering and Power Technology ,02 engineering and technology ,Overpotential ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Anode ,chemistry.chemical_compound ,Chemical engineering ,chemistry ,Electrode ,General Materials Science ,0210 nano-technology ,Faraday efficiency - Abstract
Construction of three-dimensional (3D) composite lithium metal anodes (LMAs) based on Li melt-infusion into a 3D porous scaffold has been demonstrated to be effective for solving the issue of the considerable relative volume change of LMAs during Li plating/stripping. However, little attention has been paid to controllable regulation of the structure and interface of 3D composite LMAs. In this study, 3D composite LMAs, namely Li–AuLi3@CF electrodes, are firstly fabricated by infusion of molten Li into carbon fiber (CF) paper modified with nanoporous gold (NPG) which is converted to AuLi3 after infusion. We herein demonstrate a synergistic structure and interface engineering strategy realized by a simple and effective pre-stripping protocol to initially expose a portion of the 3D AuLi3@CF scaffold to create “PS-Li-AuLi3@CF” electrodes, which greatly boosted the electrochemical performance. Symmetrical Li|Li cells with PS-Li-AuLi3@CF electrodes show an overpotential of 111 mV after cycling at a current density of 0.5 mA cm−2 for 1800 h. Additionally, Li|LiFePO4 (LFP) and Li|sulfurized polyacrylonitrile (SPAN) full cells with PS-Li-AuLi3@CF electrodes exhibit a high capacity retention of 96.1% with a Coulombic efficiency (CE) of 99.2% after 1000 cycles at 5C, and a capacity retention of 70.6% with a CE of 99.8% after 1000 cycles at 2C, respectively. This work provides a simple and highly effective method for engineering the structure and interface of 3D composite LMAs to boost their electrochemical performance for high-energy-density rechargeable lithium metal batteries (LMBs).
- Published
- 2020
14. Ag nanoparticles embedded in sodiophilic carbon host achieving high-power Na metal batteries
- Author
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Kaiji Lin, Jinbiao Chen, Chenhan Lin, Liying Liu, Gaixia Zhang, Shuhui Sun, and Zhicong Shi
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General Chemical Engineering ,Environmental Chemistry ,General Chemistry ,Industrial and Manufacturing Engineering - Published
- 2023
15. Surface engineering of commercial Ni foams for stable Li metal anodes
- Author
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Xi Ke, Ping Liu, Yuanmao Chen, Haodong Liu, Lihui Ou, Yanqing Lai, Zaiping Guo, Yaohua Liang, Yifeng Cheng, Wenli Wu, and Zhicong Shi
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Materials science ,Renewable Energy, Sustainability and the Environment ,Nucleation ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,Metal foam ,Surface engineering ,Current collector ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Anode ,chemistry ,Specific surface area ,General Materials Science ,Lithium ,Composite material ,0210 nano-technology ,Faraday efficiency - Abstract
The short life span of lithium metal anodes (LMAs) due to dendrite growth and low coulombic efficiency (CE) has been regarded as the bottleneck in developing next-generation high-energy-density lithium metal based secondary batteries. Employing three-dimensional (3D) current collectors is one approach to reduce the effective current density and delay dendrite growth. Commercial Ni foam, in spite of its high electronic conductivity and 3D topology, has not been considered for this application due to its low specific surface area and lithiophobic nature. In this study, we develop a surface engineering strategy to uniformly coat lithiophilic AuLi3 particles on Ni foam skeletons through lithiation of electrodeposited gold nanoparticles. In comparison with the bare Ni foam, the AuLi3@Ni foam is more lithiophilic, significantly lowering the nucleation energy barrier and enhancing the uniformity for Li deposition. Such a structure results in effective suppression of Li dendrite growth in the void space of the foam. As a result, the AuLi3@Ni foam current collector based LMAs can run for 740 h without cell failure in a symmetric cell. Furthermore, the Li-AuLi3@Ni foam|LiFePO4 full cell shows an excellent capacity retention of 43.8% with a high CE of 99.2% at 1C for 500 cycles. This work further illustrates the critical importance of surface lithiophilicity in guiding lithium cycling and suggests engineering the skeleton surface of commercial metal foam current collectors is important to improve 3D structured LMAs.
- Published
- 2019
16. Constructing LiF-rich artificial SEI at a two-dimensional copper net current collector in anode-free lithium metal batteries
- Author
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Kaichen Yu, Jinbiao Chen, Xintai xie, Kaiji Lin, Jie Li, and Zhicong Shi
- Subjects
General Physics and Astronomy ,Surfaces and Interfaces ,General Chemistry ,Condensed Matter Physics ,Surfaces, Coatings and Films - Published
- 2022
17. Building a stable artificial solid electrolyte interphase on lithium metal anodes toward long-life Li–O2 batteries
- Author
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Jinbiao Chen, Dongdong Li, Kaiji Lin, Xi Ke, Yifeng Cheng, and Zhicong Shi
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Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry - Published
- 2022
18. Cu2P7-black P-MWCNTs (CuP5/MWCNTs): An advanced hybrid anode for Li/Na-ion batteries
- Author
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Jun Liao, Yunyong Li, Pengfei Shen, Jiale Yu, Zhicong Shi, Wenwu Li, Xinwei Li, Haiyan Zhang, and Yuchen Liu
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Materials science ,Mechanical Engineering ,Composite number ,Volume variation ,Mechanical milling ,02 engineering and technology ,Carbon nanotube ,Electron ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,law.invention ,Layered structure ,Anode ,Chemical engineering ,Mechanics of Materials ,law ,General Materials Science ,0210 nano-technology ,Faraday efficiency - Abstract
Cu2P7-black P-MWCNT (CuP5/MWCNT) is prepared by a facile mechanical milling method. When used as anodes for Li/Na-ion batteries, the composite delivers high comprehensive performances: initial Coulombic efficiency up to 90/84%, 1455/1170 mA h g−1 after 200 cycles, and 960/580 mA h g−1 at 5 A g−1 for Li/Na-ion batteries, respectively. The performances can be attributed to the hybridized strategy of two-dimension layered structure of Cu2P7, black P, and one-dimension multiwall carbon nanotubes. The former offers a fast transport channel for Li/Na-ions and the latter provides for fast transport of electrons and accommodates the volume variation during cycling. In addition, the synergistic effect among different phases also leads to enhanced performance. The integrated strategy of one-dimensional and two-dimensional advantages can excite more research interest in the energy-storage field.
- Published
- 2019
19. Synthesis of Co Ni1-S2 electrode material with a greatly enhanced electrochemical performance for supercapacitors by in-situ solid-state transformation
- Author
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Xiaoxiang Wang, Liwei Su, Teng Wang, Zhicong Shi, Tuquabo Tesfamichael, Feng Yu, and Hongxia Wang
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In situ ,Supercapacitor ,Electrode material ,Materials science ,Mechanical Engineering ,Metals and Alloys ,Solid-state ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Chemical engineering ,Transition metal ,Mechanics of Materials ,Electrical resistivity and conductivity ,Materials Chemistry ,0210 nano-technology - Abstract
Transition metal sulfides such as Ni–Co sulfides are promising electrode materials for supercapacitors owing to their advantageous electrical conductivity. Current approaches for the synthesis of Ni–Co sulfides normally involve wet chemical sulfurization. In this work, we demonstrate a facile method for synthesizing CoxNi1-xS2 (0
- Published
- 2019
20. Ternary Cu2P7/CuP2/C composite: A high-performance multi-phase anode material for Li/Na-ion batteries endowed by heterointerfaces
- Author
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Zhenghui Li, Xinwei Li, Wenwu Li, Yunyong Li, Jun Liao, Pengfei Shen, Zhicong Shi, Xia Lia, Haiyan Zhang, and Na Li
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Materials science ,Band gap ,Mechanical Engineering ,Composite number ,Metals and Alloys ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Anode ,Transition metal ,Chemical engineering ,Mechanics of Materials ,Phase (matter) ,Materials Chemistry ,0210 nano-technology ,Ternary operation ,Current density - Abstract
Phosphides are promising anode candidates profiting from their relatively smaller voltage hysteresis which thus are promising to be high energy efficiency and power capabilities for secondary batteries, compared with the corresponding fluorides, oxides and sulfides. Herein we for the first time synthesized ternary Cu 2 P 7 /CuP 2 /graphite composite by a facile ball milling method. When initiated as anodes for Li-ion batteries, the as-synthesized ternary composite provides 1415 mA h g −1 after 100 cycles and 684 mA h g −1 at a high current density of 10 A g −1 . When initiated as anodes for Na-ion batteries, the as-synthesized ternary composite provides 1254 mA h g −1 after 100 cycles and 200 mA h g −1 at a high current density of 5 A g −1 . These electrochemical performances are comparable or even surpass the P/C, CuP 2 /C and other transition metal phosphides reported before. The enhanced performances can be attributed to the high P concentration, layered structure and small band gap of the Cu 2 P 7 phase and the heterointerface between these phases, which not only assists electron and Li-ion transportation and but also creates more active sites endowed by interfacial coupling and positive electrochemical synergistic effect. The multiphase design strategy can further excite more research interest in the energy-storage field.
- Published
- 2019
21. Layered GeP-black P(Ge2P3): An advanced binary-phase anode for Li/Na-storage
- Author
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Zhicong Shi, Yunyong Li, Xinwei Li, Haiyan Zhang, Pengfei Shen, Wenwu Li, and Liangcai Yang
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010302 applied physics ,Materials science ,Process Chemistry and Technology ,Composite number ,Binary number ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Anode ,Layered structure ,Chemical engineering ,Phase (matter) ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,0210 nano-technology ,Current density ,Ball mill ,Faraday efficiency - Abstract
Various P-Ge compounds including GeP5 and GeP3 can be easily synthesized by a direct ball milling method while GeP can not. Herein, we successfully synthesize binary-phase Ge2P3 composite which derived from layered GeP and black P. When applied as anodes for Li-ion batteries, the as-synthesized binary-phase composite delivers a large reversible capacity of 1605 mA h g−1 with a high initial Coulombic efficiency of 89%, retains 1380 mA h g−1 after 100 cycles and even achieves 920 mA h g−1 at a current density of at 5 A g−1. Also, for sodium-storage it shows a reversible capacity of 970 mA h g−1 with an initial Coulombic efficiency of 88% and retains 890 mA h g−1 after 100 cycles. The performance can be attributed to the following merits: the binary Li/Na-storage components host more Li/Na ions, the layered structure favors Li/Na-ion transportation and the abundant heterointerfaces increase the amount of active sites.
- Published
- 2019
22. MoS2 nanosheets with expanded interlayer spacing for rechargeable aqueous Zn-ion batteries
- Author
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Jun Liu, Longtao Ma, Zijie Tang, Hongfei Li, Chunyi Zhi, Qi Yang, Zhicong Shi, Funian Mo, Guojin Liang, and Zhuoxin Liu
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chemistry.chemical_classification ,Battery (electricity) ,Materials science ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,02 engineering and technology ,Polymer ,Electrolyte ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Energy storage ,Cathode ,0104 chemical sciences ,law.invention ,chemistry ,Chemical engineering ,law ,Electrode ,General Materials Science ,0210 nano-technology - Abstract
Recently, rechargeable Zn-ion batteries (ZIBs) have attracted incremental attention as prospective energy storage devices for grid-scale applications and flexible devices, due to their low cost, environmental benignity, high safety and unique properties of the Zn metal. However, the sustained development of high-performance ZIBs is hindered by the limited availability of cathode materials. Here, for the first time, we demonstrate MoS2 with expanded inter-layer spacing (E-MoS2) can be a promising cathode candidate for rechargeable and flexible ZIBs. By X-ray diffraction (XRD) and Raman studies, a reversible Zn2+ ion intercalation/deintercalation mechanism was revealed. The E-MoS2 electrode delivers a specific capacity of 202.6 mA h g−1 at 0.1 A g−1, a desirable energy density of 148.2 Wh kg−1 and good cycle stability with a capacity retention ratio of 98.6% over 600 cycles. By using the newly-developed starch/ polyacrylamide (PAM) based polymer electrolyte with high zinc ion conductivity, a quasi-solid Zn/E-MoS2 battery was developed, which exhibits decent electrochemical performance even under various heavy deformations, holding great potential for applications in future flexible and wearable devices.
- Published
- 2019
23. Mixed-conducting interlayer boosting the electrochemical performance of Ni-rich layered oxide cathode materials for lithium ion batteries
- Author
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Kaiji Lin, Zhicong Shi, Liying Liu, Jun Liu, Qinglu Fan, Haodong Liu, Ke An, Shaodian Yang, Yong Yang, Chaoyu Hong, Yan Chen, Ping Liu, and Rui Liu
- Subjects
Materials science ,Renewable Energy, Sustainability and the Environment ,Graphene ,Energy Engineering and Power Technology ,Ionic bonding ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Ion ,law.invention ,Conductor ,Coating ,Chemical engineering ,law ,engineering ,Thermal stability ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,0210 nano-technology ,Oxide cathode - Abstract
In this work, a unique artificial interface combing characteristics of both high ionic and electronic conductivities has been successfully constructed at the surface of Ni-rich LiNi0·8Co0·1Mn0·1O2 (NCM811). The ionic conductor layer is fabricated through reacting H3PO4 with the lithium residuals on the surface of NCM811 to form Li3PO4. The interface with high electronic conductivity is constructed by attaching graphene fragments to the NCM811 spherical particles. Due to the synergistic effect of the Li3PO4 coating layer and the graphene network, the modified sample (GN-LPO-NCM811) exhibits high capacity retention of 94.3% after 150 cycles at 0.5C between 3.0 and 4.3 V, while the pristine material shows a much lower retention of only 88.1%. In addition, the GN-LPO-NCM811 also presents improved cycling stability at elevated temperature of 55 °C. Even at an extremely high rate of 10C, the GN-LPO-NCM811 still remains 70% of its original capacity, while the pristine NCM811 only delivers 50% of the capacity. The stable cycling performance of GN-LPO-NCM811 is demonstrated in a full cell with graphite anode at ambient temperatures. Importantly, the thermal stability of the modified samples is also greatly enhanced. This study provides an effective method to improve the electrochemical performance of LiNi0·8Co0·1Mn0·1O2.
- Published
- 2019
24. Nanocomposites LiMnxFe1-xPO4/C synthesized via freeze drying assisted sol-gel routine and their magnetic and electrochemical properties
- Author
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Jian Lai, Shulei Chou, Dan Liu, Yanyan Cui, Zhicong Shi, Zujie Cao, Jun Liu, Guoxun Zeng, Qinghai Li, Liying Liu, and Xi Ke
- Subjects
Nanocomposite ,Materials science ,Mechanical Engineering ,Diffusion ,Doping ,Metals and Alloys ,Analytical chemistry ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Freeze-drying ,chemistry ,Mechanics of Materials ,Impurity ,Materials Chemistry ,0210 nano-technology ,Carbon ,Sol-gel - Abstract
Nanocomposites LiMnxFe1-xPO4/C (x = 1, 5/6, 2/3, 1/2) are synthesized by a sol-gel route combined with freeze drying. Fe2+ substituted samples coated by high-ordered carbon have the same olivine structure of LiMnPO4/C but reduced cell volumes. Fe2+ substituting greatly influences magnetic characteristics of LiMnPO4/C and slight amounts of Fe2P impurity in Fe2+ doped samples are verified by magnetic tests. Fe2+ substituted samples exhibit much better electrochemical properties. Among them, LiMn1/2Fe1/2PO4/C displays the best rate capacity and cyclic stability. Its initial discharge capacity reaches 140.1 mAh g−1 and remains at 132.5 mAh g−1 after 100 cycles at 2C, remarkably higher than those of LiMnPO4/C. The superior electrochemical performances are mainly attributed to small charge-transfer impedance, fast Li+ diffusion, residual carbon and existence of Fe2P with excellent electronic conductivity.
- Published
- 2019
25. New layered chalcogenides (Na0.5OH)Fe0.5Cu0.5X (X = Se, S): Synthesis, structure, magnetic and electrochemical properties
- Author
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Xin Tan, Yuting Tang, Yurong Ren, Xiaofang Lai, Minhao Guo, Mingling Xiao, Ruiwen Wu, Zhicong Shi, Jun Liu, and Jikang Jian
- Subjects
Mechanics of Materials ,Materials Chemistry ,General Materials Science - Published
- 2022
26. Mathematical modeling of proton-conducting electrochemical cells for ethylene production from ethane
- Author
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Libin Lei, Yongzhen Ou, Ruiming Qiu, Wenchao Lian, Yingyu Mo, Jihao Zhang, Zhicong Shi, Jianping Liu, Chao Wang, and Ying Chen
- Subjects
Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry - Published
- 2022
27. Effect of crystallographic orientation on the discharge and corrosion behaviour of AP65 magnesium alloy anodes
- Author
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Zhicong Shi, Wenhui Xiong, Mu Yangchang, Qi Li, Naiguang Wang, and Junchang Zhang
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Battery (electricity) ,Materials science ,020209 energy ,General Chemical Engineering ,Doping ,02 engineering and technology ,General Chemistry ,021001 nanoscience & nanotechnology ,Microstructure ,Corrosion ,Anode ,Crystallography ,0202 electrical engineering, electronic engineering, information engineering ,General Materials Science ,Seawater ,Magnesium alloy ,0210 nano-technology ,Dissolution - Abstract
AP65 doped with different elements are rolled into the anode plates for Mg-air battery and higher-power seawater activated battery. The discharge and corrosion behaviour of their cross- section surfaces (CS) and rolling surfaces (RS) is systematically studied and the results show that the RS consisting of (0001) crystallographic planes have lower corrosion rates and inhibit the self- discharge at 180 mA cm−2, whereas the CS with ( 11 2 ¯ 0 ) and ( 10 1 ¯ 0 ) planes provide higher anodic efficiencies at 10 mA cm−2 and possess stronger discharge activity. Furthermore, the dissolution mechanisms of different surfaces are also elucidated based on microstructure characterization and electrochemical response.
- Published
- 2018
28. Knitting a sweater with UV-induced in situ polymerization of poly(pyrrole-co-citral nitrile) on Ni-rich layer oxide cathode materials for lithium ion batteries
- Author
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Qinglu Fan, Shaodian Yang, Liying Liu, Kaiji Lin, Zhiling Liu, and Zhicong Shi
- Subjects
Materials science ,Nitrile ,Renewable Energy, Sustainability and the Environment ,Oxide ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Electrolyte ,engineering.material ,Electrochemistry ,Cathode ,law.invention ,chemistry.chemical_compound ,Coating ,chemistry ,Chemical engineering ,law ,engineering ,Lithium ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,In situ polymerization - Abstract
Ni-rich layered oxide (LiNi0.8Co0.1Mn0.1O2) has become popular commercial cathode material for lithium ion batteries, due to its high working potential and high specific capacity. It is still a challenge, however, to maintain the structure and performance under extreme conditions, such as at high charging cutoff (≥4.5 V), high temperature (≥60 °C) and higher charge-discharge rate (≥3 C). Herein, Poly (pyrrole-co-citral nitrile) (PPC) optimized interfacial layer is designed and constructed on the surface of LiNi0.8Co0.1Mn0.1O2 by an in situ photopolymerization self-assembly technology. The sweater-like co-polymer coating provides an integral protection from side reaction, particle rupture and irreversible phase transition during cycling under the extreme conditions. Furthermore, the delocalized π bonds and cross-linked network structure of the co-polymer coating ensure the efficient and stable interface between electrolyte and electrode. This work offers a novel and useful strategy to enhance the electrochemical performance of Ni-rich cathode materials for high-energy lithium ion batteries at extreme conditions.
- Published
- 2022
29. 3D hexapod-shaped Co-ZIFs-S derived co nanoparticles embedded into nitrogen and sulfur co-doped carbon decorated with ruthenium nanoparticles as efficient catalyst for rechargeable lithium oxygen battery
- Author
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Lijuan Chen, Dongdong Li, Minhua Shao, Zhicong Shi, Zhichuan Shen, Qian Zhang, and Kumar Siddharth
- Subjects
Battery (electricity) ,Materials science ,Renewable Energy, Sustainability and the Environment ,chemistry.chemical_element ,Nanoparticle ,Overpotential ,Electrochemistry ,Ruthenium ,Catalysis ,chemistry ,Chemical engineering ,General Materials Science ,Lithium ,Electrical and Electronic Engineering ,Carbon - Abstract
Rechargeable lithium oxygen batteries (LOBs) are one of the most promising energy storage systems by virtue of their high energy density and environmental amiability. However, the development of LOBs is still hindered by some critical issues. Herein, 3D hexapod-shaped Co-ZIFs-thiourea/dimethyl sulfoxide (H-Co-ZIFs-S) derived Co nanoparticles embedded into nitrogen and sulfur co-doped carbon (H-Co-NSC) are developed, and then low content of ruthenium nanoparticles are decorated on the surface to obtain Ru/H-Co-NSC as efficient catalyst for LOBs. The Ru/H-Co-NSC catalysts exhibits unique structure and catalytic properties, such as accommodating the insoluble discharge product Li2O2, promoting the transportation of ions/O2, enhancing the electronic conduction, demonstrating excellent OER/ORR kinetics as well. In addition, the Ru-decorated nanoparticles could effectively suppress some side-reactions caused by the exposed carbon of H-Co-NSC in LOBs. First-principles Density functional theory (DFT) calculations reveal the cooperative effect of multiple active sites in Ru/H-Co-NSC can effectively promote the ORR/OER kinetics in LOBs. Therefore, the LOBs with Ru/H-Co-NSC cathode provide a positive catalytic capacity with low overpotential, large specific capacities, long cycle life and superior reversibility. Our work may pave the way to design more advanced catalysts for metal-air batteries with superior electrochemical performance.
- Published
- 2022
30. CoFe nanoparticles dispersed in Co/Fe-N-C support with meso- and macroporous structures as the high-performance catalyst boosting the oxygen reduction reaction for Al/Mg-air batteries
- Author
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Jinpeng Chen, Tao Huang, Jingsha Li, Jingjing Liu, Qiong Cai, Jianwen Liang, Naiguang Wang, and Zhicong Shi
- Subjects
Materials science ,Renewable Energy, Sustainability and the Environment ,Carbonization ,Metal ions in aqueous solution ,Energy Engineering and Power Technology ,Nanoparticle ,Ethylenediaminetetraacetic acid ,Catalysis ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Chelation ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Melamine ,Pyrolysis - Abstract
Constructing the M-N-C (M = Fe, Co, etc.) with meso- and macroporous structures is an effective strategy for designing the high-performance catalysts towards oxygen reduction reaction (ORR). However, these structures can hardly be achieved via the pyrolysis of classic metal-organic frameworks. Herein, we prepare the CoFe nanoparticles with surface oxides dispersed in Co/Fe-N-C support via carbonizing melamine and ethylenediaminetetraacetic acid chelated with metal ions. This hybrid exhibits high proportions of meso- and macropores along with excellent ORR catalytic activity, as evidenced by the half-wave potentials of 0.91 and 0.61 V (vs. RHE) in 0.1 M KOH and 3.5 wt% NaCl, respectively. The Al/Mg-air batteries with this catalyst exhibit superior performance to those employing Pt/C, primarily derived from the enlarged pore diameters and the exposed ORR active sites substantially enhancing the air-electrode performance. Our study provides an avenue to broaden the pore sizes of M-N-C for boosting its ORR catalytic activity.
- Published
- 2022
31. Tri-functional coating to enhance the capacity retention of LiNi 0.5 Mn 1.5 O 4 for high power lithium ion battery
- Author
-
Zhicong Shi, Yifeng Cheng, Naiguang Wang, Qinglu Fan, Lingyu Zhang, Jun Liu, Zaiping Guo, Liying Liu, and Xi Ke
- Subjects
Battery (electricity) ,Materials science ,chemistry.chemical_element ,02 engineering and technology ,engineering.material ,010402 general chemistry ,Electrochemistry ,01 natural sciences ,Lithium-ion battery ,Ion ,law.invention ,Coating ,law ,Forensic engineering ,General Materials Science ,Mechanical Engineering ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Cathode ,0104 chemical sciences ,Surface coating ,Chemical engineering ,chemistry ,Mechanics of Materials ,engineering ,Lithium ,0210 nano-technology - Abstract
LiNi0.5Mn1.5O4 is a promising cathode material for high power lithium ion batteries (LIBs) for electric vehicles (EVs) and hybrid electric vehicles (HEVs). For the first time we design a tri-functional coating to improve the cycling performance of LiNi0.5Mn1.5O4. With the designed BiPO4 coating, the capacity retentions of LiNi0.5Mn1.5O4 are largely improved from 84.3% to 93.6% at 0.5 C after 50 cycles and from 80.6% to 96.2% at 10 C after 100 cycles. The tri-functional coating reduces the charge transfer resistance of LiNi0.5Mn1.5O4 cathode and plays a critical role in enhancing the electrochemical performance and lifetime. This strategy provides a new way to modify electrode materials to elevate the performance of LIBs.
- Published
- 2018
32. Towards wearable electronic devices: A quasi-solid-state aqueous lithium-ion battery with outstanding stability, flexibility, safety and breathability
- Author
-
Yang Huang, Zijie Tang, Jun Liu, Zifeng Wang, Zhicong Shi, Minshen Zhu, Zengxia Pei, Chunyi Zhi, Zhuoxin Liu, Yan Huang, and Hongfei Li
- Subjects
Battery (electricity) ,Flexibility (engineering) ,Materials science ,Renewable Energy, Sustainability and the Environment ,business.industry ,Nanotechnology ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Energy storage ,Lithium-ion battery ,0104 chemical sciences ,Coating ,engineering ,General Materials Science ,State (computer science) ,Electrical and Electronic Engineering ,0210 nano-technology ,Quasi-solid ,business ,Wearable technology - Abstract
High-performance energy storage devices are in urgent need due to the fast development of wearable electronics, while the challenge of achieving outstanding flexibility has not been properly addressed yet, let alone the safety, another critical issue determines their practicability. Herein, we report a quasi-solid-state aqueous rechargeable lithium-ion battery (ARLIB) based on carbon cloth substrates and PVA-LiNO3 gel polymer electrolyte (GPE). Thanks to the protective PPy coating layer on LiV3O8 and the use of solid GPE, the as-assembled ARLIB exhibits a good cycling stability of 98.7% and 79.8% capacity retention after 100 and 500 cycles, respectively. It also demonstrates exceptional flexibility to sustain various deformations including bending, squeezing, twisting and folding because of its solid-state design. Moreover, the ARLIB can be tailored into any desired shapes, and even be punched penetrative holes, exhibiting excellent safety. Thus, the creation of numerous tiny through-holes across the whole ARLIB body is testified feasible, and a designed breathability catering to the demand of comfortability in wearable devices is subsequently realized. Obviously, our study offers a promising strategy to construct flexible energy storage device with outstanding stability, flexibility, safety and breathability towards various wearable electronics.
- Published
- 2018
33. Nano-sized cathode material LiMn0.5Fe0.5PO4/C synthesized via improved sol-gel routine and its magnetic and electrochemical properties
- Author
-
Guiyuan Chen, Jun Liu, Bingtian Du, Shulei Chou, Yanyan Cui, Zaiping Guo, Zhicong Shi, Haiyan Zhang, Liying Liu, and Xi Ke
- Subjects
Materials science ,General Chemical Engineering ,Inorganic chemistry ,Nanoparticle ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,Microstructure ,01 natural sciences ,Cathode ,0104 chemical sciences ,law.invention ,Chemical engineering ,Impurity ,law ,Nanorod ,0210 nano-technology ,Sol-gel ,Solid solution - Abstract
Cathode materials LiMn 0.5 Fe 0.5 PO 4 /C and LiMnPO 4 /C were synthesized by a high-energy ball-milling assisted sol-gel method. The LiMn 0.5 Fe 0.5 PO 4 consists of nanorods and nanoparticles homogeneously wrapped with highly ordering carbon. The increased Neel-temperature and decreased effective magnetic moment of LiMn 0.5 Fe 0.5 PO 4 /C revealed the microstructure differences from LiMnPO 4 /C. Meanwhile, tiny amount of ferromagnetic impurities is detected in LiMn 0.5 Fe 0.5 PO 4 /C by magnetic tests. The synergetic effects of Fe substitution and carbon coating remarkably improve rate capacity and cyclic stability of LiMn 0.5 Fe 0.5 PO 4 /C. This solid solution delivers initial discharge capacities of 128.6 mAh g −1 and 116.3 mAh g −1 and capacity retentions of 93.5% and 90.3% after 100 cycles at 1C and 2C respectively, significantly better than LiMnPO 4 /C.
- Published
- 2017
34. Self-supported Zn3P2 nanowires-assembly bundles grafted on Ti foil as an advanced integrated electrodes for lithium/sodium ion batteries with high performances
- Author
-
Jiale Yu, Zaiping Guo, Wenwu Li, Zhicong Shi, Xinwei Li, and Haiyan Zhang
- Subjects
Materials science ,Lithium vanadium phosphate battery ,Mechanical Engineering ,Sodium ,Inorganic chemistry ,Metals and Alloys ,chemistry.chemical_element ,02 engineering and technology ,Chemical vapor deposition ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Anode ,Ion ,chemistry ,Mechanics of Materials ,Materials Chemistry ,Lithium ,0210 nano-technology ,High-resolution transmission electron microscopy ,FOIL method - Abstract
Well-aligned Zn 3 P 2 nanowires-assembly bundles/Ti foil integrated anodes were for the first time successfully synthesized by a facile chemical vapor deposition. When directly applied as anodes for lithium/sodium ion batteries, they show excellent lithium/sodium storage performance especially in high-rate capability. Specifically, applied as anode material for lithium ion batteries, it showed 1100 mA h g −1 after 100 cycles and an ultrahigh rate performance with 300 mA h g −1 even at 40 A g −1 ; as anode material for sodium ion batteries, it was, for the first time, investigated and delivered a high initial specific capacity of 1120 mA h g −1 , and excellent rate capability with 280 mA h g −1 at 5 A g −1 , demonstrating that Zn 3 P 2 nanowires-assembly bundles/Ti foil integrated anodes are a promising anode candidate for lithium/sodium ion batteries. The Ex-situ XRD and HRTEM were for the first time, carried out to investigate the sodium storage mechanism of Zn 3 P 2 . Such superior lithium/sodium storage performances can be attributed to this well-aligned Zn 3 P 2 nanowires-assembly bundles structure, which not only mitigates the volume expansion of Zn 3 P 2 during cycling but also provides the direct electron transfer to ensure high-rate performances.
- Published
- 2017
35. AZ31 magnesium alloy with ultrafine grains as the anode for Mg-air battery
- Author
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Songyuan Zheng, Xu Sheng Yang, Zhicong Shi, Yixiang Huang, Weipeng Xie, Qiong Cai, Naiguang Wang, and Jingjing Liu
- Subjects
Battery (electricity) ,Materials science ,General Chemical Engineering ,Metallurgy ,Alloy ,Spark plasma sintering ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Microstructure ,01 natural sciences ,Grain size ,0104 chemical sciences ,Anode ,Electrochemistry ,engineering ,Magnesium alloy ,0210 nano-technology ,Ball mill - Abstract
Fabricating the magnesium alloy with fine grains, low dislocation density, and weak grain orientation is of crucial importance to enhance its anode performance for primary aqueous battery. However, this structure mode can hardly be realized for bulk magnesium alloy via the conventional approaches such as plastic working. Herein, we construct an AZ31 magnesium alloy with ultrafine grains (667.28 ± 291.35 nm) by using the spark plasma sintering of the alloy powder that has been treated via high-energy ball milling. This alloy exhibits weak grain orientation and its dislocation density is not increased compared to the precursor alloy. Benefiting from the unique microstructure, the modified AZ31 displays significantly more active behaviour with enhanced capacity during the discharge of Mg-air battery, as compared with the precursor AZ31 that has the grain size of 472.89 ± 154.31 μm. Furthermore, the impact of ultrafine grains on the discharge behaviour is also analysed based on microstructure characterization and electrochemical response.
- Published
- 2021
36. Walnut shell – Derived activated carbon: Synthesis and its application in the sulfur cathode for lithium–sulfur batteries
- Author
-
Liying Liu, Liu Bin, Jun Liu, Hu Liecong, Zhicong Shi, Zaiping Guo, Wang Chengwen, Xi Ke, and Huang Zongxiong
- Subjects
Potassium hydroxide ,Materials science ,Carbonization ,Mechanical Engineering ,Inorganic chemistry ,Metals and Alloys ,chemistry.chemical_element ,Lithium–sulfur battery ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Sulfur ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Mechanics of Materials ,Specific surface area ,Materials Chemistry ,medicine ,0210 nano-technology ,Mesoporous material ,Carbon ,Activated carbon ,medicine.drug - Abstract
Biomass walnut shell was used to prepare activated carbon (AC) through a carbonization treatment and an activation procedure with potassium hydroxide (KOH). AC showed hierarchical pores: 0.6 nm micropores, 2.7 nm mesopores and macropores with average diameter of 50 nm, providing a large specific surface area of 2318 m 2 g −1 . This highly porous AC was tested as a host material to encapsulate sulfur via a vapor phase infusion process. The developed AC-S electrode showed a high initial specific capacity of 1350 mAh g −1 and good capacity retention over 100 cycles at 0.1 C for lithium–sulfur battery.
- Published
- 2017
37. Improved rate and cycle performance of nano-sized 5LiFePO 4 ·Li 3 V 2 (PO 4 ) 3 /C via high-energy ball milling assisted carbothermal reduction
- Author
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Wenxue Xiao, Zhicong Shi, Shulei Chou, Hua Chen, Yanyan Cui, Guoxun Zeng, Haiyan Zhang, Yiming Chen, Mingzhe Chen, Xi Ke, Liying Liu, and Zaiping Guo
- Subjects
Materials science ,Dopant ,Mechanical Engineering ,Composite number ,Doping ,Metals and Alloys ,Analytical chemistry ,Mineralogy ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Lithium-ion battery ,0104 chemical sciences ,Mechanics of Materials ,Carbothermic reaction ,Materials Chemistry ,0210 nano-technology ,Ball mill ,Monoclinic crystal system - Abstract
Nano-sized 5LiFePO 4 ·Li 3 V 2 (PO 4 ) 3 /C composite was synthesized via improved carbothermal reduction combined high-energy ball milling. XRD results reveal that the composite is composed of olivine LiFePO 4 and monoclinic Li 3 V 2 (PO 4 ) 3 phases. Meanwhile small amounts of V 3+ and Fe 2+ as dopants entered into the lattices of LiFePO 4 and Li 3 V 2 (PO 4 ) 3 , respectively. Trace amounts of Fe 2 O 3 in LiFePO 4 /C and Fe 2 P in 5LiFePO 4 ·Li 3 V 2 (PO 4 ) 3 /C were identified and quantified by magnetic tests. And magnetic parameters of 5LiFePO 4 ·Li 3 V 2 (PO 4 ) 3 /C are significantly different from LiFePO 4 /C. The 5LiFePO 4 ·Li 3 V 2 (PO 4 ) 3 /C presents initial discharge specific capacities of 145.2 mAh g −1 and 133.9 mAh g −1 and no capacity attenuations after 50 cycles can be observed at 2C and 5C respectively. Compared with LiFePO 4 /C, its rate capability and cyclic stability are both enhanced greatly. The mutual doping, synergistical effect of LiFePO 4 and Li 3 V 2 (PO 4 ) 3 and contribution of Fe 2 P are mainly responsible for the excellent electrochemical performances.
- Published
- 2017
38. Gel formation and transformation of Moxidectin during the anti-solvent crystallization
- Author
-
Leping Dang, Lin Hao, Zhicong Shi, Hongyuan Wei, and Mengqian Zhang
- Subjects
Polarized light microscopy ,Materials science ,Hydrogen bond ,Analytical chemistry ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,law.invention ,Inorganic Chemistry ,Crystal ,Differential scanning calorimetry ,law ,Materials Chemistry ,Molecule ,Fourier transform infrared spectroscopy ,Crystallization ,0210 nano-technology ,Powder diffraction - Abstract
The gel formation and transformation to crystal of moxidectin (Form I) during the anti-solvent crystallization was studied in this paper. Several characterization techniques were used to monitor and identify this process, including online and offline instruments, such as X-ray powder diffraction (PXRD), polarizing microscope(POM), differential scanning calorimetry (DSC), focused beam reflectance measurement (FBRM) and On-line Forier transform infrared (FTIR). The results demonstrated that tiny crystal nucleus could be found after certain amount water was added into the solution, and then the tiny crystal nucleuses served as gelators and induced the system to form gel through the hydrogen bonds between moxidectin and water molecules. Finally, the gel would transform to form I due to the instability of gel.
- Published
- 2017
39. Rational synthesis of MnO2@CMK/S composite as cathode materials for lithium–sulfur batteries
- Author
-
Liying Liu, Zhicong Shi, Zaiping Guo, Wang Chengwen, Haiyan Zhang, Xi Ke, Jun Liu, and Liu Bin
- Subjects
Materials science ,Composite number ,Inorganic chemistry ,chemistry.chemical_element ,Lithium–sulfur battery ,02 engineering and technology ,engineering.material ,010402 general chemistry ,01 natural sciences ,Energy storage ,law.invention ,Coating ,law ,General Materials Science ,Mechanical Engineering ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Sulfur ,Cathode ,0104 chemical sciences ,Chemical engineering ,chemistry ,Mechanics of Materials ,Chemisorption ,engineering ,0210 nano-technology ,Carbon - Abstract
Lithium–sulfur batteries with a high energy density are promising energy storage devices. The realization of lithium–sulfur batteries is mainly hindered by the dissolution of the intermediate polysulfides. In the present work, a new physical and chemical entrapment method of the polysulfides has been proposed, which used CMK-3 as the carbon scaffolds and a MnO 2 coating layer for chemisorption. Such a bi-functional framework provides efficient trapping for the polysulfides, achieving a reversible capacity of 600 mAh g −1 after 100 cycles at 0.1 C with a 73.4 wt% sulfur loading in the composite.
- Published
- 2017
40. Improvement in capacity retention of cathode material for high power density lithium ion batteries: The route of surface coating
- Author
-
Yunyong Li, Zhuozhuo Zhao, Jun Liu, Xi Ke, Qihui Wu, Ying Chen, Lingyu Zhang, Zhicong Shi, Liying Liu, Zaiping Guo, and Haiyan Zhang
- Subjects
Materials science ,Mechanical Engineering ,Spinel ,chemistry.chemical_element ,02 engineering and technology ,Building and Construction ,Electrolyte ,Management, Monitoring, Policy and Law ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Lithium-ion battery ,0104 chemical sciences ,Surface coating ,General Energy ,Chemical engineering ,chemistry ,Coating ,Forensic engineering ,engineering ,Particle ,Lithium ,0210 nano-technology - Abstract
Using electrical vehicles instead of traditional ones is very important for reducing fossil oil consumption and carbon emissions. Spinel LiNi0.5Mn1.5O4 is considered as a promising cathode material for advanced lithium ion batteries owing to its high power density. Nevertheless, it suffers badly from the interfacial reactions with the electrolyte at high operation potential, which degrades its electrochemical performance. The strategy of the present study is to prevent direct contact between LiNi0.5Mn1.5O4 and the electrolyte by using a surface coating in order to reduce solid electrolyte interfacial reactions and consequently enhance its cycling performance. The experimental results indicated that as-prepared LiNi0.5Mn1.5O4 sintered at 900 °C possessed the highest initial specific capacity of 132.4 mA h·g−1 at 0.2 C rate, with 81.0% initial capacity retention after 50 cycles. Coating AlF3 on the particle surfaces of LiNi0.5Mn1.5O4 using a modified solid-state method can improve its electrochemical properties by enhancing its initial specific capacity from 104.6 to 109.1 mA h·g−1 and increasing its capacity retention from 80.6 to 92.1% at the 10 C rate after 100 cycles.
- Published
- 2017
41. Pseudocapacitive Transparent/Flexible Supercapacitor based on Graphene wrapped Ni(OH) 2 Nanosheet Transparent Film Produced using Scalable Bio-inspired Methods
- Author
-
Li Ruijian, Yiming Chen, Zhicong Shi, Yunyong Li, Haiyan Zhang, Xuankai Huang, and Na Li
- Subjects
Supercapacitor ,Materials science ,Graphene membrane ,Nanostructure ,Graphene ,General Chemical Engineering ,Areal capacitance ,Nanotechnology ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,law.invention ,law ,Electrode ,Electrochemistry ,0210 nano-technology ,Cvd graphene ,Nanosheet - Abstract
High specific-capacity pseudocapacitive transition-metal-hydroxide (TMH) materials are desirable for future high performance transparent supercapacitors, but have been rarely reported previously. The successful synthesis of TMH materials with desired nanostructures is a key factor for their transparency. Here, Ni(OH)2 nanosheet transparent film (NNS-TF) was developed simply through a gas-liquid diffusion method. The nanostructures were enwrapped in graphene shells (NNS@Gr-TF) for using as transparent electrodes. The unique encapsulation structures build up rapid three-dimensional electron and ion transport pathways together with the underlying ITO layer. The specific areal capacitance (18.9 mF/cm2 at 0.1 mA/cm2) was greatly improved, at least a thousand times higher than the reported value for transparent devices based on planer CVD graphene, and ten times as that for 3D micro-structured graphene membrane.
- Published
- 2016
42. δ-MnO2 nanowires supported on carbon black with oxygen-containing functional groups for enhanced electrocatalytic oxygen reduction reaction
- Author
-
Li Wenping, Zhicong Shi, Qiong Cai, Naiguang Wang, Yixiang Huang, Jianwen Liang, Mingchang Hu, and Chen Yuanye
- Subjects
Materials science ,Mechanical Engineering ,Kinetics ,Metals and Alloys ,Nanowire ,chemistry.chemical_element ,02 engineering and technology ,Carbon black ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Microstructure ,01 natural sciences ,Oxygen ,0104 chemical sciences ,Catalysis ,Crystal ,chemistry ,Chemical engineering ,Mechanics of Materials ,Materials Chemistry ,0210 nano-technology ,Power density - Abstract
The δ-MnO2 nanowires are fabricated and chemically bonded with the carbon black that has appropriate amounts of oxygen containing functional groups. These short δ-MnO2 nanowires are (006) crystal plane-dominated and the hybrid (δ-MnO2 nanowires/carbon black) exhibits enhanced electrocatalytic activity towards oxygen reduction reaction (ORR). The half-wave potential (0.82 V (vs. RHE)) and limiting-current density (5.47 mA cm−2) of the hybrid in alkaline medium are close to those of 20 wt% Pt/C, respectively. The hybrid is used as cathodic catalyst in a Zn-air battery cell, which displays a peak power density of 138.0 mW cm−2, comparable to that using Pt/C catalyst (142.8 mW cm−2). This excellent catalytic performance is attributed to the unique microstructure of the hybrid that accelerates the kinetics of ORR. Furthermore, the ORR catalytic mechanism is also systematically analysed based on the microstructural characterization and electrochemical response.
- Published
- 2020
43. Constructing effective TiO2 nano-coating for high-voltage Ni-rich cathode materials for lithium ion batteries by precise kinetic control
- Author
-
Guan Shoujie, Jie Li, Kaiji Lin, Fan Qinglu, Jun Liu, Shuai Feng, Jinbiao Chen, Zhicong Shi, Shaodian Yang, and Liying Liu
- Subjects
cathode ,Lithium-ion batteries ,Materials science ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,Electrolyte ,engineering.material ,nano-coating ,010402 general chemistry ,01 natural sciences ,Mn ,law.invention ,Co ,Coating ,Dynamics control ,law ,TiO ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Composite material ,High-resolution transmission electron microscopy ,Renewable Energy, Sustainability and the Environment ,High voltage ,021001 nanoscience & nanotechnology ,0.1 ,Cathode ,0104 chemical sciences ,Dielectric spectroscopy ,chemistry ,0.8 ,Electrode ,LiNi ,engineering ,Lithium ,0210 nano-technology - Abstract
In order to improve the performance of Ni-rich cathode materials for lithium-ion batteries at high cut-off voltage, a highly effective TiO2 nano-coating is constructed on the surface of LiNi0.8Co0.1Mn0.1O2 by precisely controlling the hydrolytic dynamics of Ti4+, and the effect of this coating layer is systematically studied, especially at high upper cut-off voltage. The continuous TiO2 nano-coating layer provides a complete protection for LiNi0.8Co0.1Mn0.1O2 particles and enhances the reversibility of the phase transition between hexagonal and hexagonal (H2→H3) during cycling, which guarantees an excellent cycling stability under high upper cut-off voltage up to 4.5 V. Electrochemical impedance spectroscopy results confirm a stable interface between electrolyte and electrode and the fast kinetics at the surface of the modified sample. High Resolution Transmission Electron Microscopy (HR-TEM) measurement for the cycled electrodes further verifies the slight structure decay of the coated sample comparing with the pristine one. Thus, the modified sample presents excellent cycling stability with capacity retention of 72.2% after 500 cycles and 63.4% after 1000 cycles with the upper cut-off voltage of 4.5 V and 4.3 V, respectively. This work provides a universal method to prepare conformal TiO2 nano-coating and also offer guidance to properly evaluate the function of a coating.
- Published
- 2020
44. Enhanced ionic conductivity of Li3.5Si0.5P0.5O4 with addition of lithium borate
- Author
-
Jinxiao Mi, Yong Yang, Dawei Wang, Matthew J. McDonald, Riqiang Fu, Guiming Zhong, Yixiao Li, Zhengliang Gong, and Zhicong Shi
- Subjects
Lithium borate ,Chemistry ,Inorganic chemistry ,chemistry.chemical_element ,General Chemistry ,Electrolyte ,Condensed Matter Physics ,Lithium-ion battery ,chemistry.chemical_compound ,Solid-state nuclear magnetic resonance ,Ionic conductivity ,General Materials Science ,Grain boundary ,Boron ,Polarization (electrochemistry) - Abstract
A series of lithium borate added electrolyte compounds, xLi3BO3-(1−x)Li3.5Si0.5P0.5O4 (0 ≤ x ≤ 0.2), are synthesized and characterized. This so-called LISICON electrolyte system is analyzed by using X-ray diffraction (XRD), scanning electron microscopy (SEM), solid state nuclear magnetic resonance (ss-NMR), electrochemical impedance spectra (EIS), and direct current (DC) polarization methods. From 11B MAS NMR spectra, it is demonstrated that a small fraction of boron exists in the form of BO4, while its majority settles at grain boundaries in the form of BO3, indicating that lithium borate glasses play a role as sintering assistant. This prominently increases the relative density of samples, and is beneficial to the ionic conductivity. Further results show that the electrical conduction of lithium borate added LISICONs is dominated by Li+ ions, with a transference number of tLi+ ≥ 0.996 and a corresponding ionic conductivity of about 6.5 × 10−6 S cm−1 at room temperature, almost two times that of pristine Li3.5Si0.5P0.5O4.
- Published
- 2015
45. Flexible free-standing sulfurized polyacrylonitrile electrode for stable Li/Na storage
- Author
-
Xi Ke, Zaiping Guo, Naiguang Wang, Jun Liu, Liying Liu, Zexi Huang, Xinyue Huang, Zhicong Shi, Jianping Liu, and Yong Yang
- Subjects
Materials science ,General Chemical Engineering ,Polyacrylonitrile ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Cathode ,0104 chemical sciences ,law.invention ,symbols.namesake ,chemistry.chemical_compound ,X-ray photoelectron spectroscopy ,chemistry ,Chemical engineering ,law ,Nanofiber ,Electrode ,Electrochemistry ,symbols ,Lithium ,0210 nano-technology ,Science, technology and society ,Raman spectroscopy - Abstract
Flexible lithium sulfur batteries are promising power sources for the next generation wearable electronics, due to their high energy density and low cost. Here, we demonstrate a metal current collector-free, binder-free, flexible sulfurized polyacrylonitrile film electrode with hollow tubular nanofibers (H-SPAN), which is fabricated via coaxial electrospinning and a simple heat treatment. The all-fibrous films H-SPAN not only provides three-dimensional continuous electron and ion transport paths, but also suppresses the shuttle effect, contributing to better redox kinetics, cycling performance, and flexibility. The H-SPAN film electrode delivers a high specific lithium storage capacity of 1250 mAh g−1sulfur or 514.75 mAh g−1electrode at 0.1C with stable cycling over 300 cycles. Additionally, when H-SPAN is applied as a cathode for room temperature Na–S batteries, it also exhibits superb capacity and cycling stability (717 mAh g−1sulfur or 295.2 mAh g−1electrode at 0.1C after 200 cycles). The working mechanism of H-SPAN is well elucidated by ex situ Raman spectroscopy and ex situ X-ray Photoelectron Spectroscopy (XPS). The excellent flexibility of the H-SPAN film electrode lends itself well to potential applications in wearable electronic devices.
- Published
- 2020
46. Facile one-pot synthesis of low cost MnO2 nanosheet/Super P Li composites with high oxygen reduction reaction activity for Zn-air batteries
- Author
-
Huang Youlun, Guanzhou Li, Huaiyu Shao, Oi Lun Li, Jianping Liu, Yong Yang, Gu Xiefang, Naiguang Wang, Huang Zongxiong, and Zhicong Shi
- Subjects
Battery (electricity) ,Materials science ,Renewable Energy, Sustainability and the Environment ,One-pot synthesis ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,Manganese ,Carbon black ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrocatalyst ,01 natural sciences ,Redox ,0104 chemical sciences ,Catalysis ,chemistry ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Composite material ,0210 nano-technology ,Nanosheet - Abstract
Facile green and scalable synthesis of low-cost nonprecious metal electrocatalysts which favor a four-electron pathway for the oxygen reduction reaction (ORR) are in great need for high-performance metal-air batteries. Herein, an ultrasonication-assisted synthesis method of preparing MnO2 nanosheets anchored on carbon black (MnO2/Super P Li) ORR catalyst is proposed. Three kinds of MnO2 nanostructures can be controlled and conformably deposited on Super P Li backbone. The MnO2/Super P Li composites facilitates a four-electron ORR process and demonstrates superior stability than the benchmark catalyst Pt/C in alkaline solutions. Moreover, the Zn-air battery using one of the MnO2/Super P Li catalysts displays a specific capacity of 705mA h g−1 and the voltage platform is almost unchanged after discharge for 180 h. The high ORR activity of the hybrid catalyst can be attributed to the MnO2 nanosheets uniformly grown on the Super P Li three dimensional (3D) framework and the appropriate Mn(Ⅲ)/Mn(Ⅳ) of the MnO2/Super P Li composite which can magically catalyze the reduction of hydrogen peroxide. Due to the high ORR activity and the superior stability, low cost MnO2/Super P Li catalysts lends itself well to potential applications in renewable energy conversion devices.
- Published
- 2020
47. Facile fabrication of graphene/nickel oxide composite with superior supercapacitance performance by using alcohols-reduced graphene as substrate
- Author
-
Yiming Chen, Zhicong Shi, Haiyan Zhang, Xingfa Xu, Peng Deng, Zhikun Huang, Yunyong Li, and Zhenghui Li
- Subjects
Materials science ,Graphene ,Scanning electron microscope ,Mechanical Engineering ,Nickel oxide ,Graphene foam ,Non-blocking I/O ,Metals and Alloys ,Nanotechnology ,law.invention ,symbols.namesake ,Chemical engineering ,Mechanics of Materials ,law ,Materials Chemistry ,symbols ,Raman spectroscopy ,Graphene nanoribbons ,Graphene oxide paper - Abstract
Graphene/nickel oxide composite (G/NiO) was synthesized through a facile hydrothermal method and subsequently microwave thermal treatment by using alcohols-reduced graphene as substrate. The as-prepared G/NiO was characterized by X-ray diffraction, Raman spectra, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscope and transmission electron microscope. The results indicate that the graphene oxide has been successfully reduced to graphene, and NiO nanoparticles are homogeneous anchored on the surface of graphene, forming a globule-on-sheet structure. The loading content of NiO nanoparticles anchoring on the surface of graphene nanosheets can be controlled by adjusting the hydrothermal temperature. The G/NiO displays superior electrochemical performance with a specific capacitance of 530 F g −1 at 1 A g −1 in 2 M of NaOH. After 5000 cycles, the supercapacitor still maintains a specific capacitance of 490 F g −1 (92% retention of the initial capacity), exhibiting excellent cycling stability.
- Published
- 2015
48. A three-dimensional LiFePO4/carbon nanotubes/graphene composite as a cathode material for lithium-ion batteries with superior high-rate performance
- Author
-
Yiming Chen, Peng Deng, Chuchun Zheng, Yipeng Ye, Zhicong Shi, Wenguang Wang, Haiyan Zhang, and Xingling Lei
- Subjects
Materials science ,Graphene ,Carbon nanofiber ,Mechanical Engineering ,Lithium iron phosphate ,Graphene foam ,Metals and Alloys ,chemistry.chemical_element ,Nanotechnology ,Carbon nanotube ,Lithium-ion battery ,law.invention ,chemistry.chemical_compound ,chemistry ,Potential applications of carbon nanotubes ,Chemical engineering ,Mechanics of Materials ,law ,Materials Chemistry ,Lithium - Abstract
A three-dimensional lithium iron phosphate (LiFePO4)/carbon nanotubes (CNTs)/graphene composite was successfully synthesized via solid-state reaction. The LiFePO4/carbon nanotubes/graphene (LFP–CNT–G) composite used as Li-ions battery cathode material exhibits superior high-rate capability and favorable charge–discharge cycle performance under relative high current density compared with that of LiFePO4/carbon nanotubes (LFP–CNT) composite and LiFePO4/graphene (LFP–G) composite. Graphene nanosheets and CNTs construct 3D conducting networks are favor for faster electron transfer, higher Li-ions diffusion coefficient and lower resistance during the Li-ions reversible reaction. The synergistic effect of graphene nanosheets and CNTs improves the rate capability and cycling stability of LiFePO4-based cathodes. The LFP–CNT–G electrode shows reversible capacity of 168.9 mA h g−1 at 0.2 C and 115.8 mA h g−1 at 20 C. The electrochemical impedance spectroscopy demonstrate that the LFP–CNT–G electrode has the smallest charge-transfer resistance, indicating that the fast electron transfer from the electrolyte to the LFP–CNT–G active materials in the Li-ions intercalation/deintercalation reactions owing to the three-dimensional networks of graphene and carbon nanotubes.
- Published
- 2015
49. Wrought Mg-Al-Pb-RE alloy strips as the anodes for Mg-air batteries
- Author
-
Guanzhou Li, Yixiang Huang, Naiguang Wang, Li Wenping, Gang Wu, Mingchang Hu, and Zhicong Shi
- Subjects
Materials science ,Alloy ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,STRIPS ,engineering.material ,010402 general chemistry ,Electrochemistry ,01 natural sciences ,law.invention ,law ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Magnesium alloy ,Renewable Energy, Sustainability and the Environment ,Magnesium ,Metallurgy ,021001 nanoscience & nanotechnology ,Microstructure ,0104 chemical sciences ,Anode ,chemistry ,engineering ,Extrusion ,0210 nano-technology - Abstract
Wrought Mg-Al-Pb-RE strips of different thicknesses are synthesized via extrusion and used as the anodes in Mg-air batteries. We find that, compared to other Mg-Al-Pb-RE samples, the 5 mm-thick strip exhibits greater stability and higher discharge voltage plateaus for long time (10 h). Its anodic efficiency at 10 mA cm −2 reaches 64.1%, which is even higher than pure magnesium and AZ31 magnesium alloy. The outstanding performance of the 5 mm-thick Mg-Al-Pb-RE anode strip is attributed to its unique microstructure favourable for anodic dissolution. Furthermore, the correlations between microstructure features and electrochemical performance for the wrought Mg-Al-Pb-RE strips are also systematically defined.
- Published
- 2019
50. Lithiophobic-lithiophilic composite architecture through co-deposition technology toward high-performance lithium metal batteries
- Author
-
Zhicong Shi, Xinyue Huang, Zaiping Guo, Yuanmao Chen, Yifeng Cheng, and Xi Ke
- Subjects
Materials science ,Renewable Energy, Sustainability and the Environment ,Nanoporous ,Composite number ,Nucleation ,02 engineering and technology ,Overpotential ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,7. Clean energy ,01 natural sciences ,Cathode ,0104 chemical sciences ,law.invention ,Anode ,Metal ,Chemical engineering ,law ,visual_art ,visual_art.visual_art_medium ,General Materials Science ,Electrical and Electronic Engineering ,0210 nano-technology - Abstract
Metallic lithium (Li) has been acclaimed as the most promising anode materials for lithium batteries due to its ultrahigh theoretical capacity of 3860 mA h g−1. Its practical application is impeded, however, due to the notorious problems related to dendrite growth caused by its uneven current density distribution and high Li nucleation overpotential. Here, we report a three-dimensional (3D) lithiophobic phase (Cu) and lithiophilic phase (Zn or Sn) composite architecture realized through a facile electrochemical co-deposition technology and its use as a scaffold for dendrite-free Li metal anode. It is found that the simultaneous formation of this lithiophobic-lithiophilic composite on Cu foam leads to ultrafine lithiophilic phase (20 nm) and reduced Li nucleation overpotential, as well as enhanced homogeneity, which enables a uniform electric field distribution during lithium plating/stripping, thus facilitating even and dendrite-free Li deposition. In the meanwhile, the lithiophobic component in the composite acts as a strong backbone, helping to maintain structural stability during lithium storage. Also, the as-prepared three-dimensional micro/nanoporous scaffold with large surface area can effectively reduce the local current density and suppress Li dendrite growth. The full cells with the composite architecture/Li as anode and LiFePO4 as cathode show promising electrochemical performance with over 80% capacity retention over 1600 cycles at 5 C. This work broadens the horizon of lithiophilic hosts for next-generation high-performance Li metal batteries.
- Published
- 2019
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