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556 results on '"Wang, Shuanjin"'

56. Polymeric Electrolytes for Solid‐state Lithium Ion Batteries: Structure Design, Electrochemical Properties and Cell Performances.

Author

Su, Gang, Zhang, Xin, Xiao, Min, Wang, Shuanjin, Huang, Sheng, Han, Dongmei, and Meng, Yuezhong

Subjects
POLYELECTROLYTES, SUPERIONIC conductors, SOLID electrolytes, ELECTRIC batteries, LITHIUM-ion batteries, IONIC structure, FLUOROETHYLENE
Abstract

Solid‐state electrolytes are key to achieving high energy density, safety, and stability for lithium‐ion batteries. In this Review, core indicators of solid polymer electrolytes are discussed in detail including ionic conductivity, interface compatibility, mechanical integrity, and cycling stability. Besides, we also summarize how above properties can be improved by design strategies of functional monomers, groups, and assembly of batteries. Structures and properties of polymers are investigated here to provide a basis for all‐solid‐state electrolyte design strategies of multi‐component polymers. In addition, adjustment strategies of quasi‐solid‐state polymer electrolytes such as adding functional additives and carrying out structural design are also investigated, aiming at solving problems caused by simply adding liquids or small molecular plasticizer. We hope that fresh and established researchers can achieve a general perspective of solid polymer electrolytes via this Review and spur more extensive interests for exploration of high‐performance lithium‐ion batteries. [ABSTRACT FROM AUTHOR]

Published
2024
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79. New potential substitute of PVDF binder: poly(propylene carbonate) for solvent-free manufacturing high-loading cathodes of LiFePO4|Li batteries.

Author

Zhang, Zhe, Han, Dongmei, Xiao, Min, Wang, Shuanjin, Feng, Yuhong, Huang, Sheng, and Meng, Yuezhong

Abstract

For decades, the slurry coating has been used to manufacture lithium-ion battery electrodes. The process involves toxic and expensive organic solvents, followed by time- and energy-consuming vacuum drying. Herein, a solvent-free method for LiFePO4 cathode preparation using lithium-ion conductive and biodegradable poly(propylene carbonate) (PPC) as a binder is proposed. The cathode is prepared by simple ball milling and hot-pressing method. PPC with a glass transition temperature of 36.5 ℃ is processed at a rubbery state and PPC work as a binder at glassy state while battery running. Microscopically, amorphous PPC contains more polar carbonate groups that coordinate lithium ion at a medium strength to absorb and desorb lithium-ion, which is good for lithium-ion migration. PPC with good mechanical strength as the binder and artificial cathode electrolyte interface in LiFePO4 cathode reduces the internal resistance of the battery effectively and protects LiFePO4 from deformation, realizing the remarkable improvement of electrochemical performance of battery. The mass loading for the LiFePO4 cathode with PPC binder is up to 20 mg/cm2 and the initial discharge capacity of LiFePO4|Li batteries reach 141.9 mAh/g at 0.5 C, and the capacity retention is 79.1% after 800 cycles. Replacing high-cost and environment-polluting PVDF with low-cost and environment-friendly PPC, this solvent-free method will largely reduce the cost and emission of the lithium-ion battery industry. [ABSTRACT FROM AUTHOR]

Published
2023
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80. Simulation on Interplay Between Morphological Evolution and Defect in Polycrystalline TSV During EM

Author

Zeng, Xin, Huang, Zhiheng, Wang, Shuanjin, Xiao, Min, Meng, Yuezhong, and Liu, Yang

Abstract

Through-silicon vias (TSVs) have now enabled a variety of state-of-the-art 3-D packaged microelectronic devices. Nevertheless, electromigration (EM) can induce local damages and eventually lead to open-circuit failures (OCFs) inside the Cu-TSVs. Here, a phase field (PF) model is developed to conduct a systematic and detailed study on the interplay between morphological evolution and defects in polycrystalline TSVs during EM. A decisive contribution from the alignment between grain boundaries (GBs) and the EM-induced flux is identified by analyzing three local fluxes and their net sum, i.e., the total flux. Four types of local damages can be classified according to the distribution of the total flux in the grain structure where the damages initiate. TSV models with complex and close-to-real grain structures show that the time to OCF in TSVs with a combined bamboo-like and poly-cluster (PC) structure is about 30% shorter than the counterpart with a combined columnar and PC structure. In addition, both voids and second phase particles (SPPs) can delay the OCF in TSVs under the GB dominant diffusion mechanism. Under the interfacial dominant diffusion mode, however, voids are found to significantly accelerate the OCF.

Published
2024
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84. One-Step Electrochemical Dealloying of 3D Bi-Continuous Micro-Nanoporous Bismuth Electrodes and CO 2 RR Performance.

Author

Lai, Wenqin, Liu, Yating, Zeng, Mingming, Han, Dongmei, Xiao, Min, Wang, Shuanjin, Ren, Shan, and Meng, Yuezhong

Subjects
CARBON dioxide, BISMUTH, ELECTROLYTIC reduction, CARBON dioxide reduction, BINARY metallic systems, NANOPOROUS materials
Abstract

The rapid development of electrochemical CO2 reduction offers a promising route to convert intermittent renewable energy into products of high value-added fuels or chemical feedstocks. However, low faradaic efficiency, low current density, and a narrow potential range still limit the large-scale application of CO2RR electrocatalysts. Herein, monolith 3D bi-continuous nanoporous bismuth (np-Bi) electrodes are fabricated via a simple one-step electrochemical dealloying strategy from Pb-Bi binary alloy. The unique bi-continuous porous structure ensures highly effective charge transfer; meanwhile, the controllable millimeter-sized geometric porous structure enables easy catalyst adjustment to expose highly suitable surface curvatures with abundant reactive sites. This results in a high selectivity of 92.6% and superior potential window (400 mV, selectivity > 88%) for the electrochemical reduction of carbon dioxide to formate. Our scalable strategy provides a feasible pathway for mass-producing high-performance and versatile CO2 electrocatalysts. [ABSTRACT FROM AUTHOR]

Published
2023
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94. Effect of water management in membrane and cathode catalyst layers on suppressing the performance hysteresis phenomenon in anion-exchange membrane fuel cells

Author

Otsuji, Kanji, primary, Shirase, Yuto, additional, Asakawa, Takayuki, additional, Yokota, Naoki, additional, Nagase, Katsuya, additional, Xu, Weilin, additional, Song, Ping, additional, Wang, Shuanjin, additional, Tryk, Donald A., additional, Kakinuma, Katsuyoshi, additional, Inukai, Junji, additional, Miyatake, Kenji, additional, and Uchida, Makoto, additional

Published
2022
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