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Your search keyword '"Cao, Dianxue"' showing total 549 results
Start Over Author "Cao, Dianxue" Publication Year Range Last 10 years Publication Type Academic Journals
549 results on '"Cao, Dianxue"'

46. Enhancing Electrochemical Performance through Swift Functional Group Tuning of MXenes.

Author

Cui, Penghui, Wang, Hejing, Yang, Bowen, Dong, Shu, Jiao, Menggai, Zhao, Ruizheng, Zhu, Kai, Fang, Yong‐Zheng, Zhou, Zhen, and Cao, Dianxue

Subjects
TRANSITION metal carbides, FUNCTIONAL groups, ENGINEERING design, NITRIDES, ANODES
Abstract

Chemical manipulation of surface functional groups on two‐dimensional transition metal carbides and/or nitrides (MXenes) provides a wide range of design and application prospects. However, achieving rapid targeted modification of surface groups remains a significant challenge. Herein, we propose a general strategy to swiftly shear and customize surface groups on Ti3C2Tx−MXene via the flash Joule heating (FJH) reaction within 1 s. Successfully, MXenes with 9 target terminations, including VII A (F, Cl, Br, or I), VI A (O, S, or Se), and V A (N or P), either single or multiple, are synthesized, with a surface content of up to about 76 %. The impact of these terminations is systematically analyzed on electrochemical performance, demonstrating that VI A and V A terminations have higher electrochemical activity than VII A. Particularly, N‐, S‐, and O‐terminated MXenes exhibit enhanced specific capacities and undecayed cycling performance. These findings offer valuable insights for the surface engineering design and performance optimization of functional materials. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Hydrophilic‐Zincophobic Separator Enabling by Crystal Structure Regulation toward Stabilized Zn Metal Anode.

Author

Lv, Shujun, Su, Mingyu, Li, Zhuo, Mao, Yiyang, Yin, Jinling, cao, Dianxue, Wang, Guiling, Yi, Jin, Ning, Fanghua, and Zhu, Kai

Subjects
HYDROGEN evolution reactions, CRYSTAL structure, ION transport (Biology), GLASS fibers, LITHIUM cells, ENERGY storage, ZINC ions
Abstract

Aqueous zinc‐ion batteries (ZIBs) hold significant promise for large‐scale energy storage. While considerable strides have been made in modifying separators, the challenge of developing dendrite‐free, corrosion‐resistant, and cost‐effective separators for achieving extended cycling performance of Zn anodes persists. In light of this, a TiO2 coating separator to mitigate interfacial corrosion and passivation reactions, thereby facilitating high‐performance ZIBs is designed. This study delves into the influence of the loading amount and crystal phase of the TiO2 coating layers on separator modification. Zn symmetric cells employing the anatase TiO2‐modified glass fiber (A‐TiO2@GF) separator demonstrate superior Zn2+ ion transport kinetics in a mild ZnSO4 electrolyte, ensuring sustained long‐term stability and uniform Zn deposition. Furthermore, the reduced hydrogen evolution reaction (HER) activity of A‐TiO2 coatings curbs H+ ion migration, minimizing interfacial corrosion and HER. Consequently, the assembled Zn||CaV8O20 zinc‐ion full cells demonstrate outstanding long‐term durability and impressive specific capacity, boasting a discharge capacity of 142 mAh g−1 after 1000 cycles. This work introduces a straightforward interface engineering strategy for creating efficient separators in zinc‐ion batteries, promoting uniform Zn deposition. [ABSTRACT FROM AUTHOR]

Published
2024
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48. Reversible Protonated Electrolyte Additive Enabling Dendrites‐Free Zn Metal Anode with High Depth of Discharge.

Author

Wang, Yuao, Wang, Tiantian, Mao, Yiyang, Li, Zhuo, Yu, Huiying, Su, Mingyu, Ye, Ke, Cao, Dianxue, and Zhu, Kai

Subjects
HYDROGEN evolution reactions, ANODES, METALS, DENDRITIC crystals, AMINO acids, ELECTROLYTES
Abstract

Aqueous zinc ion batteries (AZIBs) have stimulated extensive attention due to their environmental friendliness and low cost. Unfortunately, the inevitable dendrite growth and corrosion on the zinc (Zn) anode severely hinder the practical application of AZIBs. Herein, an amino acid containing an imidazole group is introduced as an effective additive to address these issues. The dynamic conversion of amino acid and protonated amino acid creates a pH buffer function that regulates solution pH in real time, inhibits hydrogen evolution reaction (HER), and eliminates notorious by‐products. In addition, the protonated amino acid is preferentially adsorbed on the Zn anode, preventing contact of the active water with the Zn surface and promoting homogeneous Zn deposition. Thus, the amino acid‐based electrolyte promotes dendrite free plating/stripping with a Coulombic efficiency up to 99.67% and cycle lifetime of 2600 h. In particular, a depth of discharge of up to 87% can be achieved with an ultra‐high areal capacity of 24 mAh cm−2. The developed Zn||CVO full cell also exhibits better electrochemical performance than that without additives. This work provides an effective and convenient approach for safe and efficient Zn‐ion batteries. [ABSTRACT FROM AUTHOR]

Published
2024
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