Conversion-type anode chemistry with interfacial compatibility toward Ah-level near-neutral high-voltage zinc ion batteries

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外文摘要：High-voltage aqueous zinc ion batteries(AZIBs)with a high-safety near-neutral electrolyte is of great significance for practical sustainable application;however,they suffer from anode and electrode/electrolyte interfacial incompatibility.Herein,a conversion-type anode chemistry with a low anodic potential,which is guided by the Gibbs free energy change of conversion reaction,was designed for high-voltage near-neutral AZIBs.A reversible conversion reaction between ZnC2O4·2H2O particles and three-dimensional Zn metal networks well-matched in CH3COOLi-based electrolyte was revealed.This mechanism can be universally validated in the battery systems with sodium or iodine ions.More importantly,a cathodic crowded micellar electrolyte with a water confinement effect was proposed in which lies the core for the stability and reversibility of the cathode under an operating platform voltage beyond 2.0 V,obtaining a capacity retention of 95％after 100 cycles.Remarkably,the scientific and technological challenges from the coin cell to Ah-scale battery,sluggish kinetics of the solid-solid electrode reaction,capacity excitation under high loading of active material,and preparation complexities associated with large-area quasi-solid electrolytes,were explored,successfully achieving an 88％capacity retention under high loading of more than 20 mg cm-2 and particularly a practical 1.1 Ah-level pouch cell.This work provides a path for designing low-cost,eco-friendly and high-voltage aqueous batteries.

外文关键词：

zinc compound anodeconversion reactionvoltage regulationinterfacial designpouch cell

作者：

Shan Guo、Liping Qin、Jia Wu、Zhexuan Liu、Yuhao Huang、Yiman Xie、Guozhao Fang、Shuquan Liang

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作者单位：

School of Materials Science and Engineering,Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province,Central South University,Changsha 410083,China

College of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China

Information and Network Center,Central South University,Changsha 410083,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Hunan ProvinceScience and Technology Innovation Program of Hunan Province

项目编号：

5207241151932011522722602021JJ200602021RC3001

出版年：

2024

DOI：

10.1093/nsr/nwae181

国家科学评论(英文版)

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ISSN：

年,卷(期)：2024.11(7)