Self-assembled VS_(2) microflowers buffering volume change during charging and discharging towards high-performance zinc ion batteries  

作　　者：Tingsheng Wang Wujie Gao Yuanxi Zhao Songcan Wang Wei Huang 

机构地区：[1]Frontiers Science Center for Flexible Electronics,Xi’an Institute of Flexible Electronics(IFE),Northwestern Polytechnical University,Xi’an 710072,China [2]Key Laboratory of Flexible Electronics of Zhejiang Province,Ningbo Institute of Northwestern Polytechnical University,Ningbo 315103,China [3]School of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《Journal of Materials Science & Technology》2024年第6期107-113,共7页材料科学技术（英文版）

基　　金：financially supported by the Ningbo Natural Science Foundation(No.202003N4054);the Fundamental Research Funds for the Central Universities.

摘　　要：VS_(2) has attracted increasing attention as a cathode material for aqueous zinc ion batteries because of its proper large layer spacing,weak interlayer interactions,multiple valence states of V,and excellent electrical conductivity,but its large volume change during charging and discharging leads to poor cycling stability.Herein,we report a one-step hydrothermal synthesis of VS_(2) microflowers with proper lamellar spacing,which provides a stable framework for the insertion/deinsertion of zinc ions and enhances the cycling stability,delivering an initial charge capacity of 128.3 mAh g^(-1) at 3 A g^(-1) and maintains a charge capacity of 100.1 mAh g^(-1) after 900 cycles.In addition,the optimized VS_(2) cathode shows specific capacities of 215.7 and 150.5 mAh g^(-1) at the current densities of 0.1 and 2 A g^(-1),respectively,demonstrating that the microflower structure with a high specific surface area and a short diffusion distance also significantly enhances the rate performance.

关 键 词：Vanadium sulfide Microflower Zinc ion batteries Cathode materials Volume change 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]