Improving Li reversibility in Li metal batteries through uniform dispersion of Ag nanoparticles on graphene

作     者：Yu Gao Bing-Feng Cui Jia-Jun Wang Zhao-Yong Sun Qiang Chen Yi-Da Deng Xiao-Peng Han Wen-Bin Hu Yu Gao;Bing-Feng Cui;Jia-Jun Wang;Zhao-Yong Sun;Qiang Chen;Yi-Da Deng;Xiao-Peng Han;Wen-Bin Hu

作者机构：School of Materials Science and EngineeringTianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining TechnologyTianjin UniversityTianjin300350China Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityFuzhou350207China China Energy Lithium Co.LtdTianjin300072China State Key Laboratory of Marine Resource Utilization in South China SeaSchool of Materials Science and EngineeringHainan UniversityHaikou570228China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第10期

页      面：3391-3400页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51972224) China Postdoctoral Science Foundation(No.2019M661014) 

主　　题：Ag/graphene composite Uniform Li deposition Li anodes Li metal batteries 

摘      要：Li metal is the most attractive and promising anode material for next-generation high-energy ***,uncontrolled Li dendrite growth during cycling remains a highly challenging *** solve this problem,silver-coated graphene(Ag/GH)was prepared via a simple liquid-phase reduction *** effect of Ag/GH on Li deposition behavior was investigated by adjusting the dispersion of Ag nanoparticles(Ag NPs).Subsequently,a composite electrode was fabricated via uniform deposition of metallic Li on Ag/*** was used as a lithiophilic nucleating agent to ensure uniform deposition of Li and inhibit the growth of Li dendrites on the *** prepared composite anode showed a significantly improved performance compared to the unmodified *** symmetric cell comprising this composite electrode exhibited a stable cycling performance with a low hysteresis of~40 mV and a lifetime of2000 h at a current density of 0.5 mA·cm^(-2).Meanwhile,the discharge capacity reached 0.5 mAh·cm^(-2).In addition,Ag/GH was found to be amenable to large-scale ***,the composite Ag/GH anode exhibited improved performance and the preparation method showed significant potential for application in the manufacture of Li metal batteries.