Li metal is the most attractive and promising anode material for next-generation high-energy batteries.However,uncontrolled Li dendrite growth during cycling remains a highly challenging drawback.To solve this problem,silver-coated graphene(Ag/GH)was prepared via a simple liquid-phase reduction method.The effect of Ag/GH on Li deposition behavior was investigated by adjust-ing the dispersion of Ag nanoparticles(Ag NPs).Subse-quently,a composite electrode was fabricated via uniform deposition of metallic Li on Ag/GH.Ag was used as a lithiophilic nucleating agent to ensure uniform deposition of Li and inhibit the growth of Li dendrites on the anode.The prepared composite anode showed a significantly improved performance compared to the unmodified elec-trode.The symmetric cell comprising this composite electrode exhibited a stable cycling performance with a low hysteresis of～40 mV and a lifetime of＞2000 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 synthesis.Thus,the composite Ag/GH anode exhibited improved performance and the preparation method showed significant potential for application in the manufacture of Li metal batteries.

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

School of Materials Science and Engineering,Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology,Tianjin University,Tianjin 300350,China;Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou 350207,China;China Energy Lithium Co.,Ltd,Tianjin 300072,China;State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China

稀有金属（英文版）

[1]Yu Gao;Bing-Feng Cui;Jia-Jun Wang;Zhao-Yong Sun;Qiang Chen;Yi-Da Deng;Xiao-Peng Han;Wen-Bin Hu-.Improving Li reversibility in Li metal batteries through uniform dispersion of Ag nanoparticles on graphene)[J].稀有金属（英文版）,2022(10):3391-3400

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