Uniform lithium deposition induced by copper phthalocyanine additive for durable lithium anode in lithium-sulfur batteries  

作　　者：Ting Hu Yuxuan Guo Yixuan Meng Ze Zhang Ji Yu Jianxin Cai Zhenyu Yang 

机构地区：[1]Key Laboratory of Jiangxi Province for Environment and Energy Catalysis,School of Chemistry and Chemical Engineering,Nanchang University,Nanchang 330031,China

出　　处：《Chinese Chemical Letters》2024年第5期447-452,共6页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC,Nos.22269013,22263009);the Natural Science Foundation of Jiangxi Province(Nos.20224ACB213001,20202ACB202004,20213BCJ22024,20212BBE53051);the Key Laboratory of Jiangxi Province for Environment and Energy Catalysis(No.20181BCD40004).

摘　　要：Copper phthalocyanine(CuPc)is adopted as an electrolyte additive to stabilize lithium anode for lithiumsulfur(Li-S)batteries.CuPc with a planar molecular structure and lithiophilic N-containing group,is likely to be adsorbed on the surface of Li anode to form a coating layer,which can restrict the direct contact between Li anode and solvents,and guide the uniform deposition of Li^(+)ions.The Li||Li symmetric cells demonstrate a stable cycle performance,and Li||Cu cells show high Coulombic efficiencies.In Li-S batteries,the formed stable solid-electrolyte interface(SEI)film containing copper sulfides can protect Li anode from the polysulfide corrosion and side reactions with the electrolyte,leading to the compact and smooth surface morphology of Li anode.Therefore,the Li-S batteries with CuPc additive deliver much higher capacity,better cycle performance and rate capability as compared to the one without CuPc additive.

关 键 词：Copper phthalocyanine Electrolyte additive Stable SEI film Stabilized Li anode Lithium-sulfur batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]