High rate and cycling stable Li metal anodes enabled with aluminum-zinc oxides modified copper foam

作     者：Songtao Lu Zhida Wang He Yan Rui Wang Ke Lu Yingwen Cheng Wei Qin Xiaohong Wu Songtao Lu;Zhida Wang;He Yan;Rui Wang;Ke Lu;Yingwen Cheng;Wei Qin;Xiaohong Wu

作者机构：MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and StorageSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Department of Chemistry and BiochemistryNorthern Illinois UniversityDekalb 60115ILUnited States 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2020年第29卷第2期

页      面：87-92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：The financial supports of the National Natural Science Foundation of China(Grant Nos.51572060,51702067 and 51671074) Special Financial Grant from the China Postdoctoral Science Foundation(No.2017T100239) General Financial Grant from the China Postdoctoral Science Foundation(No.2016M590279) the startup grants from Northern Illinois University 

主　　题：Composite Lianode Metal foams Surface modification Limetal batteries 3D current collector 

摘      要：Metallic Li is a promising anode material for high energy density batteries but it suffers from poor stability and formation of unsafe dendrites. Previous studies demonstrated that 3 D metal foams are able to improve the stability of Li metal but the properties of these foams are inherently limited. Here we report a facile surface modification approach via magnetron sputtering of mixed oxides that effectively modulate the properties of Cu foams for supporting Li metal with remarkable stability. We discovered that hybrid Li anodes with Li metal thermally infused to aluminum-zinc oxides(AZO) coated Cu foams have significantly improved stability and reactivity compared with pristine Li foils and Li infused to unmodified Cu foams. Full cells assembled with a Li Fe PO4 cathode and a hybrid anode maintained low and stable charge-transfer resistance(50) during 500 cycles in carbonate electrolytes, and exhibited superior rate capability(~100 m Ah g-1 at 20 C) along with better electrochemical reversibility and surface stability. The AZO modified Cu foams had superior mechanical strength and afforded the hybrid anodes with minimized volume change without the formation of dendrites during battery cycling. The rational construction of surface architecture to precisely control Li plating and stripping may have great implications for the practical applications of Li metal batteries.