Dual-layer vermiculite nanosheet based hybrid film to suppress dendrite growth in lithium metal batteries  

作　　者：Xiang-Qun Xu Feng-Ni Jiang Shi-Jie Yang Ye Xiao He Liu Fangyang Liu Lei Liu Xin-Bing Cheng 

机构地区：[1]Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China [2]Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing 211189,Jiangsu,China [3]School of Metallurgy and Environment,Central South University,Changsha 410083,Hunan,China [4]School of Chemistry and Materials Science,Nanjing University of Information Science&Technology,Nanjing 210044,Jiangsu,China [5]Advanced Research Institute of Multidisciplinary Science,Beijing Institute of Technology,Beijing 100081,China [6]College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China

出　　处：《Journal of Energy Chemistry》2022年第6期205-210,I0006,共7页能源化学（英文版）

基　　金：supported by National Natural Science Foundation of China (22179070, U1932220)。

摘　　要：Lithium metal anode has become a favorable candidate for next-generation rechargeable batteries.However, the unstable interface between lithium metal and electrolyte leads to the growth of dendrites,resulting in the low Coulombic efficiency and even the safety concerns. Herein, a rigid-flexible dual-layer vermiculite nanosheet(VN) based organic-inorganic hybrid film on lithium metal anode is proposed to suppress dendrite growth and relieve volume fluctuations. The inner mechanically robust VN layer(3 μm thick) enhances the mechanical properties of the protective layer, while the outer polymer(4 μm thick) can enhance the flexibility of the hybrid layer. The Li | Li symmetric cell with protected lithium shows an extended life of over 670 h. The full cell with Li anode protected by dual-layer interface exhibits a better capacity retention of 80% after 174 cycles in comparison to bare Li anode with 94 cycles.This study provides a novel approach and a significant step towards prolonging lifespan of lithium metal batteries.

关 键 词：Lithium metal anode DENDRITE Organic-inorganic hybrid layer Dual-layer interface Two-dimensional vermiculite nanosheet 

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