In situ fluorinated solid electrolyte interphase towards long-life lithium metal anodes  

作　　者：Shan-Min Xu Hui Duan Ji-Lei Shi Tong-Tong Zuo Xin-Cheng Hu Shuang-Yan Lang Min Yan Jia-Yan Liang Yu-Guo Yang Qing-Hua Kong Xing Zhang Yu-Guo Guo 

机构地区：[1]School of Science,Beijing Jiaotong University,Beijing 100044,China [2]CAS Key Laboratory of Molecular Nanostructure and Nanotechmology,CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences(BNLMs),Institute of Chemistry,Chinese Academy of Sciences(CAS),Beijing 100190,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nano Research》2020年第2期430-436,共7页纳米研究（英文版）

基　　金：This work was supported by the Basic Science Center Project of National Natural Science Foundation of China(No.51788104);the National Natural Science Foundation of China(Nos.21773264,21805062,21703257,21603011);the National Key R&D Program of China(Nos.2016YFA0202500 and 2018YFB0104300);Beijing Natural Science Foundation(No.L172023);the"Transformational Technologies for Clean Energy and Demonstration",Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA 21070300);the Youth Innovation Promotion Association CAS(No.2019033);the Fundamental Research Funds for the Central Universities(No.2018JBM067).

摘　　要：The urgent demands for high-energy-density rechargeable batteries promote a flourishing development of Li metal anode.However,the uncontrollable dendrites growth and serious side reactions severely lirmit its commercial application.Herein,an artificial LiF-rich solid electrolyte interphase(SEl)is constructed at molecular-level using one-step photopolymerization of hexafluorobutyl acrylate based solution,where the LiF is in situ generated during photopolymerization process(denoted as PHALF).The LiF-rich layercomprised flexible polymer matrix and inorganic LiF filler not only ensures intimate contact with Li anode and adapts volume fluctuations during cycling but also regulates Li deposition behavior,enabling it to suppress the dendrite growth and block side reactions between the electrolyte and Li metal.Accordingly,the PHALF-Li anode presents superior stable cycling performance over 500 h at 1 mA·cm^-2 for 1 mA·h·cm^-2 without dendrites growth in carbonate electrolyte.The work provides a novel approach to design and build in situ artificial SEl layer for high-safety and stable Li metal anodes.

关 键 词：lithium metal batteries artificial in situ solid electrolyte interphase LIF 

分 类 号：TM912[电气工程—电力电子与电力传动]