Diethyl phenylphosphonite contributing to solid electrolyte interphase and cathode electrolyte interphase for lithium metal batteries  

作　　者：Chunxia Miao Shihan Qi Kang Liang Yanli Qi Junda Huang Mingguang Wu Hongshun Zhao Jiandong Liu Yurong Ren Jianmin Ma 

机构地区：[1]School of Materials Science and Engineering,Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery,Changzhou University,Changzhou 213164,Jiangsu,China [2]School of Physics and Electronics Hunan University,Changsha 410082,Hunan,China [3]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China

出　　处：《Journal of Energy Chemistry》2021年第12期566-573,I0013,共9页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (91961126,22078029);the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions;Qinglan Project of Education Department of Jiangsu Province;Jiangsu Development &Reform Commission;Changzhou Development and Reform Commission for their support。

摘　　要：Lithium metal batteries have obtained increasing interest due to their high specific capacity.Nonetheless,the growth of lithium dendrites brings safety risks to batteries and further deteriorates the performance.Herein,we explore diethyl phenylphosphonite(DEPP) as the electrolyte additive to alleviate this problem.DEPP can be preferentially decomposed than carbonate solvents to form the stable interface between electrolyte and lithium anode for inhibiting the dendrite growth.As expected,the symmetrical LiIILi cells could achieve a stable cycling performance with 200 h at 1 mA cm^(-2).Moreover,DEPP can be preferentially oxidized on the surface of lithium cobalt oxides(LiCoO_(2)) to form a dense cathode electrolyte interphase(CEI) film for suppressing the continuous oxidative decomposition of the electrolyte and eliminating the adverse effects of HF on the battery.This endows LiCoO_(2) IILi full battery with the enhanced cycling and rate performance.

关 键 词：Lithium metal batteries Electrolyte additive Diethyl phenylphosphonite Lithium dendrites Capacity retention 

分 类 号：TQ131.11[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]