Enhanced electrochemical performance of Si/C electrode through surface modification using SrF_(2) particle

作     者：Jun Yang Yuan-hua Lin Bing-shu Guo Ming-shan Wang Jun-chen Chen Zhi-yuan Ma Yun Huang Xing Li Jun Yang;Yuan-hua Lin;Bing-shu Guo;Ming-shan Wang;Jun-chen Chen;Zhi-yuan Ma;Yun Huang;Xing Li

作者机构：School of New Energy and MaterialsSouthwest Petroleum UniversityChengdu 610500China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2021年第28卷第10期

页      面：1621-1628页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.52072322) the Department of Science and Technology of Sichuan Province,China(Nos.2019YFG0220 and 2019-GH02-00052-HZ) 

主　　题：silicon-based anode volume expansion strontium fluoride solid electrolyte interface cycling stability 

摘      要：The silicon-based material exhibits a high theoretical specific capacity and is one of the best anode for the next generation of advanced lithium-ion batteries(LIBs).However,it is difficult for the silicon-based anode to form a stable solid-state interphase(SEI)during Li alloy/de-alloy process due to the large volume change(up to 300%)between silicon and Li4.4Si,which seriously limits the cycle life of the ***,we use strontium fluoride(SrF_(2))particle to coat the silicon-carbon(Si/C)electrode(SrF_(2)@Si/C)to help forming a stable and high mechanical strength SEI by spontaneously embedding the SrF_(2) particle into *** the formed SEI can inhibit the volume expansion of the silicon-carbon anode during the *** electrochemical test results show that the cycle performance and the ionic conductivity of the SrF_(2)@Si/C anode has been significantly *** X-ray photoelectron spectroscopy(XPS)analysis reveals that there are fewer electrolyte decomposition products formed on the surface of the SrF_(2)@Si/C *** study provides a facile approach to overcome the problems of Si/C electrode during the electrochemical cycling,which will be beneficial to the industrial application of silicon-based anode materials.