Morphology and modulus evolution of graphite anode in lithium ion battery:An in situ AFM investigation

查看全文 作　　者：DENG [1,2]Xin;LIU [1,2]XingRui;YAN [1]HuiJuan;WANG [1]Dong;WAN [1]LiJun

机构地区：[1]Institute of Chemistry,Chinese Academy of Sciences;[2]University of Chinese Academy of Sciences

出　　处：《Science China Chemistry》索引2014年第57卷第1期,共6页

基　　金：supported by the National Basic Research Program of China(2012CB932900,2011YQ03012415,and 2011CB808700);the National Natural Science Foundation of China(21073204,21121063,21373237,21127901),and the Chinese Academy of Sciences 摘　　要：We investigated the interfacial electrochemical processes on graphite anode of lithium ion battery by using highly oriented pyrolytic graphite(HOPG)as a model system.In situ electrochemical atomic force microscopy experiments were performed in 1M lithium bis(trifluoromethanesulfonyl)imide/ethylene carbonate/diethyl carbonate to reveal the formation process of solid electrolyte interphase(SEI)on HOPG basal plane during potential variation.At 1.45 V,the initial deposition of SEI began at the defects of HOPG surface.After that,direct solvent decomposition took place at about 1.3 V,and the whole surface was covered with SEI.The thickness of SEI was 10.4±0.2 nm after one cycle,and increased to 13.8±0.2 nm in the second cycle,which is due to the insufficient electron blocking ability of the surface film.The Young’s modulus of SEI was measured by a peak force quantitative nanomechanical mapping(QNM).The Young’s modulus of SEI is inhomogeneous.The statistic value is 45±22 MPa,which is in agreement with the organic property of SEI on basal plane of HOPG. 关键词：LITHIUM ion battery,in SITU electrochemical AFM,SEI,modulus

相关文献

参考文献（37）
引证文献（7）
耦合文献（1）

参考文献(37)

引证文献(7)

耦合文献(1)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Morphology and modulus evolution of graphite anode in lithium ion battery:An in situ AFM investigation

参考文献(37)

引证文献(7)

耦合文献(1)

用户提示