| 正极材料钴酸锂的SEI膜研究 |
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| 引用本文： | 袁莉,张玥,王坤,刘大凡,赵洪,安峰,张晓行.正极材料钴酸锂的SEI膜研究[J].无机盐工业,2014,46(4):69-71. |
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| 作者姓名： | 袁莉 张玥 王坤 刘大凡 赵洪 安峰 张晓行 |
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| 作者单位： | 1.中海油天津化工研究设计院，天津 300131；2.天津大学材料学院 |
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| 基金项目： | 天津市自然科学基金(11JCYBJC08000) |
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| 摘 要： | 通过不同测定方法对SEI膜的形成过程和主要组分进行测定。通过循环伏安和阻抗测试，确定了正极材料钴酸锂的表面SEI膜在第一次循环过程中形成，其后随着循环次数的增加，其表面SEI膜变得更加致密，并且有利于锂离子通过，但其厚度不再增加；通过电镜分析同样确定了正极材料钴酸锂的表面SEI膜在第一次循环过程中形成，并且其厚度在10 nm以下；通过X射线光电子能谱分析（XPS）确定了正极材料钴酸锂的表面SEI膜的组成为氟化锂和有机锂化合物。
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| 关 键 词： | LiCoO2 SEI膜 XPS |
Study on SEI of cathode material LiCoO2 |
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| YUAN Li,ZHANG Yue,WANG Kun,LIU Da-Fan,ZHAO Hong,AN Feng,ZHANG Xiao-Xing.Study on SEI of cathode material LiCoO2[J].Inorganic Chemicals Industry,2014,46(4):69-71. |
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| Authors: | YUAN Li ZHANG Yue WANG Kun LIU Da-Fan ZHAO Hong AN Feng ZHANG Xiao-Xing |
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| Affiliation: | 1.CNOOC Tianjin Chemical Research & Design Institute，Tianjin 300131，China；
2.School of Materials Science and Engineering, Tianjin University |
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| Abstract: | The formation process and main composition of solid electrolyte interface（SEI） of the cathode material LiCoO2 of
lithium-ion battery were investigated by different measurement methods.It was confirmed by cycle voltammetry curves and EIS that the SEI on the surface of LiCoO2 was formed at the first cycle and with the increase of cycle numbers，SEI became denser and better for Li+ to pass through，but it thickness had no more increase.SEM analysis also proved the SEI formed at the first cycle and its thickness was under 10 nm.XPS confirmed the components of SEI were LiF and organolithium compound. |
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| Keywords: | LiCoO2 solid electrolyte interface XPS |
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