锂离子电池电极材料SEI膜的研究概况*

综述了锂离子电池电极材料表面的“固体电解质界面膜”（SEI 膜） 的成膜机理及研究概况，并分析了电解液、温度和电流密度对SEI膜形成过程的影响；在此基础上，对SEI膜的改性（主要包括电极材料的改性和添加电解液添加剂）进行了分析，认为SEI膜的研究将对电极材料和电解液添加剂的改进研究产生重要影响。

Research survey on SEI film for electrode material of lithium ion batteries

The research survey and formation principle of solid electrolyte interface（SEI） film applied on the surface of electrode material of lithium ion batteries were summarized.The effects of electrolyte，temperature，and current density on the establishment process of SEI film were analyzed.On the basis of that the modification（mainly including the modification of electrode material and adding electrolyte additive） of SEI were also discussed.It′s believed that the research of SEI film will have an important influence on the improvement research of electrode materials and electrolyte additive.