成膜添加剂用于高能量密度电池电解液的综述

Summaries of film-forming additive applied in high energy density battery electrolyte

综述高能量密度电极材料的主要问题、成膜添加剂的工作机制以及在高能量密度电极电解液中的应用。目前,高能量密度电极电解液的重要研究方向是开发高性能成膜添加剂,在电池正、负极形成优质的固体电解质相界面(SEI)膜,以解决高电压下电解液氧化分解,以及高镍多元材料容量衰减问题,同时兼顾高容量硅基负极的体积效应。

The main problems of high energy density electrode materials,the working mechanism of film-forming additives and their applications in high energy density electrode electrolytes were reviewed.The current important research direction of high energy density electrode electrolyte was to develop high-performance film-forming additives,by which the high-quality solid electrolyte phase interface(SEI)film in the positive and negative electrodes of the battery could be formed.Such SEI film could solve the problem of oxidative decomposition of the electrolyte at high voltage and the capacity decay of the high-nickel multi-material.Meanwhile,the volume effect of the high-capacity silicon-based anode was also considered.