关键词: 电池, 电解液, 溶剂化结构, 电极界面模型, 固体电解质界面膜

Abstract:

Solid-electrolyte interphase (SEI) layer formed on the electrode by electrolyte decomposition has been considered to be one of the most important factors affecting the battery performance. We discover that the metal ion solvation structure can also influence the performance, particularly, it can elucidate many phenomena that the SEI cannot. In this review, we summarize the importance of the metal ion solvation structure and the derived metal ion de-solvation behaviors, by which we can build an interfacial model to show the relationship between the interfacial behavior and electrode performance, and then apply to different electrode and battery systems. We emphasize the influences of ionic and molecular interactions on electrode surface that differ from previous SEI-based interpretations. This review provides a new view angle to understand the battery performance and guide the electrolyte design.

Key words: battery, electrolyte, solvation structure, electrode interfacial model, solid electrolyte interphase layer