Solid Electrolyte Interphase on Lithium Metal Anodes

Abstract

Lithium metal batteries (LMBs) represent the most promising next‐generation high‐energy density batteries. The solid electrolyte interphase (SEI) film on the lithium metal anode plays a crucial role in regulating lithium deposition and improving the cycling performance of LMBs. In this review, we comprehensively present the formation process of the SEI film, while elucidating the key properties such as electronic conductivity, ionic conductivity, and mechanical performance. Furthermore, various approaches for constructing the SEI film are discussed from both electrolyte regulation and artificial coating design perspectives. Lastly, future research directions along with development recommendations are also provided. This review aims to provide possible strategies for the further improvement of SEI film in LMBs and highlight their inspiration for future research directions.

Stable cyclic ether as an electrolyte additive for high-performance lithium metal batteries

“…1 However, LMAs face critical challenges such as uneven lithium-ion (Li + ) deposition and severe interfacial side reactions during cycling, which result in a limited cycle lifespan for lithium metal batteries (LMBs) that is insufficient for practical applications. 2 To address these issues and improve the stability of LMBs, researchers have developed various protective strategies, including the construction of artificial protective layers, 3,4 the optimization of current collectors, 5,6 the alteration of the external environmental conditions, 7,8 and the design of novel electrolytes. 9,10…”