Revealing the roles of the solid-electrolyte interphase in designing stable, fast-charging, low-temperature Li-ion batteries.

ABSTRACT: Designing the solid-electrolyte interphase (SEI) is critical for stable, fast-charging, low-temperature Li-ion batteries. Fostering a "fluorinated interphase," SEI enriched with LiF, has become a popular design strategy. Although LiF possesses low Li-ion conductivity, many studies have reported favorable battery performance with fluorinated SEIs. Such a contradiction suggests that optimizing SEI must extend beyond chemical composition design to consider spatial distributions of different chemical species. In this work, we demonstrate that the impact of a fluorinated SEI on battery performance should be evaluated on a case-by-case basis. Sufficiently passivating the anode surface without impeding Li-ion transport is key. We reveal that a fluorinated SEI containing excessive and dense LiF se

SUBMITTER: Tao L 

PROVIDER: S-EPMC12002247 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature