Electrolyte/electrode interphase regulation with methylthiolation ionic liquids for high-voltage quasi-solid-state Li metal batteries.

ABSTRACT: Quasi-solid-state lithium metal batteries (QSSLMBs) are hindered by interfacial instability at high-voltage cathodes and uncontrolled lithium dendrite growth at the anode, limiting their cycling life and energy density. To overcome these challenges, we have developed a piperidine-based ionic liquid (IL) additive featuring a methylthiolation cationic segment that stabilizes the interphase of layered oxide cathodes and lithium anodes under fast charging and high-voltage conditions. These ILs preferentially oxidize to form a robust cathode-electrolyte interphase with LiF and sulfide species, which effectively suppresses dissolution of transition metal and enhances interfacial ion transport. Simultaneously, the IL-derived diverse inorganic species composite interphase at the anode improves mec

SUBMITTER: Li J 

PROVIDER: S-EPMC12617479 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature