Electrolyte Contribution on Solid-Electrolyte Interphase (SEI) Evolution in Graphite Anodes under Rapid Cycling.

ABSTRACT: In this work, we investigate the influence of lithium salt concentration (LiFSI, lithium bis(fluorosulfonyl)imide) and ionic liquid (IL) composition on the performance and interfacial stability of high-rate energy storage devices employing lithiated graphite anodes. By varying the Li salt molarity (1-4 M LiFSI), a clear concentration-dependent differences in electrochemical response and interfacial behavior were observed, with higher LiFSI concentrations showing improved cycling stability, longer lifetimes, and attenuated growth of interfacial resistances. As the 4 M IL systems exhibited the best electrochemical performance, they were selected for a detailed investigation of the effects of IL cation identity on decomposition pathways and SEI (solid-electrolyte interphase) chemistry, partic

SUBMITTER: Gomez Rojas O 

PROVIDER: S-EPMC12679530 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature