Symmetric Vs Asymmetric Imide Anion Decomposition Pathways And Their Influence On Solid Electrolyte Interphase Stability For Si Anodes.

ABSTRACT: A sturdy solid electrolyte interphase (SEI) is imperative for extending the calendar-life of Si anodes in lithium-ion batteries (LIBs). However, carbonate electrolytes form unstable interphases, hindering their practical implementation. Alternatively, fluorinated sulfonylimide (FSI^-/TFSI^-) based ionic liquid (IL) electrolytes, coupled with Li-imide salts, enable anion-derived SEI formation, thereby enhancing capacity retention. However, the functional role of these anions in directing SEI formation and evolution within IL-based systems is poorly understood. Moreover, the mechanistic interplay between the decomposition pathways of symmetric and asymmetric anions in governing interfacial chemistry remains elusive. Herein, we investigate the chemistry and morphology of S

SUBMITTER: Sankaran A 

PROVIDER: S-EPMC12828446 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature