A quantitative figure of merit for battery SEI films and their use as functional solid-state electrolytes

Proceedings of the National Academy of Sciences, Volume 122, number 30, July 2025.
Interphase importance Electrolyte (SEI) is a critical layer in batteries, but its properties are often described qualitatively, leaving unclear key functional aspects. By treating the SEI as an electrolyte in the solid functional state (SSE), we …