Modeling of Solid-Electrolyte Interphase Growth with Non-Equilibrium Thermodynamics

This work presents a continuum model for solid-electrolyte interphase (SEI) growth in lithium-ion batteries, grounded in bulk-surface non-equilibrium thermodynamics. The model systematically treats reaction kinetics, moving interface conditions, and chemical potential functions to derive a consistent set of equations governing species concentrations, electric potential, and SEI thickness. The study demonstrates how resistive effects of the growing SEI and capacitive effects of electrochemical double layers influence cell behaviour, with validation against experimental energy and power capacity data showing realistic performance across different charging rates.