Physics-based lithium ion silver vanadium oxide cathode model

A cathode half cell physics-based model for a St. Jude Medical fabricated silver vanadium oxide (SVO) cathode coin cell battery was constructed. The model is based on a single particle Fick's second law approach with the open-circuit potential modeled with a Redlich–Kister equation. By assuming that lithium ions intercalate only through the ends of the cuboid SVO particles, the model is able to predict accurately the discharge profile of experimental cathode half cell coin cells.

► We model Li-SVO cathode system to account for mass transfer effects. ► We use Redlich–Kister equation to model open-circuit potential profile. ► Assume limiting case where lithium ions intercalate only at ends of SVO particles. ► Determine effects of changing particle length on model results. ► Model shown to have improved accuracy over model from literature.