Simulation of Li3HoCl6 Solid-state Lithium Batteries Based on COSMOL Multiphysics

Abstract

The rapid development of portable smart devices and electric vehicles is placing greater demands on the energy density and safety of rechargeable secondary batteries. Lithium-ion batteries using the Solid State Electrolyte (SSE) are considered to be the most promising direction to achieve these goals. Among the latest electrolyte developments, chloride solid electrolytes have attracted much attention due to their physicochemical properties such as high ionic conductivity, ease of deformation and oxidative stability. In this paper, a one-dimensional model of a solid-state Li3HoCl6 battery is proposed based on COSMOL Multiphysics multi-physics field simulation software, and the charge-discharge curves and lithium-ion concentration variation curves at different discharge rates are obtained. The results show that the battery has a stable potential and relatively high-capacity density at low C rates (1.8C~14.4C). Therefore, it has application values at low currents and space for improvement at high currents.