Two-Dimensional Simulation of All-Solid-State Lithium-ion Batteries

L. Tong [1],
[1] Keisoku Engineering System Co., Ltd., Chiyoda-ku, Tokyo, Japan

There is great interest in developing all-solid-state lithium-ion batteries. They are ideal micro-power sources for many applications in portable electronic devices, electric vehicles and biomedical engineering. It is known that all-solid-state lithium-ion batteries are often fabricated by thin film methods, with thicknesses in the range of a few micrometers. Since porous electrodes are not used, all electrochemical reactions take place on the interface between the electrolyte and solid electrode domains. In this work, we present a simulation research based on a two-dimensional model of all-solid-state lithium-ion batteries using the COMSOL Multiphysics® software. The calculation of current density and the transport of lithium species are coupled. The charge/ discharge curves (cell voltage vs. time) for various discharge rates are obtained and analyzed.