Diffusion stress modeling of micro hollow spherical shell electrode

Lithium-ion batteries (LIBs) can be used in the field of electronics widely. It is of great significance to understand the mechanism of diffusion-induced stress and then to enhance the performance of LIBs. This study aims to investigate the diffusion-induced stress (DIS) of a novel electrode material, i.e., carbon nano-spherical shell electrode. Firstly, we introduce single-phase diffusion model to analyze the influence factors on DIS under constant voltage charge and discharge conditions, to name a few, initial concentration of lithium ions and electrode size. To investigate how lithium ion concentration evolves in the spherical shell electrode, the initial concentration of lithium ions is controlled. To analyze the influence of electrode size, we alter the size and compute the corresponding radial and circumferential stress. It shows that lower initial lithium ion concentration and smaller electrode size give smaller DIS.