电源技术2024，Vol.48Issue(5)：829-834,6.DOI:10.3969/j.issn.1002-087X.2024.05.008
外载对球形颗粒电极锂化过程的扩散影响
The diffusion effect of external loads on the lithiation process of spherical particle electrodes
冯超 1张锴 1郑百林1
作者信息
- 1. 同济大学航空航天与力学学院,上海 200092
- 折叠
摘要
Abstract
Lithium ion batteries are inevitably subjected to external mechanical loads,which can have a significant impact on the battery.In this paper,a chemomechnical coupled model for the lithiation process of a spherical particle electrode under external mechanical loads is established based on the theories of small deformation and linear elasticity.It is found that the influence of external stress gra-dient on diffusion process gradually increases as the diffusion processes,and the lithium ion concen-tration at the center of the sphere is lower than that at the surface of the sphere at the steady state.The positive stress gradient has an inhibitory effect on diffusion of lithium ion.For complex external loads,the lithium ion concentration shows a nonlinear and non-uniform distribution along the radial direction at the steady state.关键词
锂离子电池/外部机械载荷/球形电极/扩散诱导应力Key words
lithium ion batteries/external mechanical loads/spherical electrode/diffusion-induced stress分类
信息技术与安全科学引用本文复制引用
冯超,张锴,郑百林..外载对球形颗粒电极锂化过程的扩散影响[J].电源技术,2024,48(5):829-834,6.
