扩散应力诱导的锂离子电池失效机理研究进展

王亚楠,李华,王正坤,厉青峰,练晨,何鑫

Progress on Failure Mechanism of Lithium Ion Battery Caused by Diffusion Induced Stress

WANG Yanan,LI Hua,WANG Zhengkun,LI Qingfeng,LIAN Chen,HE Xin

表1 单颗粒模型中影响扩散应力的因素

Table 1 Factors affecting diffusion-induced stress in a single particle model

Factor Specific interpretation Ref. Particle shape Solid sphere, hollow sphere, ellipsoid, cube, etc. [14-20] Particle size Radius/diameter, shell thickness, aspect ratio, edge length, etc. [14-20] Material properties Lithium expansion coefficient, elastic modulus, plastic deformation, strain rate, partial molar volume, medium expansion rate, lithium diffusion coefficient, etc. [10, 21-22] [28-30] Nanowires and nanotubes Slender linear or tubular structures with small diameters [11, 23-30] Coating shell Carbon coating, alumina coating, etc. [31-34] Phase separation Single- and two-phase deintercalation mechanism [34-37] Dislocation effect Microscopic defects in crystalline materials caused by local irregular arrangement of atoms [38-41] Charging and discharging conditions Ratio and strategy of charging and discharging, etc. [4, 42-44]