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扩散应力诱导的锂离子电池失效机理研究进展
王亚楠1,2,3(),李华1,2,3,王正坤1,厉青峰1,练晨1,何鑫1
Progress on Failure Mechanism of Lithium Ion Battery Caused by Diffusion Induced Stress
WANG Yanan1,2,3(),LI Hua1,2,3,WANG Zhengkun1,LI Qingfeng1,LIAN Chen1,HE Xin1

图12. (a)硅双层电极发生开裂形成硅岛(上), 以及受到集流体约束的硅岛双层电极模型(下)[73]; (b)具有初始缺陷的硅岛双层电极在锂化后的扩散应力分布, 初始缺陷的长、短轴的长度比分别为0.2, 0.4, 0.6, 0.8和1[75]

Fig. 12. (a) Double-layer silicon electrode cracks to form silicon islands (above), and double-layer electrode model of a silicon island constrained by a current collector (below)[73]; (b) Diffusion-induced stress distribution of the double-layer electrodes of silicon islands with initial defects after lithiation, the length ratios of the long and short axes of the initial defects are 0.2, 0.4, 0.6, 0.8 and 1, respectively[75]