A Comparative Study of Cohesive Law Shapes in Analytical Modeling of Interfacial Debonding in Lithium-Ion Battery Electrodes
A Comparative Study of Cohesive Law Shapes in Analytical Modeling of Interfacial Debonding in Lithium-Ion Battery Electrodes
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DOI：
10.1115/1.4044139
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
B. Lu;Chengqiang Ning;Yanfei Zhao;Yicheng Song;Junqian Zhang
中科院分区：
文献类型：
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作者：
B. Lu;Chengqiang Ning;Yanfei Zhao;Yicheng Song;Junqian Zhang
为了确定黏结规律形状对锂离子电池电极界面脱粘建模的影响，分别开发了基于不同黏结模型的脱粘过程分析方法。三种不同的衔接规律，即三角形、梯形和矩形规律，已被采用。为保证可比性，对不同的内聚规律，均设置了相同的内聚强度和断裂韧性。对脱粘开始时间的评估表明，只有当界面具有延性时，内聚规律的形状才会影响建模结果。估计了三角形律和矩形律在脱粘开始时的最大可能差异。对特定电极也进行了讨论。
To determine the impact of cohesive law shapes on the modeling of interfacial debonding in lithium-ion battery electrodes, analytical methods based on different cohesive models for the debonding process have been developed individually. Three different cohesive laws, namely, triangular, trapezoidal, and rectangular laws, have been employed. To ensure comparability, the cohesive strength and the fracture toughness have been set to be identical for different cohesive laws. The evaluation of debonding onset has suggested that the cohesive law shape affects the modeling results only when the interface is ductile. The largest possible difference for the triangular law and the rectangular law on the debonding onset has been estimated. A discussion for specific electrodes has also been provided.