Numerical simulation of lithium‐ion battery performance considering electrode microstructure
Numerical simulation of lithium‐ion battery performance considering electrode microstructure
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DOI：
10.1002/er.3459
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发表时间：
2015-12
影响因子：
4.6
通讯作者：
M. Kespe;H. Nirschl
中科院分区：
文献类型：
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作者：
M. Kespe;H. Nirschl
开发了锂离子电池半电池的空间分辨三维微尺度模型，并将其应用于由遵循双分散粒度分布的球形颗粒组成的周期性电极微结构。周期性单胞的几何形状是通过使用周期性边界条件的离散单元模拟得出的。三种不同的颗粒排列，其中包括两个分层结构和一个混合颗粒阵列，以及三种不同的压缩率，被认为是。在研究中，阴极被假定为由LiMn2O4作为活性材料组成。发现在靠近分离器的区域中包含较小粒度的颗粒部分的分层颗粒布置特别有益于高速率应用。根据模拟结果，在电极微结构压缩时，高倍率能力降低。版权所有© 2015约翰威利父子有限公司.
A spatially resolved three‐dimensional microscale model of a lithium‐ion battery half‐cell is developed and applied to periodic electrode microstructures made up of spherical particles following a bidisperse particle size distribution. The geometries of the periodic unit cells are derived from discrete element simulations using periodic boundary conditions. Three different particle arrangements, which consist of two layered structures and one mixed particle array, as well as three different compression rates, are considered. In the study, the cathode is assumed to consist of LiMn2O4 as active material. Layered particle arrangements comprising the particle fraction of the smaller particle size in the region close to the separator are found to be beneficial especially for high‐rate applications. According to the simulation results, the high‐rate capability is reduced upon compression of the electrode microstructures. Copyright © 2015 John Wiley & Sons, Ltd.