A mathematical model of stress generation and fracture in lithium manganese oxide

被引：353

作者：

Christensen, J ^{[1
]}

Newman, J ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2006年 / 153卷 / 06期

关键词：

D O I：

10.1149/1.2185287

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Fracture of LiyMn2O4 is predicted with a numerical model that calculates the stress generated in spherical particles due to lithium intercalation along the 4-V plateau and phase change along the 3-V plateau. In the former case, fracture is probable at the rates typical of high-power applications, while in the latter case, the probability of fracture is linked not to the discharge rate or particle size, but to the LiMn2O4/Li2Mn2O4 phase ratio. The two-phase material should fracture immediately upon lithium extraction. The effects of variation in thermodynamic factor, diffusion coefficient, and lattice parameter are examined in detail. (C) 2006 The Electrochemical Society.

引用

页码：A1019 / A1030

页数：12

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