Discharge model for LiFePO4 accounting for the solid solution range

被引：83

作者：

Kasavajjula, Uday S. ^{[1
]}

Wang, Chunsheng ^{[2
]}

Arce, Pedro E. ^{[1
]}

机构：

[1] Tennessee Technol Univ, Dept Chem Engn, Cookeville, TN 38501 USA

[2] Univ Maryland, Dept Chem & Biomol Engn, College Pk, MD 20742 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2008年 / 155卷 / 11期

关键词：

D O I：

10.1149/1.2980420

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A comprehensive discharge model for LiFePO4 electrode, including Li-ion diffusion in both the alpha and the beta solid solution phases, and phase transformation was developed. For the discharge model, the phase transformation, driven by the interfacial lithium concentration differences in both alpha and beta phases, was considered to be strongly dependent on the type of interface formed between the alpha and beta phases (coherent, semicoherent, and incoherent). By using the model as a tool, effects of extending the alpha and the beta solid solutions and reducing the particle size of LiFePO4 on rate performance of LiFePO4 were analyzed. The model developed in this article is applicable for predicting the discharge behavior of any other electrodes with phase transformation. (c) 2008 The Electrochemical Society.

引用

页码：A866 / A874

页数：9

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