期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 155, 期 11, 页码 A866-A874出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.2980420
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资金
- U. S. Army Communications Electronics Command [W909MY-06-C-0040]
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.
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