建立了磷酸铁锂（LiFePO4）电极材料放电曲线的阻抗模型，将不同倍率放电的电位分为欧姆电位降、电荷转移电位降与扩散阻抗电位降三部分，通过电极交流阻抗谱图，结合理论分析，推导出不同倍率电极电位的表达式. 通过模拟，其值与实验曲线较好地吻合.In this paper, an impedance model is developed for simulating the discharge curve of LiFePO4 cathode material. The voltage drop is divided into three parts: the Ohm voltage drop, the charge transfer voltage drop and the diffusion voltage drop. A theoretical expression has been derived to predict the discharge curves at various discharge rates. The parameters of the equation have been obtained by fitting the results of EIS measurement, and a good agreement between the fitting and the experimental data has been found at all discharge rates.国家973计划（No. 2011CB935902，No. 2011CB711202）、科技部国际合作（No. 2010DFA72760）和清华大学自主科研计划（No. 2010THZ08116，No. 2011THZ08139，No. 2011THZ01004）资助作者联系地址：1. 清华大学核能与新能源技术研究院，北京100084； 2. 清华大学汽车工程系，北京100084； 3. 台湾立凯电能科技股份有限公司，台湾 桃园33068Author's Address: 1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China; 2. Department of Automotive Engineering, Tsinghua University, Beijing 100084, China; 3. Advanced Lithium Electrochemistry Co., Ltd., Taoyuan33068, Taiwan, China通讯作者E-mail：[email protected]
