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电化学(中英文) ›› 2012, Vol. 18 ›› Issue (4): 306-309.  doi: 10.61558/2993-074X.2921

• 化学电源近期研究专辑(武汉大学 杨汉西教授主编) • 上一篇    下一篇

LiFePO4电极放电曲线的阻抗模拟

 王铭1, 李建军1, 何向明1*, 白鹏2, 吴扞3, 万春荣1, 田光宇2   

  1. 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33068
  • 收稿日期:2011-11-24 修回日期:2012-01-19 出版日期:2012-08-28 发布日期:2012-02-01
  • 通讯作者: 何向明 E-mail:hexm@tsinghua.edu.cn
  • 基金资助:

    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

Discharge Curve Fitting of LiFePO4 Based on Impedance Model

 WANG  Ming1, LI  Jian-Jun1, HE  Xiang-Ming1*, BAI  Peng2, WU  Gan3, WAN  Chun-Rong1, TIAN  Guang-Yu2   

  1. 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
  • Received:2011-11-24 Revised:2012-01-19 Published:2012-08-28 Online:2012-02-01
  • Contact: HE Xiang-Ming E-mail:hexm@tsinghua.edu.cn

摘要: 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.

关键词: LiFePO4, 阻抗模型, 模拟

Abstract: 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.

Key words: LiFePO4, impedance model, fitting

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