LiFePO4电极放电曲线的阻抗模拟

王铭; 李建军; 何向明; 白鹏; 吴扞; 万春荣; 田光宇

doi:10.61558/2993-074X.2921

电化学 >

2012 , Vol. 18 >Issue 4: 306 - 309

DOI: https://doi.org/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）

LiFePO₄电极放电曲线的阻抗模拟

王铭 ,
李建军 ,
何向明 ,
白鹏 ,
吴扞 ,
万春荣 ,
田光宇

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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

网络出版日期: 2012-02-01

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

收起

Discharge Curve Fitting of LiFePO₄ Based on Impedance Model

WANG Ming ,
LI Jian-Jun ,
HE Xiang-Ming ,
BAI Peng ,
WU Gan ,
WAN Chun-Rong ,
TIAN Guang-Yu

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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 date: 2011-11-24

Revised date: 2012-01-19

Online published: 2012-02-01

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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

本文引用格式

王铭 , 李建军 , 何向明 , 白鹏 , 吴扞 , 万春荣 , 田光宇 . LiFePO₄电极放电曲线的阻抗模拟[J]. 电化学, 2012 , 18(4) : 306 -309 . DOI: 10.61558/2993-074X.2921

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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