| 电化学阻抗谱在锂离子电池正极材料LiFePO4研究中的应用 |
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| 引用本文： | 王连亮,孙志中,伊文涛,马培华.电化学阻抗谱在锂离子电池正极材料LiFePO4研究中的应用[J].盐湖研究,2008,16(4). |
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| 作者姓名： | 王连亮 孙志中 伊文涛 马培华 |
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| 作者单位： | 1. 中国科学院青海盐湖研究所,青海,西宁,810008;中国科学院研究生院,北京,100039
2. 中国科学院青海盐湖研究所,青海,西宁,810008 |
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| 基金项目： | 青海省科技攻关项目
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| 摘 要： | 回顾了EIS的基本理论。综述了等效电路设计、锂离子扩散系数理论计算和EIS在LiFePO4研究中的具体应用。EIS在测量LiFePO4时,频率必须大于临界值才能满足EIS的线形基本条件。等效电路设计思路源于基本的Randles等效电路。锂离子扩散系数计算源于对等效电路的数理推导。EIS谱图可以定量和定性分析得到电极动力学信息与界面信息。
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| 关 键 词： | EIS 交流阻抗 LiFePO4 锂离子扩散系数 |
The Applications of EIS in the Research of LiFePO4 as the Cathode Materials of Li-ion Batteries |
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| WANG Lian-liang,SUN Zhi-zhong,YI Wen-tao,MA Pei-hua.The Applications of EIS in the Research of LiFePO4 as the Cathode Materials of Li-ion Batteries[J].Journal of Salt Lake Research,2008,16(4). |
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| Authors: | WANG Lian-liang SUN Zhi-zhong YI Wen-tao MA Pei-hua |
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| Abstract: | The paper reviewed the fundamental theory of EIS and summarized the design of equivalent circuit,the calculation of Li-ion diffusion coefficient and the application of EIS on the research of LiFePO4.The impendence response of LiFePO4 satisfied the criteria of linearity and time invariance above a critical frequency in the range of 1~100 MHz.The design of equivalent circuit is from the development of Randles model.The Li-ion diffusion coefficient can be calculated based on the mathematical deduction of its equivalent circuit.The information on kinetics and surface of electrodes can be analyzed qualitatively and quantitatively from EIS. |
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| Keywords: | EIS LiFePO4 |
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