锂电池研究中的EIS实验测量和分析方法

Experimental measurement and analysis methods of electrochemical impedance spectroscopy for lithium batteries

电化学阻抗谱是一种重要的电化学测试方法,在电化学领域尤其是锂离子电池领域具有广泛的应用,如电导率、表观化学扩散系数、SEI的生长演变、电荷转移及物质传递过程的动态测量。本文介绍了电化学阻抗谱的基本原理、测试方法、测试注意事项、常用电化学阻抗测量设备及测试流程,并结合实际案例,具体分析了电化学阻抗谱在锂离子电池中的应用。

Electrochemical impedance spectroscopy（EIS） is an important electrochemical measurement method.It is widely used in the field of electrochemistry,especially in lithium ion batteries,such as measuring the electrical conductivity,apparent chemical diffusion coefficient,growth and evolution of SEI,charge transfer and the mass transfer process.This paper mainly focused on the basic principle of electrochemical impedance spectroscopy（EIS）,the testing methods,the matters needing attention and the equipment used in the electrochemical impedance measurement.Finally,the application of the electrochemical impedance spectroscopy in the lithium ion battery is introduced in a practical case.