Principle and application of electrochemical impedance spectroscopy method

doi:10.3969/j.issn.2095-4239.2014.05.013

Abstract

Abstract: Electrochemical impedance spectroscopy (EIS) method is effectively used to analyze the kinetic and diffusion features in electrode process. Based on the expermental data, the individual electrochemical step can be analyzed from the electrode polarization processes including charge transfer resistance, concentration polarization resistance, and ohmic resistance, which is a key factor for the design of an electrode. The principles of EIS including the kinetics, mass transfer performances and the distributed resistances inside the porous electrode are introduced by taking a gas diffusion electrode and redox flow batteries as the examples. Moreover, applications of EIS method on the optimization of porous electrodes are also reviewed.

Key words: electrochemical impedance spectroscopy, charge transfer resistance, mass transfer resistance, gas diffusion electrode

CLC Number:

TM911

MA Hongyun, FAN Yongsheng, HONG Weichen, WANG Baoguo. Principle and application of electrochemical impedance spectroscopy method[J]. Energy Storage Science and Technology, 2014, 3(5): 544-549.

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