Physical Essentials of Rotating Complex Impedance Diagram in Some Electrochemical Systems

Authors

Bing-Liang Wu, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China;Follow

Abstract

The essential of the rotation of complex impedance diagram in some electrochemical systems is discussed. It is attributing to that the electrochemical capacitance usual is not simple real capacitor but must be complex number capacitance. As the examples: 1, the metal/support electrolyte electrode in the ideal polarization condition, the capacitance must be that of the electrochemical double layer and represents complex number properties. Its complex impedance diagram was not a line parallel to imaginary axis but rotated clockwise α=arctgC"/C'. 2, In the case of insertion/desertion electrodes, the capacitance must be that of the solid electrolyte interphase (SEI). The rotation of impedance diagram also was attributing to the complex number properties of the capacitance of SEI membrane. The capacity and the rotation angle may be used to characterize the electric and the structure properties of the SEI.

Graphical Abstract

Keywords

alternating current impedance, rotation of complex impedance diagram, complex capacitance, constant phase element, solid electrolyte interphase

DOI Link

https://doi.org/10.61558/2993-074X.2101

Publication Date

2013-02-28

Online Available Date

2012-06-05

Revised Date

2012-05-06

Received Date

2012-03-23

Recommended Citation

Bing-Liang Wu. Physical Essentials of Rotating Complex Impedance Diagram in Some Electrochemical Systems[J]. Journal of Electrochemistry, 2013 , 19(1): 79-82.
DOI: 10.61558/2993-074X.2101
Available at: https://jelectrochem.xmu.edu.cn/journal/vol19/iss1/8