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Numerical Impedance Analysis of Groove Electrodes In Aconducting Solution

Published online by Cambridge University Press:  10 February 2011

H. Matsui  and
A. Kunugi
H. Matsui
Affiliation:
Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima, Minamijosanjima Tokushima, 770 Japan
A. Kunugi
Affiliation:
Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima, Minamijosanjima Tokushima, 770 Japan
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Abstract

The effect of electrode surface unevenness on electrode impedance was examined at rectangular groove electrodes by numerically solving the Laplace equation. CPE behavior appeared for the double-layer charging at considerably large groove electrodes in the absence of outer solution layer at high frequencies. This behavior originated from the current concentration to the upper portions of the groove. In the presence of an outer solution layer, the current concentration was greatly weakened by the series connection of solution resistance, resulting in the disappearance of CPE behavior. The real part of the impedance at high frequencies was not additive in the presence of exposed electrode surfaces outside the groove. The origin of no impedance additivity was discussed based on equipotential-amplitude data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 411: Symposium T – Electricaly-Based Microstructural Characterization , 1995 , 243
Copyright
Copyright © Materials Research Society 1996

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References

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