The Impedance of an Electrode Coated by a Resistive Film with a Graded Thickness - Sorbonne Université Access content directly
Journal Articles Electrochemical and Solid-State Letters Year : 2008

The Impedance of an Electrode Coated by a Resistive Film with a Graded Thickness

Abstract

The impedance of a rectangular electrode coated by a resistive film, the local thickness of which varies along the electrode length, is calculated considering a local capacity of each surface element inversely proportional to local film thickness and different cases for film resistance. Experimental model systems are obtained by anodizing niobium or tantalum rectangular sheets. The impedance of the coated electrode, in agreement with the calculations, shows a minimum in the plot of the ohmic resistance corrected phase angle vs frequency and cannot be accurately modeled by a constant phase element.

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Dates and versions

hal-04136177 , version 1 (21-06-2023)

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Sandro Cattarin, Nicola Comisso, Marco Musiani, Bernard Tribollet. The Impedance of an Electrode Coated by a Resistive Film with a Graded Thickness. Electrochemical and Solid-State Letters, 2008, 11 (6), pp.C27-C30. ⟨10.1149/1.2901163⟩. ⟨hal-04136177⟩
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