Emmanuel, B. (2008) Constant phase elements, depressed arcs and analytic continuation: A critique. Journal of Electroanalytical Chemistry, 624 (1-2). pp. 14-20. ISSN 1572-6657

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The connection between the constant phase element (CPE) and the depressed arcs often observed in the Nyquist plane is critically analyzed using the analytic continuation principle enunciated earlier by the author. A major inconsistency is pointed out in a model presently used to explain these depressed arcs. A new model is advanced which removes this inconsistency and also has a clear physical basis. Aset of exact analytic results are reported which may be used as diagnostic criteria for testing experimental impedance data against different models. Several Nyquist and Bode phase plots are presented as illustrations. Experimental systems where the proposed model will be a good candidate are also discussed.

Item Type: Article
Uncontrolled Keywords: AC Impedance; Constant phase elements; Depressed ares; Analytic continuation; Nyquist plots; Bode phase plots
Subjects: Electrodics and Electrocatalysis
Depositing User: ttbdu cecri
Date Deposited: 20 Jan 2012 03:38
Last Modified: 20 Jan 2012 03:38
URI: http://cecri.csircentral.net/id/eprint/309

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