Galvanostatic EFM: A New Approach for Testing and Monitoring Fuel Cells

Electrochemical Frequency Modulation is a well-known technique which is mostly used for corrosion studies. It is generally performed in potentiostatic mode and allows calculating the corrosion current as well as Tafel parameters by rearranging the Butler-Volmer equation.However, no practical and the...

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Bibliographic Details
Published in:ECS transactions 2017-05, Vol.78 (1), p.2391-2406
Main Authors: Moosbauer, Dominik Johann, Zhang, Xueyuan, Yaffe, Max
Format: Article
Language:English
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Summary:Electrochemical Frequency Modulation is a well-known technique which is mostly used for corrosion studies. It is generally performed in potentiostatic mode and allows calculating the corrosion current as well as Tafel parameters by rearranging the Butler-Volmer equation.However, no practical and theoretical approach has been published so far for EFM measurements in galvanostatic mode. This technique could be especially interesting for electrochemical power systems where galvanostatic control is much more beneficial because of easier operation. In contrast, even small potential changes during potentiostatic control can lead to high currents if a system has a very low internal resistance. This can lead to irreversible damages and safety risks. This study presents galvanostatic EFM measurements with fuel cells.
ISSN:1938-5862
1938-6737
1938-6737
1938-5862
DOI:10.1149/07801.2391ecst