Development of a Simple and Rapid Diagnostic Method for Polymer-Electrolyte Fuel Cells
Date Published |
01/2018
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Publication Type | Journal Article
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Authors | |
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DOI |
10.1149/2.0011806jes
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Abstract |
A simple and fast diagnostic tool has been developed for analyzing polymer-electrolyte fuel-cell degradation. The tool is based on analyzing changes in polarization curves of a cell over its lifetime. The shape of the polarization-change curve and its sensitivity to oxygen concentration are found to be unique for each degradation pathway based on analysis from a detailed 2-D numerical model of the cell. Using the polarization-change curve methodology, the primary mechanism for degradation (kinetic, ohmic, and/or transport related) can be identified. The technique is applied to two sets of data to explain performance changes after two different cells undergo voltage-cycling accelerated stress test, where it is found that changes are kinetic and then ohmic or transport in nature depending on the cell type. The diagnostic tool provides a simple method for rapid determination of primary degradation mechanisms. Areas for more detailed future investigations are also summarized. |
Journal |
Journal of The Electrochemical Society
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Volume |
165
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Year of Publication |
2018
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Issue |
6
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Pagination |
F3007 - F3014
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ISSN Number |
0013-4651
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Short Title |
J. Electrochem. Soc.
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