Development of a Simple and Rapid Diagnostic Method for Polymer-Electrolyte Fuel Cells

Development of a Simple and Rapid Diagnostic Method for Polymer-Electrolyte Fuel Cells

TitleDevelopment of a Simple and Rapid Diagnostic Method for Polymer-Electrolyte Fuel Cells
Publication TypeJournal Article
Year of Publication2018
AuthorsLalit M Pant, Zhiwei Yang, Michael L Perry, Adam Z Weber
JournalJournal of The Electrochemical Society
Volume165
Issue6
PaginationF3007 - F3014
Date Published01/2018
ISSN0013-4651
Keywordsdiagnostics, modeling, pefc
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.

DOI10.1149/2.0011806jes
Short TitleJ. Electrochem. Soc.