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Title

Experimental analysis of a degraded open-cathode PEM fuel cell stack

AuthorsStrahl, Stephan ; Gasamans, Noemí; Llorca, Jordi; Husar, Attila
KeywordsEIS
Operating conditions
Degradation
PEM fuel cell
Issue Date2013
CitationHYCELTEC 2013
AbstractThe well-known challenges to be overcome in PEM fuel cell research are their relatively low durability and high costs for the platinum catalysts. Thus, this work focuses on factors that impact durability and the links to the fuel cell performance. Therefore a degraded, open-cathode, 20-cell, PEM fuel cell stack, which was used in a laboratory test station for characterization experiments, was analyzed experimentally. Voltage transients during external perturbations, such as changing temperature, humidity and stoichiometries show that degradation affects individual cells quite differently throughout the lifetime of the stack. Electrochemical impedance spectroscopy (EIS) data presents non-reversible catalyst layer and membrane degradation of several cells. X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) are in progress in order to validate the results of the electrical analysis and elucidate catalyst and membrane degradation.
DescriptionPresentado al IV Iberian Symposium on Hydrogen, Fuel Cells and Advanced Batteries celebrado en Estoril (Portugal) del 26 al 28 de junio de 2013.
Publisher version (URL)http://www.hyceltec2013.com/
URIhttp://hdl.handle.net/10261/97455
Appears in Collections:(IRII) Comunicaciones congresos
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