Degradation of a polymer exchange membrane fuel cell stack with Nafion® membranes of different thicknesses: Part I. In situ diagnosis

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2010.06.023
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TypeArticle
Journal titleJournal of Power Sources
Volume195
Issue22
Pages75947599; # of pages: 5
SubjectProton exchange membrane fuel cell; Stack; In situ; Durability; Idle conditions; Degradation
AbstractThe durability of polymer exchange membrane (PEM) fuel cells, under a wide range of operational conditions, has been attracting intensive attention, as durability is one of the largest barriers for commercialization of this promising technology. In the present work, membrane electrode assembly (MEA)degradati on of a four-cell stack with Nafion membranes of different thicknesses, including N117, N115, NR212, and NR211, was carried out for 1000 h under idle conditions. By means of several on-line electrochemical measurements, the performance of the individual cells was analyzed at different times during the degradation process. The results indicate that the cells with thinner membranes have a lower open circuit voltage (OCV) due to the higher fuel crossover. Before degradation, the thickness of the membranes correlates with performance of the cell. However, with the advancement of degradation, the performance of cells with thinner membranes degraded much faster than those with thicker membranes, especially after 800 hof operation. The fast performance degradation for thinner membranesis evident by a dramatic increase in hydrogen crossover indicating membrane thinning or pinhole formation.
Publication date
LanguageEnglish
AffiliationNRC Institute for Fuel Cell Innovation; National Research Council Canada
Peer reviewedYes
NPARC number16910707
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Record identifier5f8a3ff8-68db-408b-ac51-d608cccf1b01
Record created2011-02-25
Record modified2016-05-09
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