Polymer electrolyte membrane fuel cell contamination: Testing and diagnosis of toluene-induced cathode degradation

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2008.07.006
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TypeArticle
Journal titleJournal of Power Sources
Volume185
Issue1
Pages272279; # of pages: 8
SubjectPEM fuel cells; Air impurity; Toluene contamination; Electrode kinetics; Mass transfer
AbstractThe effects of toluene contamination on the performance of polymer electrolyte membrane (PEM) fuel cells were investigated, using various levels of toluene concentration in the air streams, under different operational conditions and with different catalyst loadings. Constant-current polarization and electrochemical impedance spectroscopy (EIS) were conducted to analyze the poisoning behaviour of toluene. The severity of the contamination effect increased with an increase in both the current density and the toluene concentration, but decreased with an increase in both the relative humidity (RH) and the cathode-side Pt loading. The toluene-poisoned fuel cell could not be fully recovered by replacing toluene-contaminated air with pure air. EIS measurements revealed that both kinetic resistance and mass transfer resistance increased as a result of toluene contamination, while membrane resistance remained unchanged. However, the increase in kinetic resistance was a major contributor to cell performance degradation.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Fuel Cell Innovation
Peer reviewedNo
NPARC number8900992
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Record identifierddce78b8-720b-4d9b-917d-f06d829a1283
Record created2009-04-22
Record modified2016-05-09
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