Estimation of local relative humidity in cathode catalyst layers of PEFC

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DOIResolve DOI: http://doi.org/10.1149/1.3355233
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TypeArticle
Proceedings titleElectrochemical and Solid-State Letters
Conference216th ECS Meeting, October 4–9, 2009, Vienna, Austria
Volume13
Issue6
PagesB58B62; # of pages: 5
Subjectcatalysts; cathodes; electric impedance measurement; electrochemical electrodes; humidity; proton exchange membrane fuel cells
AbstractA simple method is presented to estimate the local relative humidity (RH) in cathode catalyst layers (CCLs) of polymer electrolyte fuel cells (PEFCs). Based on impedance measurements under different experimental conditions, this technique provides a means to estimate the average value for RH using a correlation with the catalyst layer effective proton resistance. At zero current, a fully humidified anode raises the RH inside the CCL from a nominal 30% to almost 70%. A current density of up to 0.4 A/cm2 also humidifies the cathode, while drying is observed between 0.4 and 1.0 A/cm2.
Publication date
PublisherElectrochemical Society
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Fuel Cell Innovation
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public
Peer reviewedYes
NPARC number14968149
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Record identifier1cca8afe-0591-4ac8-8a1f-cb1c9aa0604e
Record created2010-04-14
Record modified2016-05-09
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