Alcohol-soluble, sulfonated poly(arylene ether)s: Investigation of hydrocarbon ionomers for proton exchange membrane fuel cell catalyst layers

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DOIResolve DOI: http://doi.org/10.1149/2.0251506jes
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TypeArticle
Journal titleJournal of the Electrochemical Society
ISSN0013-4651
Volume162
Issue6
PagesF513F518
SubjectCatalysts; Ethers; Fuel cells; Hydrocarbons; Ionomers; Alcohol soluble; Catalyst coated membranes; Electrochemical surface area; Fuel cell performance; High boiling solvents; Hydrocarbon ionomers; Polar aprotic solvent; Polyarylene ethers; Proton exchange membrane fuel cells (PEMFC)
AbstractNovel sulfonated poly(arylene ether)s, characterized as being highly sterically encumbered, were synthesized for investigation as the ionomer in proton exchange membrane fuel cell (PEMFC) catalyst layers. Catalyst-coated membranes were prepared via their incorporation into alcohol-based catalyst inks, devoid of the high-boiling, polar aprotic solvents typically required for hydrocarbon-based ionomer inks. Catalyst layers thicknesses increased from 8.5 to 9.1 μm when the hydrocarbon ionomer loading was increased from 20 to 40 wt%, but resulted in a 77% loss in pore volume for fully hydrated electrodes. The catalyst layers possessed similar electrochemical surface areas and net ionic conductivity, yet catalyst layers containing 20 wt% ionomer yielded the highest overall fuel cell performance and considerably outperformed catalyst layers prepared from inks that contained high-boiling solvents.
Publication date
PublisherThe Electrochemical Society
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Energy, Mining and Environment; Construction
Peer reviewedYes
NPARC number21275639
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Record identifier437b2724-444e-4159-90d7-c4877ee2f24f
Record created2015-07-14
Record modified2016-05-09
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