Copoly(arylene ether nitrile)s - high-performance polymer electrolytes for direct methanol fuel cells

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DOIResolve DOI: http://doi.org/10.1149/1.2799583
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TypeArticle
Journal titleJournal of the Electrochemical Society
Volume155
Issue1
PagesB21B26
Subjectdirect methanol fuel cells; electrochemical electrodes; membranes; polymer blends; polymer electrolytes; proton exchange membrane fuel cells
AbstractDirect methanol fuel cell (DMFC) performance of sulfonated (arylene ether ether nitrile) (m-SPAEEN) copolymers is reported. Low water absorption of m-SPAEEN copolymers enabled increased proton-exchange concentrations in the hydrated polymer matrix, resulting in more desirable membrane properties for DMFC applications. The membrane electrode assemblies (MEAs) using m-SPAEENs showed improved cell properties which could not be obtained by the MEAs using sulfonated polysulfone or Nafion. The DMFC performance using an optimized m-SPAEEN membrane exceeded those of the other membrane systems. For example, 265 mA/cm2 was obtained for an MEA using m-SPAEEN, compared to 230 and 195 mA/cm2 for MEAs using sulfonated polysulfone and Nafion membranes, respectively, at 0.5 V, measured under identical conditions. In the comparative evaluations, membrane thickness was selected to give methanol crossover limiting currents that were similar for each of the polymer electrolyte types. Stable cell performance during extended operation (>100 h) suggested that interfacial compatibility between m-SPAEEN and Nafion-bonded electrodes was good.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedNo
NRC number49123
NPARC number8925974
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Record identifier4027ed0f-a5a4-41b9-b228-7668f870ee1c
Record created2009-04-23
Record modified2016-05-09
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