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Poly(arylene ether)s with Pendant Perfluoroalkyl Sulfonic Acid Groups as Proton-Exchange Membrane Materials

✍ Scribed by Hossein Ghassemi; David A. Schiraldi; Thomas A. Zawodzinski; Steven Hamrock

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
385 KB
Volume
212
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

New membranes were prepared and evaluated as polymer electrolytes for PEMFCs. Polymers with PSU in the main chain and –C(O)(CF~2~)~3~SO~3~H in the side chain (PSU‐PSA) were synthesized by substitution of PSU‐Li and SFBF, followed by treatment with aqueous potassium hydroxide then sulfuric acid. The proton conductivity of PSU‐PSA with an ion exchange capacity (IEC) of 1.12 mmol · g^−1^ was 0.091 S · cm^−1^ at 80 °C under 100% relative humidity. A hydrogen/air PEMFC test of PSU‐PSA with an IEC value of 1.12 mmol · g^−1^ produced a maximum power output of 0.265 W · cm^−2^. A DMA measurement revealed that PSU‐PSA had an α‐relaxation temperature around 196 °C which is higher than the value reported for Nafion. magnified image

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