Proton exchange membranes based on hydrophilic-hydrophobic multiblock copolymers using different hydrophobic oligomer

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Although sulfonated aromatic polymers are thought to be one of the promising materials for proton exchange membranes, most of them suffer from significant drop of proton conductivity with decrease in humidity, which causes poor cell performance under partially hydrated condition. In this study, to improve proton conduction at low hydration level, two different multiblock copolymer membranes based on different hydrophobic oligomers are prepared and their hydrophilic/hydrophobic phase-separated morphology is examined. Both multiblock copolymer membranes show better developed phase separation than the random copolymer membrane. Multiblock copolymer having more hydrophobic oligomer exhibits better interconnection between hydrophilic channels than that having less hydrophobic oligomer. This can lead to an improvement of both proton conductivity and cell performance under partially hydrated condition. Copyright (C) 2010, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2011-03
Language
English
Article Type
Article
Keywords

POLY(ARYLENE ETHER SULFONE); FUEL-CELLS; COMPOSITE MEMBRANES; HYDROGEN; SYSTEMS

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.36, no.6, pp.3956 - 3964

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2010.12.011
URI
http://hdl.handle.net/10203/100633
Appears in Collection
CBE-Journal Papers(저널논문)
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