Journal
ENERGY TECHNOLOGY
Volume 2, Issue 8, Pages 685-691Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201402011
Keywords
proton conductivity; fuel cells; Nafion; polymers; proton exchange membranes
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Funding
- National University of Singapore
- National Research Foundation of Singapore
- Singapore Ministry of Education
- National Natural Science Foundation of China [21233006]
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A novel molecular structural design of rigid-flexible hybrid polymer backbone is proposed for proton-exchange membranes (PEMs) with the objective to preserve the material longevity by enhancing the dimensional stability. The effect of the rigid-flexible hybrid backbone is demonstrated based on performance tests for a series of non-fluorinated polyamide-sulfonimide proton conductors, among which the conductivity of the rigid-flexible hybrid structural PEM is nearly 100% higher than the rigid PEM with almost the same ion-exchange capacity (IEC). The dimensional and mechanical stabilities of these PEMs are better than those of Nafion membranes. The measured conductivity of the rigid-flexible hybrid structural PEM is on the order of 10(-2) Scm(-1).
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