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Guanidimidazole-quanternized and cross-linked alkaline polymer electrolyte membrane for fuel cell application
School of Chemical and Petroleum Engineering, Dalian University of Technology, State Key Laboratory of Fine Chemicals.
School of Chemical and Petroleum Engineering, Dalian University of Technology, State Key Laboratory of Fine Chemicals.
School of Chemical and Petroleum Engineering, Dalian University of Technology, State Key Laboratory of Fine Chemicals.
School of Chemical and Petroleum Engineering, Dalian University of Technology, State Key Laboratory of Fine Chemicals.
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2016 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 501, p. 100-108Article in journal (Refereed) Published
Abstract [en]

A modified imidazole, namely guanidimidazole (GIm) was designed and synthesized as a novel quaternizing- and cross-linking agent for alkaline polymer electrolyte membrane fabrication. The resulting membrane was more alkali tolerant and swelling resistant than that quaternized purely by 1-methylimidazole owing to the enhanced resonance and cross-linking ability of GIm, the former confirmed by a LUMO (lowest unoccupied molecular orbital) energy calculation. The membrane also showed good ionic conductivity, mechanical strength and thermal stability. A H2/O2 fuel cell using the synthesized membrane showed a peak power density of 39 mW cm−2 at 50 °C. This work preliminarily demonstrates the beneficial effect of imidazole modification by both experimental and computational investigation; it provides a new cation design strategy that may potentially achieve simultaneous improvement of alkali-stability and swelling resistance of alkaline electrolyte membranes.

Place, publisher, year, edition, pages
2016. Vol. 501, p. 100-108
National Category
Other Materials Engineering
Research subject
Engineering Materials
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URN: urn:nbn:se:ltu:diva-8096DOI: 10.1016/j.memsci.2015.12.012ISI: 000368629100011Scopus ID: 2-s2.0-84954190138Local ID: 68bc4471-f971-4abd-8502-b4cdd3b93ed7OAI: oai:DiVA.org:ltu-8096DiVA, id: diva2:980986
Note
Validerad; 2016; Nivå 2; 20151210 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Gai, Fangyuan

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