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Cited by 242

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Anion-exchange membranes for alkaline polymer electrolyte fuel cells: comparison of pendent benzyltrimethylammonium- and benzylmethylimidazolium-head-groups

Deavin, Oliver I., Murphy, Sam, Ong, Ai Lien, Poynton, Simon D., Zeng, Rong, Herman, Henryk, Varcoe, John R.·2012·Energy & Environmental Science

Abstract

Radiation-grafted alkaline anion-exchange membranes (AAEM) containing pendent groups with either benzyltrimethylammonium (BTM) or benzylmethylimidazolium (BMI) functionality were successfully synthesised from the same base membrane and with identical ion-exchange capacities. The conductivity of the new BMI-AAEM is comparable to the BTM-benchmark AAEM. The fuel cell performance obtained with the BMI-AAEM was, however, significantly poorer due to in situ AAEM degradation. FT-Raman spectroscopic studies on the stability of the two head-groups at 60 °C in aqueous potassium hydroxide (1 mol dm−3) indicates that the BMI-group is intrinsically less chemically stable in strongly alkaline conditions compared to the BTM-benchmark head-group. However, the stabilities of both head-groups are improved when treated at 60 °C in lower pH aqueous carbonate and bicarbonate solutions (1 mol dm−3). Contrary to a portion of the prior literature, there appears to be no real advantage in using anion-exchange polymer electrolytes containing pendent imidazolium groups in highly alkaline systems.

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Metadata

Authors
Deavin, O. I., Murphy, S., Ong, A. L., Poynton, S. D., Zeng, R., Herman, H., & Varcoe, J. R.
Venue
Energy & Environmental Science
Published
2012
Volume
5
Issue
9
Pages
8584
ISSN
  • 1754-5692 (ISSN-L)
  • 1754-5706
OpenAlex
W2150816579
Cited by
242
References
3
FWCI
18.92
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Anion-exchange membranes for alkaline polymer electrolyte fuel cells: comparison of pendent benzyltrimethylammonium- and benzylmethylimidazolium-head-groups. https://app.cochat.ai/papers/10.1039/c2ee22466f
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Deavin, O. I., Murphy, S., Ong, A. L., Poynton, S. D., Zeng, R., Herman, H., & Varcoe, J. R. (2012). Anion-exchange membranes for alkaline polymer electrolyte fuel cells: comparison of pendent benzyltrimethylammonium- and benzylmethylimidazolium-head-groups. Energy & Environmental Science. https://doi.org/10.1039/c2ee22466f

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