期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 5, 期 9, 页码 8584-8597出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ee22466f
关键词
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资金
- UK's Engineering and Physical Sciences Research Council (EPSRC) [EP/H025340/1, EP/I004882/1]
- University of Surrey
- EPSRC [EP/H025340/1, EP/I004882/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H025340/1, EP/I004882/1] Funding Source: researchfish
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 degrees 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 degrees 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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