Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 14, Pages 5124-5130Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00558a
Keywords
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Funding
- Engineering and Physical Science Research Council [EP/H025340/1, EP/I004882/1]
- Comunidad Autonoma de Madrid project RESTOENE [S2009/ENE-1734]
- US DOE [DE-SC0010531]
- EPSRC [EP/I004882/1, EP/H025340/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H025340/1, EP/I004882/1] Funding Source: researchfish
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A novel alkaline exchange ionomer (AEI) was prepared from the radiation-grafting of vinylbenzyl chloride (VBC) onto poly(ethylene-co-tetrafluoroethylene) [ETFE] powders with powder particle sizes of less than 100 mm diameter. Quaternisation of the VBC grafted ETFE powders with trimethylamine resulted in AEIs that were chemically the same as the ETFE-based radiation-grafted alkaline anion exchange membranes (AAEM) that had been previously developed for use in low temperature alkaline polymer electrolyte fuel cells (APEFC). The integration of the AEI powders into the catalyst layers (CL) of both electrodes resulted in a H-2/O-2 fuel cell peak power density of 240 mW cm(-2) at 50 degrees C (compared to 180 mW cm(-2) with a benchmark membrane electrode assembly containing identical components apart from the use of a previous generation AEI). This result is promising considering the wholly un-optimised nature of the AEI inclusion into the catalyst layers.
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