Journal
ACS APPLIED ENERGY MATERIALS
Volume 1, Issue 5, Pages 1883-1887Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.8b00438
Keywords
anion-exchange membranes; alkaline membrane fuel cells; water electrolyzers; vinylbenzyl chloride; benzyltrimethylammonium; 1,6-elimination; ultrasound-assisted grafting; radiation-induced grafting
Funding
- EPSRC [EP/M005933/1]
- EPSRC [EP/M005933/1] Funding Source: UKRI
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Benzyltrimethylammonium-type anion-exchange polymers are common in alkali membrane fuel cells and water electrolyzers, but they suffer from degradation under alkaline conditions. Radiation-grafted anion-exchange membranes exhibit an alkali stability enhancement when made using noncommercial meta-only vinylbenzyl chloride (VBC) monomer, compared to the use of commercially available para-only or meta/para-mixed VBC isomers. We hypothesize a mechanism on why the use of meta-VBC eliminates AEM degradation via chain scission.
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