Journal of Industrial and Engineering Chemistry, Vol.71, 361-368, March, 2019
Anion exchange membrane prepared from imidazolium grafted poly (arylene ether ketone) with enhanced durability for vanadium redox flow battery
The anion exchange membrane was synthesized from poly(arylene ether ketone) with 1-(3-aminopropyl) imidazole pendant groups (PAEK-API) for vanadium redox flow battery. The properties of the PAEK-API membranes were compared with those of Nafion® 117 membrane. All of the synthesized membranes showed higher ion exchange capacity but lower vanadium ion permeability than Nafion® 117 membrane. Also, the membranes showed excellent chemical stability in electrolyte solution. During the 100 cycling tests, the PAEK-API 2.0 membrane showed higher coulombic and energy efficiencies than Nafion® 117 membrane without any degradation.
Keywords:Anion exchange membrane;Durability;Imidazolium group;Vanadium ion permeability;Vanadium redox flow battery