Phenyl Acrylate-Based Cross-Linked Anion Exchange Membranes for Non-aqueous Redox Flow Batteries
ACS MATERIALS AU(2023)
Abstract
Redox flow batteries(RFBs) are of recent interest to store harvestedrenewable energy for improving grid reliability and utilization. Inthis study, we synthesized and characterized a series of phenyl acrylate-basedUV-cross-linked anion exchange membranes (AEMs) and explored the performanceof these AEMs in a model non-aqueous RFB under model conditions. Infraredspectroscopy was utilized to confirm the incorporation of ion carriersin the phenyl acrylate backbone. The electrochemical performance wascompared with the commercial Fumasep membrane Fuma-375 based on highstability in non-aqueous solvents, high permeability to the charge-carryingion, low resistance, low crossover of the redox-active molecules,and low cost. Our results show 55% total capacity retention through1000 charge/discharge cycles because of low crossover as comparedto the Fumasep commercial membrane which retained only 28% capacity.This result is promising in understanding and developing next-generationAEMs for non-aqueous RFBs and other electrochemical systems utilizingorganic solvents.
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Key words
redox flow battery,anionexchange membrane,phenyl acrylate,cross-linker
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