Date of Publication:2020-01-01

Journal:Membrane Science and Technology

Volume:40

Issue:6

Page Number:104-110

ISSN:1007-8924

Key Words:"proton exchange membrane; all-vanadium redox flow batteries; coaxial electrospinning; energy efficiency"

CN:62-1049/TB

Abstract:The coaxial electrospinning method was proposed.By fiberizing the membrane materials, interconnective proton pathways could be built in the membranes to improve anti-swelling ability.The properties of the sulfonated poly(ether ether ketone)coaxial electrospun membrane was much better than that of the uniaxial electrospun membrane,with the same degree of sulfonation material.Coaxial electrospun membranes had a 41.3% reduction in swelling ratio,a 6.9% reduction in vanadium permeability,an 13.9%increase in conductivity and a 22.5%increase in proton/vanadium ions selectivity. In the single cell performance test,at a current density of 100mA/cm~2,the energy efficiency of the cell assembled with coaxial electrospun membrane reached 83.7%,which was higher than that assembled with the uniaxial electrospun membrane and Nafion211.Coaxial electrospinning method would have potential applications in all-vanadium redox flow batteries.

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