Journal of Industrial and Engineering Chemistry, Vol.70, 290-298, February, 2019
The improved electrochemical performance of vanadium redox flow battery by decorating functionalized mesoporous carbon catalyst with three-dimensional interconnected network
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Mesoporous carbon with an interconnected pore network containing oxygen functional groups (MC-Oxy) is proposed as a promising electrocatalyst for vanadium redox
flow batteries (VRFBs). Abundant oxygen functional groups in introduced through an acidic treatment with a mixed solution of HNO3 and H2SO4 (1:3 v/v ratio). The electrochemical reactivity of MC-Oxy toward the VO2+/VO2 + redox reaction is effectively improved. Consequently, VRFB cell assembled with carbon felt containing MC-Oxy exhibits an outstanding energy efficiency compared to the bare carbon felt. This improvement is attributed mainly to the action of the MC-Oxy as an electrocatalyst toward the redox reaction of VO2+/VO2 + redox couples.
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