The improved electrochemical performance of vanadium redox flow battery by decorating functionalized mesoporous carbon catalyst with three-dimensional interconnected network

Functionalized mesoporous carbon (MC) with interconnected pore structure was developed as a new catalyst for improving VRFB performance. Synergistic effect of the abundant oxygen functional groups formed on the surface and interior of the MC and interconnected pore network structure was believed to...

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Bibliographic Details
Published inJournal of industrial and engineering chemistry (Seoul, Korea) Vol. 70; pp. 290 - 298
Main Authors Suharto, Yustian, Lee, Kyubin, Kim, Ki Jae
Format Journal Article
LanguageEnglish
Published Elsevier B.V 25.02.2019
한국공업화학회
Subjects
Catalyst
Functionalized
Interconnected pores
Mesoporous carbon
VRFB
화학공학
VRFB
Functionalized
Mesoporous carbon
Catalyst
Interconnected pores
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ISSN1226-086X
1876-794X
DOI10.1016/j.jiec.2018.10.029

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Summary:Functionalized mesoporous carbon (MC) with interconnected pore structure was developed as a new catalyst for improving VRFB performance. Synergistic effect of the abundant oxygen functional groups formed on the surface and interior of the MC and interconnected pore network structure was believed to enhance the electrochemical redox reaction of VO2+/VO2+. [Display omitted] •Electrocatalyst with functionalized three-dimensional pore networks (MC-Oxy) has successfully manufactured.•Abundant oxygen functional groups present on the surface and interior of MC-Oxy were acting as active sites for VO2+/VO2+ redox reaction.•VRFB performance using MC-Oxy decorated electrode was significantly improved. 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.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2018.10.029