RuO2 modification of graphene oxide-multiwalled carbon nanotubes as excellent positive electrode for vanadium redox flow battery

Mir Ghasem Hosseini (Corresponding Author), Seyedabolfazl Mousavihashemi

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

Vanadium redox flow batteries (VRFBs) are one of the most appealing candidates for large-scale energy storage, and hence, they have to get more developed to overwhelm commercialization obstacles such as high price of membrane and vanadium electrolyte. In this work, we have synthesized “graphene oxide (GO)-multiwalled carbon nanotubes (MWCNT)-RuO2 ” as positive electrode material for VRFBs. The mixture of GO and MWCNT was prepared, and then, it was modified with RuO2 nanoparticles. The FE-SEM and XRD were utilized to investigate the morphology and structure of as-prepared electrocatalyst materials. Cyclic voltammetry and electrochemical impedance spectroscopy techniques were used to look into the electrochemical performance of as-prepared electrocatalyst for vanadium IV/V redox couple reaction. GO-MWCNT-RuO2 reduced the charge transfer resistance from 223.20 Ω (MWCNT) and 186.60 Ω (GO-MWCNT) to 94.25 Ω. The voltammograms showed that peak separation potential was decreased from 605 mV for MWCNT down to 134 mV for GO-MWCNT-RuO2 .

Original languageEnglish
Pages (from-to)1215-1222
JournalIonics
Volume25
Issue number3
DOIs
Publication statusPublished - 4 Mar 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • Electrocatalyst
  • Graphene oxide
  • Multiwalled carbon nanotube
  • Ruthenium oxide
  • Vanadium redox flow battery

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