Performance enhancement of reduced graphene oxide-modified carbon electrodes for vanadium redox-flow systems

B. Chakrabarti, D. Nir, V Yufit, F Tariq, J. Rubio-Garcia, R. Maher, A. Kucernak, Aravind Purushothaman Vellayani, N. Brandon

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Abstract

Reduced graphene oxide (rGO) suspended in an N,N′-dimethylformamide (DMF) solvent underwent electrophoretic deposition (EPD) on carbon paper (CP) electrodes. X-ray computed micro-tomography (XMT) indicates a 24 % increase in the specific surface area of CP modified with rGO in comparison to the untreated sample. Furthermore, XMT confirms that the deposition also penetrates into the substrate. Raman analysis shows that the rGO deposited is more amorphous than the CP electrode. A significant reduction in charge-transfer resistance of the VO2+/VO2+ reaction is also observed (from impedance measurements) in modified samples in comparison to untreated CP electrodes.
Original languageEnglish
Pages (from-to)194 - 200
JournalChemElectroChem
Volume4
Issue number1
DOIs
Publication statusPublished - 2017

Keywords

  • cyclic voltammetry
  • electrophoresis
  • fuel cells
  • graphene
  • surface analysis

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    Chakrabarti, B., Nir, D., Yufit, V., Tariq, F., Rubio-Garcia, J., Maher, R., Kucernak, A., Purushothaman Vellayani, A., & Brandon, N. (2017). Performance enhancement of reduced graphene oxide-modified carbon electrodes for vanadium redox-flow systems. ChemElectroChem, 4(1), 194 - 200. https://doi.org/10.1002/celc.201600402