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

Journal article (2017)

Authors

B. Chakrabarti Imperial College London
V Yufit Imperial College London
F Tariq Imperial College London
J. Rubio-Garcia Imperial College London
R. Maher Imperial College London
A. Kucernak Imperial College London
P.V. Aravind Energy Technology - Mechanical, Maritime and Materials Engineering
N. Brandon Imperial College London
Research Group
Energy Technology (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2017 B. Chakrabarti, D. Nir, V Yufit, F Tariq, J. Rubio-Garcia, R. Maher, A. Kucernak, P.V. Aravind, N. Brandon
DOI
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https://doi.org/10.1002/celc.201600402
Graphene Electrophoresis Surface analysis Fuel cells Cyclic voltammetry
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Published Date

2017

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Energy Technology

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.