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

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

Chakrabarti, B. (Imperial College London)
Nir, D.
Yufit, V (Imperial College London)
Tariq, F (Imperial College London)
Rubio-Garcia, J. (Imperial College London)
Maher, R. (Imperial College London)
Kucernak, A. (Imperial College London)
Aravind, P.V. (TU Delft Energy Technology)
Brandon, N. (Imperial College London)

2017

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.

cyclic voltammetry
electrophoresis
fuel cells
graphene
surface analysis

http://resolver.tudelft.nl/uuid:29c30b9f-67c7-4e46-a015-3de07ed23cd1

https://doi.org/10.1002/celc.201600402

2196-0216

ChemElectroChem, 4 (1), 194 - 200

Institutional Repository

journal article

© 2017 B. Chakrabarti, D. Nir, V Yufit, F Tariq, J. Rubio-Garcia, R. Maher, A. Kucernak, P.V. Aravind, N. Brandon