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

doi:10.1002/celc.201600402

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

Energy Technology

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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 language	English
Pages (from-to)	194 - 200
Journal	ChemElectroChem
Volume	4
Issue number	1
DOIs	https://doi.org/10.1002/celc.201600402
Publication status	Published - 2017

Keywords

cyclic voltammetry
electrophoresis
fuel cells
graphene
surface analysis

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Chakrabarti_et_al-2016-ChemElectroChemFinal published version, 1.07 MBLicence: CC BY-NC

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title = "Performance enhancement of reduced graphene oxide-modified carbon electrodes for vanadium redox-flow systems",

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.",

keywords = "cyclic voltammetry, electrophoresis, fuel cells, graphene, surface analysis",

author = "B. Chakrabarti and D. Nir and V Yufit and F Tariq and J. Rubio-Garcia and R. Maher and A. Kucernak and {Purushothaman Vellayani}, Aravind and N. Brandon",

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T1 - Performance enhancement of reduced graphene oxide-modified carbon electrodes for vanadium redox-flow systems

AU - Chakrabarti, B.

AU - Nir, D.

AU - Yufit, V

AU - Tariq, F

AU - Rubio-Garcia, J.

AU - Maher, R.

AU - Kucernak, A.

AU - Purushothaman Vellayani, Aravind

AU - Brandon, N.

PY - 2017

Y1 - 2017

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AB - 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.

KW - cyclic voltammetry

KW - electrophoresis

KW - fuel cells

KW - graphene

KW - surface analysis

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

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