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Performance Enhancement of Reduced Graphene Oxide‐Modified Carbon Electrodes for Vanadium Redox‐Flow Systems
Author(s) -
Chakrabarti Barun,
Nir Dan,
Yufit Vladimir,
Tariq Farid,
RubioGarcia J.,
Maher Robert,
Kucernak Anthony,
Aravind P.V.,
Brandon Nigel
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600402
Subject(s) - graphene , electrode , electrophoretic deposition , oxide , redox , materials science , vanadium , deposition (geology) , chemical engineering , substrate (aquarium) , inorganic chemistry , analytical chemistry (journal) , chemistry , nanotechnology , metallurgy , organic chemistry , coating , paleontology , oceanography , sediment , geology , engineering , biology
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 VO 2 + /VO 2+ reaction is also observed (from impedance measurements) in modified samples in comparison to untreated CP electrodes.