Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple

The energy efficiency of vanadium redox flow batteries (VRFB) greatly depends on the electrochemical performance of the electrodes that constitute these devices, so it is essential to develop more efficient electrode materials with optimized structure and physicochemical properties. Carbon-based fel...

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Authors: García-Alcalde, Laura, González Arias, Zoraida, Barreda García, Daniel, Rocha, Victoria G., Blanco Rodríguez, Clara, Santamaría Ramírez, Ricardo
Format: article
Status:Published version
Publication Date:2021
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::1787d681fe82432ac1f8b7bc33063f3d
Online Access:http://hdl.handle.net/10261/270827
https://api.elsevier.com/content/abstract/scopus_id/85114835004
Access Level:Open access
Keyword:Electrophoretic deposition
Electro-oxidation
Carbon felts
Nanocarbons
Vanadium redox couples
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spelling Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox coupleGarcía-Alcalde, LauraGonzález Arias, ZoraidaBarreda García, DanielRocha, Victoria G.Blanco Rodríguez, ClaraSantamaría Ramírez, RicardoElectrophoretic depositionElectro-oxidationCarbon feltsNanocarbonsVanadium redox couplesThe energy efficiency of vanadium redox flow batteries (VRFB) greatly depends on the electrochemical performance of the electrodes that constitute these devices, so it is essential to develop more efficient electrode materials with optimized structure and physicochemical properties. Carbon-based felts are commonly used as electrodes in such devices due to their high chemical stability in acid media, high electrical conductivity and their three-dimensional structure. However, they show low reversibility and electrocatalytic activity, especially for the VO2+ / VO2+ redox couple. In the quest for improving the electrochemical behaviour of carbon-based felts, it has been proposed to modify them with functionalized carbon nanotubes or graphene oxide by electrophoretic deposition. To elucidate if the improvements achieved on these electrodes can be really ascribed to the presence of the carbon nanomaterials or to the oxidation undergone by the fibers during this treatment, the electro-oxidation of a pristine rayon-based graphitized carbon felt was performed in parallel. The electro-oxidized felt exhibits the best behaviour, suggesting that the improved performance obtained for the electrodes modified with nanocarbons are mainly influenced by the oxidation of the fibers.The authors would like to acknowledge the support from the Spanish Research Agency AEI/PID2019-104028RB-100, the Principality of Asturias Research Council (PCTI) through EU (FEDER) IDI/2018/000121 and CSIC (PTI FlowBat: 201980E101). V.G Rocha would like to thank the Spanish Government (Ramón y Cajal fellowship, RYC2018-024404-I).Peer reviewedElsevierAgencia Estatal de Investigación (España)Principado de AsturiasGonzález Arias, Zoraida [0000-0001-8932-3671]García Rocha, Victoria [0000-0001-6125-8556]Blanco Rodríguez, Clara [0000-0002-0922-1980]Santamaría Ramírez, Ricardo [0000-0001-9818-6998]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/270827https://api.elsevier.com/content/abstract/scopus_id/85114835004reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésApplied Surface Sciencehttps://doi.org/10.1016/j.apsusc.2021.151095Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::1787d681fe82432ac1f8b7bc33063f3d2026-05-22T06:33:51Z
dc.title.none.fl_str_mv Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple
title Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple
spellingShingle Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple
García-Alcalde, Laura
Electrophoretic deposition
Electro-oxidation
Carbon felts
Nanocarbons
Vanadium redox couples
title_short Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple
title_full Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple
title_fullStr Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple
title_full_unstemmed Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple
title_sort Unraveling the relevance of carbon felts surface modification during electrophoretic deposition of nanocarbons on their performance as electrodes for the VO2+/VO2+ redox couple
dc.creator.none.fl_str_mv García-Alcalde, Laura
González Arias, Zoraida
Barreda García, Daniel
Rocha, Victoria G.
Blanco Rodríguez, Clara
Santamaría Ramírez, Ricardo
author García-Alcalde, Laura
author_facet García-Alcalde, Laura
González Arias, Zoraida
Barreda García, Daniel
Rocha, Victoria G.
Blanco Rodríguez, Clara
Santamaría Ramírez, Ricardo
author_role author
author2 González Arias, Zoraida
Barreda García, Daniel
Rocha, Victoria G.
Blanco Rodríguez, Clara
Santamaría Ramírez, Ricardo
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
Principado de Asturias
González Arias, Zoraida [0000-0001-8932-3671]
García Rocha, Victoria [0000-0001-6125-8556]
Blanco Rodríguez, Clara [0000-0002-0922-1980]
Santamaría Ramírez, Ricardo [0000-0001-9818-6998]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Electrophoretic deposition
Electro-oxidation
Carbon felts
Nanocarbons
Vanadium redox couples
topic Electrophoretic deposition
Electro-oxidation
Carbon felts
Nanocarbons
Vanadium redox couples
description The energy efficiency of vanadium redox flow batteries (VRFB) greatly depends on the electrochemical performance of the electrodes that constitute these devices, so it is essential to develop more efficient electrode materials with optimized structure and physicochemical properties. Carbon-based felts are commonly used as electrodes in such devices due to their high chemical stability in acid media, high electrical conductivity and their three-dimensional structure. However, they show low reversibility and electrocatalytic activity, especially for the VO2+ / VO2+ redox couple. In the quest for improving the electrochemical behaviour of carbon-based felts, it has been proposed to modify them with functionalized carbon nanotubes or graphene oxide by electrophoretic deposition. To elucidate if the improvements achieved on these electrodes can be really ascribed to the presence of the carbon nanomaterials or to the oxidation undergone by the fibers during this treatment, the electro-oxidation of a pristine rayon-based graphitized carbon felt was performed in parallel. The electro-oxidized felt exhibits the best behaviour, suggesting that the improved performance obtained for the electrodes modified with nanocarbons are mainly influenced by the oxidation of the fibers.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/270827
https://api.elsevier.com/content/abstract/scopus_id/85114835004
url http://hdl.handle.net/10261/270827
https://api.elsevier.com/content/abstract/scopus_id/85114835004
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Applied Surface Science
https://doi.org/10.1016/j.apsusc.2021.151095
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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