Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitors

A pristine carbon xerogel (AX) and two hybrid samples (AX-3% and AX-9%), with different graphene percentages (3 and 9 wt%), were synthesized using a fast and economical process. It was observed that graphene produces less shrinkage of the xerogel structure during synthesis. Moreover, the electrical...

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Autores: Canal Rodríguez, María, Menéndez Díaz, José Ángel, Arenillas de la Puente, Ana
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/164317
Acesso em linha:http://hdl.handle.net/10261/164317
Access Level:acceso abierto
Palavra-chave:Carbon xerogels
Graphene
Supercapacitor
Power density
Energy
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spelling Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitorsCanal Rodríguez, MaríaMenéndez Díaz, José ÁngelArenillas de la Puente, AnaCarbon xerogelsGrapheneSupercapacitorPower densityEnergyA pristine carbon xerogel (AX) and two hybrid samples (AX-3% and AX-9%), with different graphene percentages (3 and 9 wt%), were synthesized using a fast and economical process. It was observed that graphene produces less shrinkage of the xerogel structure during synthesis. Moreover, the electrical conductivity of the materials increases linearly with the percentage of graphene added. Thus, AX-9% presents an electrical conductivity 135 and 321% greater than that of AX-3% and AX, respectively. As a result of the good pore size distribution and high electrical conductivity of AX-9%, when this material is used as electrode in supercapacitors, the resistance of the cell is reduced; therefore, better power densities are obtained. However, its capacitance values are the same as those of AX-3%. The performances of these materials as electrodes in supercapacitors were evaluated taking into account the influence of their porosity and electrical conductivity. Moreover, AX and AX-9% were subjected to mild oxidation with air to study the effect of air on the porosity, electrical conductivity, and performance of these treated samples as electrodes in supercapacitors.The authors gratefully acknowledge the financial support from the Ministerio de Economía y Competitividad of Spain, MINECO (Project CTQ2014-54772-P) and the Garantía Juvenil employment plan.Peer reviewedElsevierMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201820182018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/164317reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2014-54772-Phttps://doi.org/10.1016/j.electacta.2018.04.143Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1643172026-05-22T06:33:51Z
dc.title.none.fl_str_mv Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitors
title Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitors
spellingShingle Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitors
Canal Rodríguez, María
Carbon xerogels
Graphene
Supercapacitor
Power density
Energy
title_short Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitors
title_full Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitors
title_fullStr Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitors
title_full_unstemmed Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitors
title_sort Performance of carbon xerogel-graphene hybrids as electrodes in aqueous supercapacitors
dc.creator.none.fl_str_mv Canal Rodríguez, María
Menéndez Díaz, José Ángel
Arenillas de la Puente, Ana
author Canal Rodríguez, María
author_facet Canal Rodríguez, María
Menéndez Díaz, José Ángel
Arenillas de la Puente, Ana
author_role author
author2 Menéndez Díaz, José Ángel
Arenillas de la Puente, Ana
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Carbon xerogels
Graphene
Supercapacitor
Power density
Energy
topic Carbon xerogels
Graphene
Supercapacitor
Power density
Energy
description A pristine carbon xerogel (AX) and two hybrid samples (AX-3% and AX-9%), with different graphene percentages (3 and 9 wt%), were synthesized using a fast and economical process. It was observed that graphene produces less shrinkage of the xerogel structure during synthesis. Moreover, the electrical conductivity of the materials increases linearly with the percentage of graphene added. Thus, AX-9% presents an electrical conductivity 135 and 321% greater than that of AX-3% and AX, respectively. As a result of the good pore size distribution and high electrical conductivity of AX-9%, when this material is used as electrode in supercapacitors, the resistance of the cell is reduced; therefore, better power densities are obtained. However, its capacitance values are the same as those of AX-3%. The performances of these materials as electrodes in supercapacitors were evaluated taking into account the influence of their porosity and electrical conductivity. Moreover, AX and AX-9% were subjected to mild oxidation with air to study the effect of air on the porosity, electrical conductivity, and performance of these treated samples as electrodes in supercapacitors.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/164317
url http://hdl.handle.net/10261/164317
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2014-54772-P
https://doi.org/10.1016/j.electacta.2018.04.143
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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