Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performance

The increasing complexity of portable electronics demands the development of energy storage devices with higher volumetric energy and power densities. In this work we report a simple strategy for the preparation of partially reduced graphene oxide/carbon nanotube composites (prGO-CNT) as highly pack...

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Detalles Bibliográficos
Autores: Díez Nogués, Noel, Botas, Cristina, Mysyk, Roman, Goikolea, Eider, Rojo, Teófilo, Carriazo, Daniel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/345242
Acceso en línea:http://hdl.handle.net/10261/345242
https://api.elsevier.com/content/abstract/scopus_id/85042415691
Access Level:acceso abierto
Palabra clave:http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
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spelling Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performanceDíez Nogués, NoelBotas, CristinaMysyk, RomanGoikolea, EiderRojo, TeófiloCarriazo, Danielhttp://metadata.un.org/sdg/9http://metadata.un.org/sdg/7Ensure access to affordable, reliable, sustainable and modern energy for allBuild resilient infrastructure, promote inclusive and sustainable industrialization and foster innovationThe increasing complexity of portable electronics demands the development of energy storage devices with higher volumetric energy and power densities. In this work we report a simple strategy for the preparation of partially reduced graphene oxide/carbon nanotube composites (prGO-CNT) as highly packed self-standing binder-free films suitable as electrodes for supercapacitors. These carbon-based films are easily obtained by the hydrothermal treatment of an aqueous suspension of graphene oxide and CNTs at 210 °C and then compacted under pressure. The prGO-CNT films, which had an apparent density as high as 1.5 g cm-3, were investigated as binder-free electrodes for aqueous supercapacitors using 6 M KOH solution as the electrolyte. The results show that the presence of merely 2 wt% of CNTs produces a significant enhancement of the capacitance retention at high current densities compared to the CNT-free samples, and this improvement is especially relevant in systems formed using electrodes with high mass loadings. Volumetric capacitance values of 250 F cm-3 at 1 A g-1 with outstanding capacitance retention (200 F cm-3 at 10 A g-1) were achieved using the prGO-CNT electrodes with an areal mass loading above 12 mg cm-2.This work was financially supported by the European Union (Graphene Flagship, Core 1) and the Spanish Ministry of Economy and Competitiveness (MINECO/FEDER) (MAT2015-64617-C2-2-R). The authors also thank GRAPHENEA Company for supplying the graphene oxide used in this study. We also thank Dr Oleksandr Bondarchuk for his fruitful help on the XPS data acquisition.Peer reviewedRoyal Society of Chemistry (UK)Ministerio de Economía y Competitividad (España)Díez Nogués, Noel [0000-0002-6072-8947]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/345242https://api.elsevier.com/content/abstract/scopus_id/85042415691reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO//MAT2015-64617-C2-2-RJournal of Materials Chemistry Ahttps://doi.org/10.1039/C7TA10210KSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3452422026-05-22T06:33:51Z
dc.title.none.fl_str_mv Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performance
title Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performance
spellingShingle Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performance
Díez Nogués, Noel
http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
title_short Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performance
title_full Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performance
title_fullStr Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performance
title_full_unstemmed Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performance
title_sort Highly packed graphene-CNT films as electrodes for aqueous supercapacitors with high volumetric performance
dc.creator.none.fl_str_mv Díez Nogués, Noel
Botas, Cristina
Mysyk, Roman
Goikolea, Eider
Rojo, Teófilo
Carriazo, Daniel
author Díez Nogués, Noel
author_facet Díez Nogués, Noel
Botas, Cristina
Mysyk, Roman
Goikolea, Eider
Rojo, Teófilo
Carriazo, Daniel
author_role author
author2 Botas, Cristina
Mysyk, Roman
Goikolea, Eider
Rojo, Teófilo
Carriazo, Daniel
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Díez Nogués, Noel [0000-0002-6072-8947]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
topic http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
description The increasing complexity of portable electronics demands the development of energy storage devices with higher volumetric energy and power densities. In this work we report a simple strategy for the preparation of partially reduced graphene oxide/carbon nanotube composites (prGO-CNT) as highly packed self-standing binder-free films suitable as electrodes for supercapacitors. These carbon-based films are easily obtained by the hydrothermal treatment of an aqueous suspension of graphene oxide and CNTs at 210 °C and then compacted under pressure. The prGO-CNT films, which had an apparent density as high as 1.5 g cm-3, were investigated as binder-free electrodes for aqueous supercapacitors using 6 M KOH solution as the electrolyte. The results show that the presence of merely 2 wt% of CNTs produces a significant enhancement of the capacitance retention at high current densities compared to the CNT-free samples, and this improvement is especially relevant in systems formed using electrodes with high mass loadings. Volumetric capacitance values of 250 F cm-3 at 1 A g-1 with outstanding capacitance retention (200 F cm-3 at 10 A g-1) were achieved using the prGO-CNT electrodes with an areal mass loading above 12 mg cm-2.
publishDate 2018
dc.date.none.fl_str_mv 2018
2024
2024
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/10261/345242
https://api.elsevier.com/content/abstract/scopus_id/85042415691
url http://hdl.handle.net/10261/345242
https://api.elsevier.com/content/abstract/scopus_id/85042415691
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//MAT2015-64617-C2-2-R
Journal of Materials Chemistry A
https://doi.org/10.1039/C7TA10210K
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Royal Society of Chemistry (UK)
publisher.none.fl_str_mv Royal Society of Chemistry (UK)
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 15,81155

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