Graphene-cellulose tissue composites for high power supercapacitors

Flexible supercapacitors have aroused a great deal of interest for their integration in portable, flexible and wearable electronic devices. In this context, graphene has emerged as an excellent building block for the fabrication of flexible electrodes. However, free-standing graphene films suffer fr...

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Autores: Sevilla Solís, Marta, Álvarez Ferrero, Guillermo, Fuertes Arias, Antonio Benito
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2016
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/134437
Acesso em linha:http://hdl.handle.net/10261/134437
Access Level:acceso abierto
Palavra-chave:Grapene
Cellulose
Flexible
Free-standing
Supercapacitors
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spelling Graphene-cellulose tissue composites for high power supercapacitorsSevilla Solís, MartaÁlvarez Ferrero, GuillermoFuertes Arias, Antonio BenitoGrapeneCelluloseFlexibleFree-standingSupercapacitorsFlexible supercapacitors have aroused a great deal of interest for their integration in portable, flexible and wearable electronic devices. In this context, graphene has emerged as an excellent building block for the fabrication of flexible electrodes. However, free-standing graphene films suffer from a certain lack of mechanical resistance, which limits their use. In this paper, we report on the fabrication of free-standing and flexible composites with enhanced robustness, consisting of a graphene layer deposited over a porous cellulose tissue. The coated graphene consists of two types of holey graphene units (i.e. wrinkled graphene sheets and graphene nanoscrolls) that produce closely interconnected and porous 3D graphene architectures. The graphene-tissue composites developed here have a thickness of around 60 µm and areal densities in the 0.6–2.4 mg cm−2 range. These composites have a very open structure that provides easy access to the electrolyte, thereby guaranteeing high ion-transport rates. In consequence, they show a remarkable capacitive performance in both liquid (1 M H2SO4) and solid (PVA-H2SO4) electrolytes. The supercapacitors assembled with these materials possess an areal capacitance of up to ~80 mF cm−2 at low rates in both kinds of electrolyte and around 60 mF cm−2 at 500 mA cm−2 in H2SO4 and 54 mF cm−2 at ca. 80 mA cm−2 in a gel electrolyte. What is more, these SCs are able to deliver ca. 9 µWh cm−2 of energy at a high power density of 100 mW cm−2.This research work was supported by the FICYT Regional Project (GRUPIN14- 102) and Spanish MINECO (CTQ2015-63552-R).Peer reviewedElsevierMinisterio de Economía y Competitividad (España)Principado de AsturiasConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201620162016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/134437reponame: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/CTQ2015-63552-Rhttp://dx.doi.org/10.1016/j.ensm.2016.05.008Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1344372026-05-22T06:33:51Z
dc.title.none.fl_str_mv Graphene-cellulose tissue composites for high power supercapacitors
title Graphene-cellulose tissue composites for high power supercapacitors
spellingShingle Graphene-cellulose tissue composites for high power supercapacitors
Sevilla Solís, Marta
Grapene
Cellulose
Flexible
Free-standing
Supercapacitors
title_short Graphene-cellulose tissue composites for high power supercapacitors
title_full Graphene-cellulose tissue composites for high power supercapacitors
title_fullStr Graphene-cellulose tissue composites for high power supercapacitors
title_full_unstemmed Graphene-cellulose tissue composites for high power supercapacitors
title_sort Graphene-cellulose tissue composites for high power supercapacitors
dc.creator.none.fl_str_mv Sevilla Solís, Marta
Álvarez Ferrero, Guillermo
Fuertes Arias, Antonio Benito
author Sevilla Solís, Marta
author_facet Sevilla Solís, Marta
Álvarez Ferrero, Guillermo
Fuertes Arias, Antonio Benito
author_role author
author2 Álvarez Ferrero, Guillermo
Fuertes Arias, Antonio Benito
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Principado de Asturias
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Grapene
Cellulose
Flexible
Free-standing
Supercapacitors
topic Grapene
Cellulose
Flexible
Free-standing
Supercapacitors
description Flexible supercapacitors have aroused a great deal of interest for their integration in portable, flexible and wearable electronic devices. In this context, graphene has emerged as an excellent building block for the fabrication of flexible electrodes. However, free-standing graphene films suffer from a certain lack of mechanical resistance, which limits their use. In this paper, we report on the fabrication of free-standing and flexible composites with enhanced robustness, consisting of a graphene layer deposited over a porous cellulose tissue. The coated graphene consists of two types of holey graphene units (i.e. wrinkled graphene sheets and graphene nanoscrolls) that produce closely interconnected and porous 3D graphene architectures. The graphene-tissue composites developed here have a thickness of around 60 µm and areal densities in the 0.6–2.4 mg cm−2 range. These composites have a very open structure that provides easy access to the electrolyte, thereby guaranteeing high ion-transport rates. In consequence, they show a remarkable capacitive performance in both liquid (1 M H2SO4) and solid (PVA-H2SO4) electrolytes. The supercapacitors assembled with these materials possess an areal capacitance of up to ~80 mF cm−2 at low rates in both kinds of electrolyte and around 60 mF cm−2 at 500 mA cm−2 in H2SO4 and 54 mF cm−2 at ca. 80 mA cm−2 in a gel electrolyte. What is more, these SCs are able to deliver ca. 9 µWh cm−2 of energy at a high power density of 100 mW cm−2.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016
2016
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/10261/134437
url http://hdl.handle.net/10261/134437
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/CTQ2015-63552-R
http://dx.doi.org/10.1016/j.ensm.2016.05.008
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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