Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantification

In order to understand the participation of electrical double layer and pseudocapacitance to the overall behavior of supercapacitors, a new approach to the analysis of the electrochemical data is proposed. Both the variation of the specific capacitance values and the dependence of these values with...

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Detalles Bibliográficos
Autores: Ruiz Ruiz, Vanesa, Roldán Luna, Silvia, Villar Masetto, Isabel, Blanco Rodríguez, Clara, Santamaría Ramírez, Ricardo
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/99682
Acceso en línea:http://hdl.handle.net/10261/99682
Access Level:acceso abierto
Palabra clave:Activated carbon
Supercapacitors
Double layer
Pseudocapacitance
Voltage dependence
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spelling Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantificationRuiz Ruiz, VanesaRoldán Luna, SilviaVillar Masetto, IsabelBlanco Rodríguez, ClaraSantamaría Ramírez, RicardoActivated carbonSupercapacitorsDouble layerPseudocapacitanceVoltage dependenceIn order to understand the participation of electrical double layer and pseudocapacitance to the overall behavior of supercapacitors, a new approach to the analysis of the electrochemical data is proposed. Both the variation of the specific capacitance values and the dependence of these values with the operating voltage window (varying from 0–0.2 V to 0–1 V) were evaluated and used to quantify the contribution arising from each mechanism of energy storage to the total capacitance of the system. The suitability of the methodology here proposed was tested in various carbon materials (multiwalled carbon nanotubes, a carbon aerogel and two activated carbons), different both in nature and physicochemical characteristics. For all of the carbons studied, the capacitance with an exclusive faradic and non-faradic origin was quantified. Whereas some of the carbons studied showed a behavior close to an ideal electrical double layer capacitor (EDLC) with virtually no pseudocapacitance contribution (case of the carbon nanotubes), others presented up to a 40% of pseudocapacitance contribution (case of KOH-activated carbon).Authors acknowledge financial support from the MICINN and European Union (Project MAT2010-20601-C02-01). Silvia Roldán thanks MICINN for a FPI predoctoral research grant.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201420142013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/99682reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.electacta.2013.02.056Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/996822026-05-22T06:33:51Z
dc.title.none.fl_str_mv Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantification
title Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantification
spellingShingle Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantification
Ruiz Ruiz, Vanesa
Activated carbon
Supercapacitors
Double layer
Pseudocapacitance
Voltage dependence
title_short Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantification
title_full Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantification
title_fullStr Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantification
title_full_unstemmed Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantification
title_sort Voltage dependence of carbon-based supercapacitors for pseudocapacitance quantification
dc.creator.none.fl_str_mv Ruiz Ruiz, Vanesa
Roldán Luna, Silvia
Villar Masetto, Isabel
Blanco Rodríguez, Clara
Santamaría Ramírez, Ricardo
author Ruiz Ruiz, Vanesa
author_facet Ruiz Ruiz, Vanesa
Roldán Luna, Silvia
Villar Masetto, Isabel
Blanco Rodríguez, Clara
Santamaría Ramírez, Ricardo
author_role author
author2 Roldán Luna, Silvia
Villar Masetto, Isabel
Blanco Rodríguez, Clara
Santamaría Ramírez, Ricardo
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Activated carbon
Supercapacitors
Double layer
Pseudocapacitance
Voltage dependence
topic Activated carbon
Supercapacitors
Double layer
Pseudocapacitance
Voltage dependence
description In order to understand the participation of electrical double layer and pseudocapacitance to the overall behavior of supercapacitors, a new approach to the analysis of the electrochemical data is proposed. Both the variation of the specific capacitance values and the dependence of these values with the operating voltage window (varying from 0–0.2 V to 0–1 V) were evaluated and used to quantify the contribution arising from each mechanism of energy storage to the total capacitance of the system. The suitability of the methodology here proposed was tested in various carbon materials (multiwalled carbon nanotubes, a carbon aerogel and two activated carbons), different both in nature and physicochemical characteristics. For all of the carbons studied, the capacitance with an exclusive faradic and non-faradic origin was quantified. Whereas some of the carbons studied showed a behavior close to an ideal electrical double layer capacitor (EDLC) with virtually no pseudocapacitance contribution (case of the carbon nanotubes), others presented up to a 40% of pseudocapacitance contribution (case of KOH-activated carbon).
publishDate 2013
dc.date.none.fl_str_mv 2013
2014
2014
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/10261/99682
url http://hdl.handle.net/10261/99682
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.electacta.2013.02.056
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 15,811543

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