Long-term cycling of carbon-based supercapacitors in aqueous media

[EN] The behaviour of mesophase-derived electrodes on long-duration cycling conditions was studied in 1 M sulfuric acid and 6 M potassium hydroxide. Variation in the specific capacitance values with the number of cycles shows a good cycling life performance in acidic media but very poor in an alkali...

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Detalles Bibliográficos
Autores: Ruiz Ruiz, Vanesa, Santamaría Ramírez, Ricardo, Granda Ferreira, Marcos, Blanco Rodríguez, Clara
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/88775
Acceso en línea:http://hdl.handle.net/10261/88775
Access Level:acceso abierto
Palabra clave:Activated carbon
Electrochemical capacitor
Double layer
Pseudocapacitance
Long-term cycling
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spelling Long-term cycling of carbon-based supercapacitors in aqueous mediaRuiz Ruiz, VanesaSantamaría Ramírez, RicardoGranda Ferreira, MarcosBlanco Rodríguez, ClaraActivated carbonElectrochemical capacitorDouble layerPseudocapacitanceLong-term cycling[EN] The behaviour of mesophase-derived electrodes on long-duration cycling conditions was studied in 1 M sulfuric acid and 6 M potassium hydroxide. Variation in the specific capacitance values with the number of cycles shows a good cycling life performance in acidic media but very poor in an alkaline electrolyte. The total loss of capacitance after 7000 cycles in acidic media is 8% at 0.6 V and 16% at 1 V, whereas in the basic electrolyte the reduction in the capacitance values is 72%, even at a very small operating voltage (0.6 V). This behaviour was associated to the strong oxidation of the positive electrode caused by the progressive shift of the working potential towards very positive potential values during cycling.This work has been performed with financial support from MEC (project MAT2007-61467) and FICYT (project IB05-086-C1). V. Ruiz acknowledges a predoctoral research grant from FICYT.Peer reviewedElsevier2009info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/88775reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.electacta.2009.03.024info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/887752026-05-22T06:33:51Z
dc.title.none.fl_str_mv Long-term cycling of carbon-based supercapacitors in aqueous media
title Long-term cycling of carbon-based supercapacitors in aqueous media
spellingShingle Long-term cycling of carbon-based supercapacitors in aqueous media
Ruiz Ruiz, Vanesa
Activated carbon
Electrochemical capacitor
Double layer
Pseudocapacitance
Long-term cycling
title_short Long-term cycling of carbon-based supercapacitors in aqueous media
title_full Long-term cycling of carbon-based supercapacitors in aqueous media
title_fullStr Long-term cycling of carbon-based supercapacitors in aqueous media
title_full_unstemmed Long-term cycling of carbon-based supercapacitors in aqueous media
title_sort Long-term cycling of carbon-based supercapacitors in aqueous media
dc.creator.none.fl_str_mv Ruiz Ruiz, Vanesa
Santamaría Ramírez, Ricardo
Granda Ferreira, Marcos
Blanco Rodríguez, Clara
author Ruiz Ruiz, Vanesa
author_facet Ruiz Ruiz, Vanesa
Santamaría Ramírez, Ricardo
Granda Ferreira, Marcos
Blanco Rodríguez, Clara
author_role author
author2 Santamaría Ramírez, Ricardo
Granda Ferreira, Marcos
Blanco Rodríguez, Clara
author2_role author
author
author
dc.subject.none.fl_str_mv Activated carbon
Electrochemical capacitor
Double layer
Pseudocapacitance
Long-term cycling
topic Activated carbon
Electrochemical capacitor
Double layer
Pseudocapacitance
Long-term cycling
description [EN] The behaviour of mesophase-derived electrodes on long-duration cycling conditions was studied in 1 M sulfuric acid and 6 M potassium hydroxide. Variation in the specific capacitance values with the number of cycles shows a good cycling life performance in acidic media but very poor in an alkaline electrolyte. The total loss of capacitance after 7000 cycles in acidic media is 8% at 0.6 V and 16% at 1 V, whereas in the basic electrolyte the reduction in the capacitance values is 72%, even at a very small operating voltage (0.6 V). This behaviour was associated to the strong oxidation of the positive electrode caused by the progressive shift of the working potential towards very positive potential values during cycling.
publishDate 2009
dc.date.none.fl_str_mv 2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/88775
url http://hdl.handle.net/10261/88775
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.2009.03.024
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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