Electrochemical response of carbon aerogel electrodes in saline water

Four carbon aerogels with varied micro/mesoporous texture were synthesized and their electrochemical response for the electro-adsorption of ions investigated in saline electrolyte. As a general trend, the ability of the electrodes to electrosorb ions depended on the microporosity, whereas the large...

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Detalles Bibliográficos
Autores: Rasines, Gloria, Lavela, P., Macías, Carlos, Haro, Marta, Ovín Ania, María Concepción, Tirado, J.L.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/99566
Acceso en línea:http://hdl.handle.net/10261/99566
Access Level:acceso abierto
Palabra clave:Carbon
Aerogeles
Electrosorption
Impedance
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spelling Electrochemical response of carbon aerogel electrodes in saline waterRasines, GloriaLavela, P.Macías, CarlosHaro, Marta Ovín Ania, María ConcepciónTirado, J.L.CarbonAerogelesElectrosorptionImpedanceFour carbon aerogels with varied micro/mesoporous texture were synthesized and their electrochemical response for the electro-adsorption of ions investigated in saline electrolyte. As a general trend, the ability of the electrodes to electrosorb ions depended on the microporosity, whereas the large pores (mesopores) had a strong influence on the kinetics of the electrosorption process. The aerogels exhibiting a well developed microporosity interconnected by a large mesoporous network showed large capacitance values and fast electro-adsorption kinetics. Indeed, the diffusion of the ionic species in solution controls the performance of the electrodes at high current loadings (or scan rates). We show that this pore size distribution is easily controlled by modifying the precursor/catalyst ratio in the carbon aerogel fabrication. Optimized electrode materials should combine pores within the micropore range to effectively electrosorb ions and large mesopore volumes for a fast diffusion of the ionic species in solution. An adequate meso/micropore ratio in the carbon aerogels here reported allowed to record a capacitance value of 76 F g−1.The authors are indebted to the Spanish MARM (grant 083/RN08/03.3) and MICINN (grants CTM2008-01956 and CTM2011-23378) for financial support. Technical support of M.C. Mohedano is also acknowledged. MH thanks CSIC for a postdoctoral contract.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201420142012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/99566reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.jelechem.2012.02.025Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/995662026-05-22T06:33:51Z
dc.title.none.fl_str_mv Electrochemical response of carbon aerogel electrodes in saline water
title Electrochemical response of carbon aerogel electrodes in saline water
spellingShingle Electrochemical response of carbon aerogel electrodes in saline water
Rasines, Gloria
Carbon
Aerogeles
Electrosorption
Impedance
title_short Electrochemical response of carbon aerogel electrodes in saline water
title_full Electrochemical response of carbon aerogel electrodes in saline water
title_fullStr Electrochemical response of carbon aerogel electrodes in saline water
title_full_unstemmed Electrochemical response of carbon aerogel electrodes in saline water
title_sort Electrochemical response of carbon aerogel electrodes in saline water
dc.creator.none.fl_str_mv Rasines, Gloria
Lavela, P.
Macías, Carlos
Haro, Marta
Ovín Ania, María Concepción
Tirado, J.L.
author Rasines, Gloria
author_facet Rasines, Gloria
Lavela, P.
Macías, Carlos
Haro, Marta
Ovín Ania, María Concepción
Tirado, J.L.
author_role author
author2 Lavela, P.
Macías, Carlos
Haro, Marta
Ovín Ania, María Concepción
Tirado, J.L.
author2_role author
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 Carbon
Aerogeles
Electrosorption
Impedance
topic Carbon
Aerogeles
Electrosorption
Impedance
description Four carbon aerogels with varied micro/mesoporous texture were synthesized and their electrochemical response for the electro-adsorption of ions investigated in saline electrolyte. As a general trend, the ability of the electrodes to electrosorb ions depended on the microporosity, whereas the large pores (mesopores) had a strong influence on the kinetics of the electrosorption process. The aerogels exhibiting a well developed microporosity interconnected by a large mesoporous network showed large capacitance values and fast electro-adsorption kinetics. Indeed, the diffusion of the ionic species in solution controls the performance of the electrodes at high current loadings (or scan rates). We show that this pore size distribution is easily controlled by modifying the precursor/catalyst ratio in the carbon aerogel fabrication. Optimized electrode materials should combine pores within the micropore range to effectively electrosorb ions and large mesopore volumes for a fast diffusion of the ionic species in solution. An adequate meso/micropore ratio in the carbon aerogels here reported allowed to record a capacitance value of 76 F g−1.
publishDate 2012
dc.date.none.fl_str_mv 2012
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/10261/99566
url http://hdl.handle.net/10261/99566
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.jelechem.2012.02.025
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 15.812429

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