Correlation between heats of immersion and limiting capacitances in porous carbons

6 pages, 3 figures, 2 tables.-- Printed version published Jun 2008.

Detalles Bibliográficos
Autores: Álvarez Centeno, Teresa, Fernández López, José Antonio, Stoeckli, F.
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/11266
Acceso en línea:http://hdl.handle.net/10261/11266
Access Level:acceso abierto
Palabra clave:Double-layer capacitance
Pore-size distributions
Activated carbon
Electrochemical capacitors
Surface-area
Mesoporous carbons
Aqueous-solutions
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spelling Correlation between heats of immersion and limiting capacitances in porous carbonsÁlvarez Centeno, TeresaFernández López, José AntonioStoeckli, F.Double-layer capacitancePore-size distributionsActivated carbonElectrochemical capacitorsSurface-areaMesoporous carbonsAqueous-solutions6 pages, 3 figures, 2 tables.-- Printed version published Jun 2008.Based on more than 80 carbons, the paper shows that immersion calorimetry into benzene, water and carbon tetrachloride can be used to assess with a good accuracy the limiting capacitance Co at low current densities in both acidic (2 M H2SO4) and aprotic (1 M tetraethyl ammonium tetrafluoroborate in acetonitrile) electrolytic solutions. The enthalpies of immersion ΔiH(C6H6) and ΔiH(H2O) provide information on Co-acidic, where both the surface area and the oxygen content play a role. On the other hand, in the case of the organic electrolyte the oxygen content has only a small influence and Co-aprotic is directly related to ΔiH(C6H6) and ΔiH(CCl4). Carbon tetrachloride has a critical dimension (0.65 nm), which is close to the size of the (C2H5)4N+ ion (0.68 nm) and therefore ΔiH(CCl4) provides better information in the case of carbons with small micropores. The advantage of this approach lies in the fact that immersion calorimetry, in itself a useful tool for the structural and the chemical characterization of carbons, can also be used to evaluate directly the gravimetric capacitances of these solids at low current densities.Peer reviewedElsevier200920092008info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_650122195 bytesapplication/pdfhttp://hdl.handle.net/10261/11266reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.carbon.2008.03.005info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/112662026-05-22T06:33:51Z
dc.title.none.fl_str_mv Correlation between heats of immersion and limiting capacitances in porous carbons
title Correlation between heats of immersion and limiting capacitances in porous carbons
spellingShingle Correlation between heats of immersion and limiting capacitances in porous carbons
Álvarez Centeno, Teresa
Double-layer capacitance
Pore-size distributions
Activated carbon
Electrochemical capacitors
Surface-area
Mesoporous carbons
Aqueous-solutions
title_short Correlation between heats of immersion and limiting capacitances in porous carbons
title_full Correlation between heats of immersion and limiting capacitances in porous carbons
title_fullStr Correlation between heats of immersion and limiting capacitances in porous carbons
title_full_unstemmed Correlation between heats of immersion and limiting capacitances in porous carbons
title_sort Correlation between heats of immersion and limiting capacitances in porous carbons
dc.creator.none.fl_str_mv Álvarez Centeno, Teresa
Fernández López, José Antonio
Stoeckli, F.
author Álvarez Centeno, Teresa
author_facet Álvarez Centeno, Teresa
Fernández López, José Antonio
Stoeckli, F.
author_role author
author2 Fernández López, José Antonio
Stoeckli, F.
author2_role author
author
dc.subject.none.fl_str_mv Double-layer capacitance
Pore-size distributions
Activated carbon
Electrochemical capacitors
Surface-area
Mesoporous carbons
Aqueous-solutions
topic Double-layer capacitance
Pore-size distributions
Activated carbon
Electrochemical capacitors
Surface-area
Mesoporous carbons
Aqueous-solutions
description 6 pages, 3 figures, 2 tables.-- Printed version published Jun 2008.
publishDate 2008
dc.date.none.fl_str_mv 2008
2009
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/10261/11266
url http://hdl.handle.net/10261/11266
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.carbon.2008.03.005
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 22195 bytes
application/pdf
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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