Surface-related capacitance of microporous carbons in aqueous and organic electrolytes

This paper examines the surface-related capacitance C/S of carbons with average micropore widths between 0.73 and 1.80 nm, using 1–2 M H2SO4, 6 M KOH and 1 M (C2H5)4NBF4 in acetonitrile as electrolytes. Following corrections for pseudocapacitance effects for the aqueous electrolytes and the use of a...

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Authors: Álvarez Centeno, Teresa, Stoeckli, Fritz
Format: article
Status:Versión aceptada para publicación
Publication Date:2011
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/100230
Online Access:http://hdl.handle.net/10261/100230
Access Level:Open access
Keyword:Electrochemical capacitor
Carbon
Microporosity
Surface functionalities
Dielectric constant
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spelling Surface-related capacitance of microporous carbons in aqueous and organic electrolytesÁlvarez Centeno, TeresaStoeckli, FritzElectrochemical capacitorCarbonMicroporositySurface functionalitiesDielectric constantThis paper examines the surface-related capacitance C/S of carbons with average micropore widths between 0.73 and 1.80 nm, using 1–2 M H2SO4, 6 M KOH and 1 M (C2H5)4NBF4 in acetonitrile as electrolytes. Following corrections for pseudocapacitance effects for the aqueous electrolytes and the use of an average surface area suggested by independent techniques, different from the BET area, it appears that C/S is practically independent of the micropore width. The analysis of the data with the help of recent models suggests that the dielectric constants ɛr of the different electrolytes may decrease with the pore size. It is surprising that the coexistence of two sets of values for the surface area of microporous carbons and its consequence on C/S have not received more attention in the past.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201420142011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/100230reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.electacta.2011.06.040Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1002302026-05-22T06:33:51Z
dc.title.none.fl_str_mv Surface-related capacitance of microporous carbons in aqueous and organic electrolytes
title Surface-related capacitance of microporous carbons in aqueous and organic electrolytes
spellingShingle Surface-related capacitance of microporous carbons in aqueous and organic electrolytes
Álvarez Centeno, Teresa
Electrochemical capacitor
Carbon
Microporosity
Surface functionalities
Dielectric constant
title_short Surface-related capacitance of microporous carbons in aqueous and organic electrolytes
title_full Surface-related capacitance of microporous carbons in aqueous and organic electrolytes
title_fullStr Surface-related capacitance of microporous carbons in aqueous and organic electrolytes
title_full_unstemmed Surface-related capacitance of microporous carbons in aqueous and organic electrolytes
title_sort Surface-related capacitance of microporous carbons in aqueous and organic electrolytes
dc.creator.none.fl_str_mv Álvarez Centeno, Teresa
Stoeckli, Fritz
author Álvarez Centeno, Teresa
author_facet Álvarez Centeno, Teresa
Stoeckli, Fritz
author_role author
author2 Stoeckli, Fritz
author2_role author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Electrochemical capacitor
Carbon
Microporosity
Surface functionalities
Dielectric constant
topic Electrochemical capacitor
Carbon
Microporosity
Surface functionalities
Dielectric constant
description This paper examines the surface-related capacitance C/S of carbons with average micropore widths between 0.73 and 1.80 nm, using 1–2 M H2SO4, 6 M KOH and 1 M (C2H5)4NBF4 in acetonitrile as electrolytes. Following corrections for pseudocapacitance effects for the aqueous electrolytes and the use of an average surface area suggested by independent techniques, different from the BET area, it appears that C/S is practically independent of the micropore width. The analysis of the data with the help of recent models suggests that the dielectric constants ɛr of the different electrolytes may decrease with the pore size. It is surprising that the coexistence of two sets of values for the surface area of microporous carbons and its consequence on C/S have not received more attention in the past.
publishDate 2011
dc.date.none.fl_str_mv 2011
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/10261/100230
url http://hdl.handle.net/10261/100230
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.2011.06.040
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
_version_ 1869413418568515584
score 15.811543

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