Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes

In search for new electrodes for electrochemical capacitors, two template mesoporous carbons (TMC) are prepared with the replica method by using Plugged Hexagonal Templated Silica (PHTS) and Mesostructured Cellular Foam (MCF) as hard templates. No subsequent activation after synthesis is carried out...

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Detalhes bibliográficos
Autores: Ortiz-Bustos, Josefa, Real, Silvia Graciela, Cruz, Manuel, Santos-Peña, Jesús
Tipo de documento: artigo
Data de publicação:2017
País:España
Recursos:Universidad Rey Juan Carlos
Repositório:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
OAI Identifier:oai:burjcdigital.urjc.es:10115/42024
Acesso em linha:https://hdl.handle.net/10115/42024
Access Level:Acceso aberto
Palavra-chave:mesoporous carbon
supercapacitors
silica templated
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spelling Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytesOrtiz-Bustos, JosefaReal, Silvia GracielaCruz, ManuelSantos-Peña, Jesúsmesoporous carbonsupercapacitorssilica templatedIn search for new electrodes for electrochemical capacitors, two template mesoporous carbons (TMC) are prepared with the replica method by using Plugged Hexagonal Templated Silica (PHTS) and Mesostructured Cellular Foam (MCF) as hard templates. No subsequent activation after synthesis is carried out in order to correlate textural and electrochemical properties in neutral sulfate electrolytes. TMC show interesting textural and conductive properties for capacitor electrode purposes: specific surface areas higher than 1000 m2 g−1, and low D/G bands ratio in the Raman spectra. Mesopore presence accounts for the fast formation of the double layer and the decrease of resistive properties which implies increased power properties referred to activated carbons. Symmetric carbon/carbon devices can provide energy densities 7–9 Wh kg−1 and maximal powers higher than 50 kW kg−1. These values compare well with 9 Wh kg−1 and 26 Wh kg−1 furnished by activated carbons. Nevertheless, such TMCs show two major issues for performing better than activated carbons in aqueous electrolyte capacitors. Firstly, they show surface carbon functionalities, narrowing the electrochemical window of the capacitor and decreasing the capacitor cycling life. Secondly, pore saturation is evidenced in these systems, unlike activated carbon, showing higher specific surface area and micropores content. Under prolonged cycling, our TMC electrode performance is poorer than that of activated carbon. However, mesoporosity positively affects the electrode response against increasing power. Beyond a power of 1.4 kW kg−1, only TMCs provide stable energy densities (>6.5 Wh kg−1), comparable or higher than those observed for activated carbons in corrosive electrolytes.Elsevier202420242017info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10115/42024reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlosinstname:Universidad Rey Juan CarlosInglésAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:burjcdigital.urjc.es:10115/420242026-06-24T12:48:17Z
dc.title.none.fl_str_mv Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
title Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
spellingShingle Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
Ortiz-Bustos, Josefa
mesoporous carbon
supercapacitors
silica templated
title_short Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
title_full Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
title_fullStr Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
title_full_unstemmed Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
title_sort Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
dc.creator.none.fl_str_mv Ortiz-Bustos, Josefa
Real, Silvia Graciela
Cruz, Manuel
Santos-Peña, Jesús
author Ortiz-Bustos, Josefa
author_facet Ortiz-Bustos, Josefa
Real, Silvia Graciela
Cruz, Manuel
Santos-Peña, Jesús
author_role author
author2 Real, Silvia Graciela
Cruz, Manuel
Santos-Peña, Jesús
author2_role author
author
author
dc.subject.none.fl_str_mv mesoporous carbon
supercapacitors
silica templated
topic mesoporous carbon
supercapacitors
silica templated
description In search for new electrodes for electrochemical capacitors, two template mesoporous carbons (TMC) are prepared with the replica method by using Plugged Hexagonal Templated Silica (PHTS) and Mesostructured Cellular Foam (MCF) as hard templates. No subsequent activation after synthesis is carried out in order to correlate textural and electrochemical properties in neutral sulfate electrolytes. TMC show interesting textural and conductive properties for capacitor electrode purposes: specific surface areas higher than 1000 m2 g−1, and low D/G bands ratio in the Raman spectra. Mesopore presence accounts for the fast formation of the double layer and the decrease of resistive properties which implies increased power properties referred to activated carbons. Symmetric carbon/carbon devices can provide energy densities 7–9 Wh kg−1 and maximal powers higher than 50 kW kg−1. These values compare well with 9 Wh kg−1 and 26 Wh kg−1 furnished by activated carbons. Nevertheless, such TMCs show two major issues for performing better than activated carbons in aqueous electrolyte capacitors. Firstly, they show surface carbon functionalities, narrowing the electrochemical window of the capacitor and decreasing the capacitor cycling life. Secondly, pore saturation is evidenced in these systems, unlike activated carbon, showing higher specific surface area and micropores content. Under prolonged cycling, our TMC electrode performance is poorer than that of activated carbon. However, mesoporosity positively affects the electrode response against increasing power. Beyond a power of 1.4 kW kg−1, only TMCs provide stable energy densities (>6.5 Wh kg−1), comparable or higher than those observed for activated carbons in corrosive electrolytes.
publishDate 2017
dc.date.none.fl_str_mv 2017
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10115/42024
url https://hdl.handle.net/10115/42024
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
instname:Universidad Rey Juan Carlos
instname_str Universidad Rey Juan Carlos
reponame_str BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
collection BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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