Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applications

Three-dimensional (3D) carbon nanostructures are promising architectures to improve both specific capacity and power density of electrochemical energy storage systems. Their open structure and porosity provide a large space for active sites and high ion diffusion rates. To further increase their spe...

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Autores: Hussain, Shahzad, Amade Rovira, Roger, Boyd, Adrian, Musheghyan Avetisyan, Arevik, Alshaikh, Islam, Martí González, Joan, Pascual Miralles, Esther, Meenan, Brian J., Bertrán Serra, Enric
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/182108
Acceso en línea:https://hdl.handle.net/2445/182108
Access Level:acceso abierto
Palabra clave:Condensadors elèctrics
Grafè
Nanoestructures
Capacitors
Graphene
Nanostructures
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spelling Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applicationsHussain, ShahzadAmade Rovira, RogerBoyd, AdrianMusheghyan Avetisyan, ArevikAlshaikh, IslamMartí González, JoanPascual Miralles, EstherMeenan, Brian J.Bertrán Serra, EnricCondensadors elèctricsGrafèNanoestructuresCapacitorsGrapheneNanostructuresThree-dimensional (3D) carbon nanostructures are promising architectures to improve both specific capacity and power density of electrochemical energy storage systems. Their open structure and porosity provide a large space for active sites and high ion diffusion rates. To further increase their specific capacity, they can be combined with metal oxides. However, this combination often results in the loss of cycling stability and power density. Among the different electrode materials being studied, vertically oriented graphene nanowalls (VG) have recently been put forward as a potential candidate. Here, we report the use of VG covered by Si for increased supercapacitor performance. VG were grown on flexible graphite sheet (FGS) substrate by inductively coupled plasma chemical vapor deposition (ICP-CVD). Furthermore, silicon (Si) was deposited by magnetron sputtering on VG and the electrochemical performance studied in ionic liquid (IL) electrolyte. The incorporation of Si in VG/FGS provides an areal capacitance up to 16.4 mF cm−2, which is a factor 2 and 1.4 greater than that of bare substrate and VG/FGS, respectively. This increase in capacitance does not penalize the cycling stability of Si/VG/GS, which remains outstanding up to 10,000 cycles in IL. In addition, the relaxation time constant decreases from 9.1 to 0.56 ms after Si deposition on VG/FGS.Elsevier B.V.2022202220212022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion8 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/182108Articles publicats en revistes (Física Aplicada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1016/j.ceramint.2021.04.190Ceramics International, 2021, vol. 47, p. 21751-21758https://doi.org/10.1016/j.ceramint.2021.04.190cc-by-nc-nd (c) Hussain, 2021https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1821082026-05-29T05:05:01Z
dc.title.none.fl_str_mv Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applications
title Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applications
spellingShingle Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applications
Hussain, Shahzad
Condensadors elèctrics
Grafè
Nanoestructures
Capacitors
Graphene
Nanostructures
title_short Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applications
title_full Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applications
title_fullStr Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applications
title_full_unstemmed Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applications
title_sort Three-dimensional Si / vertically oriented graphene nanowalls composite for supercapacitor applications
dc.creator.none.fl_str_mv Hussain, Shahzad
Amade Rovira, Roger
Boyd, Adrian
Musheghyan Avetisyan, Arevik
Alshaikh, Islam
Martí González, Joan
Pascual Miralles, Esther
Meenan, Brian J.
Bertrán Serra, Enric
author Hussain, Shahzad
author_facet Hussain, Shahzad
Amade Rovira, Roger
Boyd, Adrian
Musheghyan Avetisyan, Arevik
Alshaikh, Islam
Martí González, Joan
Pascual Miralles, Esther
Meenan, Brian J.
Bertrán Serra, Enric
author_role author
author2 Amade Rovira, Roger
Boyd, Adrian
Musheghyan Avetisyan, Arevik
Alshaikh, Islam
Martí González, Joan
Pascual Miralles, Esther
Meenan, Brian J.
Bertrán Serra, Enric
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Condensadors elèctrics
Grafè
Nanoestructures
Capacitors
Graphene
Nanostructures
topic Condensadors elèctrics
Grafè
Nanoestructures
Capacitors
Graphene
Nanostructures
description Three-dimensional (3D) carbon nanostructures are promising architectures to improve both specific capacity and power density of electrochemical energy storage systems. Their open structure and porosity provide a large space for active sites and high ion diffusion rates. To further increase their specific capacity, they can be combined with metal oxides. However, this combination often results in the loss of cycling stability and power density. Among the different electrode materials being studied, vertically oriented graphene nanowalls (VG) have recently been put forward as a potential candidate. Here, we report the use of VG covered by Si for increased supercapacitor performance. VG were grown on flexible graphite sheet (FGS) substrate by inductively coupled plasma chemical vapor deposition (ICP-CVD). Furthermore, silicon (Si) was deposited by magnetron sputtering on VG and the electrochemical performance studied in ionic liquid (IL) electrolyte. The incorporation of Si in VG/FGS provides an areal capacitance up to 16.4 mF cm−2, which is a factor 2 and 1.4 greater than that of bare substrate and VG/FGS, respectively. This increase in capacitance does not penalize the cycling stability of Si/VG/GS, which remains outstanding up to 10,000 cycles in IL. In addition, the relaxation time constant decreases from 9.1 to 0.56 ms after Si deposition on VG/FGS.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/182108
url https://hdl.handle.net/2445/182108
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.ceramint.2021.04.190
Ceramics International, 2021, vol. 47, p. 21751-21758
https://doi.org/10.1016/j.ceramint.2021.04.190
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Hussain, 2021
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Hussain, 2021
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Física Aplicada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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