Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current Collectors

Graphene nano-walls (GNWs) are promising materials that can be used as an electrode in electrochemical devices. We have grown GNWs by inductively-coupled plasma-enhanced chemical vapor deposition on stainless steel (AISI304) substrate. In order to enhance the super-capacitive properties of the elect...

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Autores: Amade Rovira, Roger, Muyshegyan-Avetisyan, Arevik, Martí González, Joan, Pérez del Pino, Ángel, György, Eniko, Pascual Miralles, Esther, Andújar Bella, José Luis, Bertrán Serra, Enric
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/158581
Acceso en línea:https://hdl.handle.net/2445/158581
Access Level:acceso abierto
Palabra clave:Grafè
Aparells electrònics
Acer inoxidable
Graphene
Electronic apparatus and appliances
Stainless steel
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spelling Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current CollectorsAmade Rovira, RogerMuyshegyan-Avetisyan, ArevikMartí González, JoanPérez del Pino, ÁngelGyörgy, EnikoPascual Miralles, EstherAndújar Bella, José LuisBertrán Serra, EnricGrafèAparells electrònicsAcer inoxidableGrapheneElectronic apparatus and appliancesStainless steelGraphene nano-walls (GNWs) are promising materials that can be used as an electrode in electrochemical devices. We have grown GNWs by inductively-coupled plasma-enhanced chemical vapor deposition on stainless steel (AISI304) substrate. In order to enhance the super-capacitive properties of the electrodes, we have deposited a thin layer of MnO2 by electrodeposition method. We studied the effect of annealing temperature on the electrochemical properties of the samples between 70 °C and 600 °C. Best performance for supercapacitor applications was obtained after annealing at 70 °C with a specific capacitance of 104 F·g−1 at 150 mV·s−1 and a cycling stability of more than 14k cycles with excellent coulombic efficiency and 73% capacitance retention. Electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge/discharge measurements reveal fast proton diffusion (1.3 × 10−13 cm2·s−1) and surface redox reaction after annealing at 70 °C.MDPI2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/158581Articles publicats en revistes (Física Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.3390/ma12030483Materials, 2019, vol. 12, num. 3, p. 483https://doi.org/10.3390/ma12030483cc-by (c) Amade Rovira, Roger et al., 2019http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1585812026-05-27T06:46:51Z
dc.title.none.fl_str_mv Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current Collectors
title Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current Collectors
spellingShingle Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current Collectors
Amade Rovira, Roger
Grafè
Aparells electrònics
Acer inoxidable
Graphene
Electronic apparatus and appliances
Stainless steel
title_short Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current Collectors
title_full Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current Collectors
title_fullStr Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current Collectors
title_full_unstemmed Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current Collectors
title_sort Super-Capacitive Performance of Manganese Dioxide/Graphene Nano-Walls Electrodes Deposited on Stainless Steel Current Collectors
dc.creator.none.fl_str_mv Amade Rovira, Roger
Muyshegyan-Avetisyan, Arevik
Martí González, Joan
Pérez del Pino, Ángel
György, Eniko
Pascual Miralles, Esther
Andújar Bella, José Luis
Bertrán Serra, Enric
author Amade Rovira, Roger
author_facet Amade Rovira, Roger
Muyshegyan-Avetisyan, Arevik
Martí González, Joan
Pérez del Pino, Ángel
György, Eniko
Pascual Miralles, Esther
Andújar Bella, José Luis
Bertrán Serra, Enric
author_role author
author2 Muyshegyan-Avetisyan, Arevik
Martí González, Joan
Pérez del Pino, Ángel
György, Eniko
Pascual Miralles, Esther
Andújar Bella, José Luis
Bertrán Serra, Enric
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Grafè
Aparells electrònics
Acer inoxidable
Graphene
Electronic apparatus and appliances
Stainless steel
topic Grafè
Aparells electrònics
Acer inoxidable
Graphene
Electronic apparatus and appliances
Stainless steel
description Graphene nano-walls (GNWs) are promising materials that can be used as an electrode in electrochemical devices. We have grown GNWs by inductively-coupled plasma-enhanced chemical vapor deposition on stainless steel (AISI304) substrate. In order to enhance the super-capacitive properties of the electrodes, we have deposited a thin layer of MnO2 by electrodeposition method. We studied the effect of annealing temperature on the electrochemical properties of the samples between 70 °C and 600 °C. Best performance for supercapacitor applications was obtained after annealing at 70 °C with a specific capacitance of 104 F·g−1 at 150 mV·s−1 and a cycling stability of more than 14k cycles with excellent coulombic efficiency and 73% capacitance retention. Electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge/discharge measurements reveal fast proton diffusion (1.3 × 10−13 cm2·s−1) and surface redox reaction after annealing at 70 °C.
publishDate 2019
dc.date.none.fl_str_mv 2019
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/2445/158581
url https://hdl.handle.net/2445/158581
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/10.3390/ma12030483
Materials, 2019, vol. 12, num. 3, p. 483
https://doi.org/10.3390/ma12030483
dc.rights.none.fl_str_mv cc-by (c) Amade Rovira, Roger et al., 2019
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Amade Rovira, Roger et al., 2019
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Articles publicats en revistes (Física Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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