A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices

Detalhes bibliográficos
Autor(a) principal: Serrapede, Mara
Data de Publicação: 2020
Outros Autores: Fontana, Marco, Gigot, Arnaud, Armandi, Marco, Biasotto, Glenda [UNESP], Tresso, Elena, Rivolo, Paola
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.3390/ma13030594
http://hdl.handle.net/11449/198539
Resumo: A simple, low cost, and green method of hydrothermal synthesis, based on the addition of l-ascorbic acid (L-AA) as a reducing agent, is presented in order to obtain reduced graphene oxide (rGO) and hybrid rGO-MoO2 aerogels for the fabrication of supercapacitors. The resulting high degree of chemical reduction of graphene oxide (GO), confirmed by X-Ray Photoelectron Spectroscopy (XPS) analysis, is shown to produce a better electrical double layer (EDL) capacitance, as shown by cyclic voltammetric (CV) measurements. Moreover, a good reduction yield of the carbonaceous 3D-scaffold seems to be achievable even when the precursor of molybdenum oxide is added to the pristine slurry in order to get the hybrid rGO-MoO2 compound. The pseudocapacitance contribution from the resulting embedded MoO2 microstructures, was then studied by means of CV and electrochemical impedance spectroscopy (EIS). The oxidation state of the molybdenum in the MoO2 particles embedded in the rGO aerogel was deeply studied by means of XPS analysis and valuable information on the electrochemical behavior, according to the involved redox reactions, was obtained. Finally, the increased stability of the aerogels prepared with L-AA, after charge-discharge cycling, was demonstrated and confirmed by means of Field Emission Scanning Electron Microscopy (FESEM) characterization.
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spelling A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devicesAerogelsElectrochemical impedance spectroscopyL-ascorbic acidMolybdenum oxideReduced graphene oxideSupercapacitorsA simple, low cost, and green method of hydrothermal synthesis, based on the addition of l-ascorbic acid (L-AA) as a reducing agent, is presented in order to obtain reduced graphene oxide (rGO) and hybrid rGO-MoO2 aerogels for the fabrication of supercapacitors. The resulting high degree of chemical reduction of graphene oxide (GO), confirmed by X-Ray Photoelectron Spectroscopy (XPS) analysis, is shown to produce a better electrical double layer (EDL) capacitance, as shown by cyclic voltammetric (CV) measurements. Moreover, a good reduction yield of the carbonaceous 3D-scaffold seems to be achievable even when the precursor of molybdenum oxide is added to the pristine slurry in order to get the hybrid rGO-MoO2 compound. The pseudocapacitance contribution from the resulting embedded MoO2 microstructures, was then studied by means of CV and electrochemical impedance spectroscopy (EIS). The oxidation state of the molybdenum in the MoO2 particles embedded in the rGO aerogel was deeply studied by means of XPS analysis and valuable information on the electrochemical behavior, according to the involved redox reactions, was obtained. Finally, the increased stability of the aerogels prepared with L-AA, after charge-discharge cycling, was demonstrated and confirmed by means of Field Emission Scanning Electron Microscopy (FESEM) characterization.Center for Sustainable Future Technologies Istituto Italiano di Tecnologia, Via Livorno 60Department of Applied Science and Technology Politecnico di Torino, C. so Duca degli Abruzzi 24Interdisciplinary Laboratory of Electrochemistry and Ceramics (LIEC) Institute of Chemistry São Paulo State University-UNESPInterdisciplinary Laboratory of Electrochemistry and Ceramics (LIEC) Institute of Chemistry São Paulo State University-UNESPIstituto Italiano di TecnologiaPolitecnico di TorinoUniversidade Estadual Paulista (Unesp)Serrapede, MaraFontana, MarcoGigot, ArnaudArmandi, MarcoBiasotto, Glenda [UNESP]Tresso, ElenaRivolo, Paola2020-12-12T01:15:40Z2020-12-12T01:15:40Z2020-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.3390/ma13030594Materials, v. 13, n. 3, 2020.1996-1944http://hdl.handle.net/11449/19853910.3390/ma130305942-s2.0-85079621157Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterialsinfo:eu-repo/semantics/openAccess2021-10-22T14:02:56Zoai:repositorio.unesp.br:11449/198539Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:14:09.459239Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices
title A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices
spellingShingle A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices
Serrapede, Mara
Aerogels
Electrochemical impedance spectroscopy
L-ascorbic acid
Molybdenum oxide
Reduced graphene oxide
Supercapacitors
title_short A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices
title_full A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices
title_fullStr A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices
title_full_unstemmed A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices
title_sort A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices
author Serrapede, Mara
author_facet Serrapede, Mara
Fontana, Marco
Gigot, Arnaud
Armandi, Marco
Biasotto, Glenda [UNESP]
Tresso, Elena
Rivolo, Paola
author_role author
author2 Fontana, Marco
Gigot, Arnaud
Armandi, Marco
Biasotto, Glenda [UNESP]
Tresso, Elena
Rivolo, Paola
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Istituto Italiano di Tecnologia
Politecnico di Torino
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Serrapede, Mara
Fontana, Marco
Gigot, Arnaud
Armandi, Marco
Biasotto, Glenda [UNESP]
Tresso, Elena
Rivolo, Paola
dc.subject.por.fl_str_mv Aerogels
Electrochemical impedance spectroscopy
L-ascorbic acid
Molybdenum oxide
Reduced graphene oxide
Supercapacitors
topic Aerogels
Electrochemical impedance spectroscopy
L-ascorbic acid
Molybdenum oxide
Reduced graphene oxide
Supercapacitors
description A simple, low cost, and green method of hydrothermal synthesis, based on the addition of l-ascorbic acid (L-AA) as a reducing agent, is presented in order to obtain reduced graphene oxide (rGO) and hybrid rGO-MoO2 aerogels for the fabrication of supercapacitors. The resulting high degree of chemical reduction of graphene oxide (GO), confirmed by X-Ray Photoelectron Spectroscopy (XPS) analysis, is shown to produce a better electrical double layer (EDL) capacitance, as shown by cyclic voltammetric (CV) measurements. Moreover, a good reduction yield of the carbonaceous 3D-scaffold seems to be achievable even when the precursor of molybdenum oxide is added to the pristine slurry in order to get the hybrid rGO-MoO2 compound. The pseudocapacitance contribution from the resulting embedded MoO2 microstructures, was then studied by means of CV and electrochemical impedance spectroscopy (EIS). The oxidation state of the molybdenum in the MoO2 particles embedded in the rGO aerogel was deeply studied by means of XPS analysis and valuable information on the electrochemical behavior, according to the involved redox reactions, was obtained. Finally, the increased stability of the aerogels prepared with L-AA, after charge-discharge cycling, was demonstrated and confirmed by means of Field Emission Scanning Electron Microscopy (FESEM) characterization.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-12T01:15:40Z
2020-12-12T01:15:40Z
2020-02-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.3390/ma13030594
Materials, v. 13, n. 3, 2020.
1996-1944
http://hdl.handle.net/11449/198539
10.3390/ma13030594
2-s2.0-85079621157
url http://dx.doi.org/10.3390/ma13030594
http://hdl.handle.net/11449/198539
identifier_str_mv Materials, v. 13, n. 3, 2020.
1996-1944
10.3390/ma13030594
2-s2.0-85079621157
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Materials
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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