A facile and green synthesis of a MoO2-Reduced graphene oxide aerogel for energy storage devices
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , |
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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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 |
|
_version_ |
1808129177001394176 |