Rapid microwave-assisted solid-state obtention of Mn3O4 and its electrochemical characterization for application as supercapacitor electrodes

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Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorSilva, João Pedro-
Autor(es): dc.creatorIrikura, Kallyni-
Autor(es): dc.creatorBiaggio, Sonia R.-
Autor(es): dc.creatorBocchi, Nerilso-
Autor(es): dc.creatorRocha-Filho, Romeu C.-
Data de aceite: dc.date.accessioned2025-08-21T22:57:55Z-
Data de disponibilização: dc.date.available2025-08-21T22:57:55Z-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2022-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s11581-022-04627-y-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/240200-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/240200-
Descrição: dc.descriptionA rapid and facile microwave-assisted method coupled with a mild mechanical treatment is proposed to obtain Mn3O4 with good properties to be used as a supercapacitor material. Mn3O4 was produced by thermal decomposition of ε-MnO2 using microwave irradiation in a practical setup and a domestic microwave oven. XRD results, supported by other physical characterizations such as TG/DTA and FTIR and Raman spectroscopy analyses, attested that Mn3O4 was obtained as a single phase after only 5 min of microwave heating. After submitting an oxide sample to a mild mechanical treatment in an adapted ball-mill setup for 30 min, SEM micrographs and BET analyses revealed a particle size in the range of 200–600 nm and a fivefold increase of the specific surface area. The pseudocapacitive behavior of electrodes prepared with the thus obtained Mn3O4 was analyzed by cyclic voltammetry in a 0.1 mol L–1 Na2SO4 aqueous solution. Galvanostatic charge and discharge tests of these electrodes were performed in the 1.0 to 5.0 A g–1 range in the same electrolyte; at 1.0 A g–1, they presented an initial specific capacitance of about 160 F g–1 and good electrochemical stability up to 5000 cycles.-
Descrição: dc.descriptionDepartment of Chemistry Federal University of São Carlos (UFSCar), SP-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University (UNESP), SP-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University (UNESP), SP-
Formato: dc.format3963-3974-
Idioma: dc.languageen-
Relação: dc.relationIonics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectEnergy storage materials-
Palavras-chave: dc.subjectMicrowave solid-state synthesis-
Palavras-chave: dc.subjectPrecursor ε-MnO2-
Palavras-chave: dc.subjectPseudocapacitance-
Palavras-chave: dc.subjectSolid-state reactions-
Palavras-chave: dc.subjectSupercapacitor cathode material-
Título: dc.titleRapid microwave-assisted solid-state obtention of Mn3O4 and its electrochemical characterization for application as supercapacitor electrodes-
Tipo de arquivo: dc.typelivro digital-
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