New synthesis method for a core-shell composite based on α-Bi2O3@PPy and its electrochemical behavior as supercapacitor electrode.

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Autor(es): dc.creatorXavier, Farlon Felipe Silva-
Autor(es): dc.creatorBruziquesi, Carlos Giovani Oliveira-
Autor(es): dc.creatorFagundes, Wélique Silva-
Autor(es): dc.creatorMatsubara, Elaine Yoshiko-
Autor(es): dc.creatorRosolen, Jose Mauricio-
Autor(es): dc.creatorSilva, Adilson Cândido da-
Autor(es): dc.creatorCanobre, Sheila Cristina-
Autor(es): dc.creatorAmaral, Fábio Augusto do-
Data de aceite: dc.date.accessioned2025-08-21T15:29:10Z-
Data de disponibilização: dc.date.available2025-08-21T15:29:10Z-
Data de envio: dc.date.issued2019-04-26-
Data de envio: dc.date.issued2019-04-26-
Data de envio: dc.date.issued2019-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/11150-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.21577/0103-5053.20180192-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1016402-
Descrição: dc.descriptionNew composite based on polypyrrole (PPy) and bismuth oxide (α-Bi2O3) was investigated as supercapacitor electrode. The α-Bi2O3 was obtained by hydrothermal route at 500 °C for 2 h. Cyclic voltammetry was used to electropolymerize PPy on graphite electrode (GE) or on GE/α-Bi2O3. The X-ray diffraction profile of Bi2O3 revealed the α-Bi2O3 monoclinic structure with space group P21/c. The scanning and transmission electron microscopy images showed that PPy coated α-Bi2O3. Raman spectra showed that PPy inhomogeneously coated α-Bi2O3, but it was still possible to obtain a α-Bi2O3@PPy core-shell hybrid composite with highly ordered α-Bi2O3 with electronic interaction between the oxide and the polymer chain of the polymer. The GE/α-Bi2O3@PPy composite electrode (type I supercapacitor) displayed a predominantly capacitive profile with low impedance values and good electrochemical stability after 50 charge and discharge cycles. The specific capacitance of α-Bi2O3@PPy composite was found in the range of 634 to 301 F g-1 to gravimetric current of 3 and 10 A g-1, respectively.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsaberto-
Direitos: dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License. Fonte: O próprio artigo-
Palavras-chave: dc.subjectConducting polymers-
Palavras-chave: dc.subjectBismuth oxide-
Palavras-chave: dc.subjectSupercapacitors-
Palavras-chave: dc.subjectElectrochemical devices-
Título: dc.titleNew synthesis method for a core-shell composite based on α-Bi2O3@PPy and its electrochemical behavior as supercapacitor electrode.-
Aparece nas coleções:Repositório Institucional - UFOP

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