Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/11150
Title: New synthesis method for a core-shell composite based on α-Bi2O3@PPy and its electrochemical behavior as supercapacitor electrode.
Authors: Xavier, Farlon Felipe Silva
Bruziquesi, Carlos Giovani Oliveira
Fagundes, Wélique Silva
Matsubara, Elaine Yoshiko
Rosolen, Jose Mauricio
Silva, Adilson Cândido da
Canobre, Sheila Cristina
Amaral, Fábio Augusto do
Keywords: Conducting polymers
Bismuth oxide
Supercapacitors
Electrochemical devices
Issue Date: 2019
Citation: XAVIER, F. F. S. et al. New synthesis method for a core-shell composite based on α-Bi2O3@PPy and its electrochemical behavior as supercapacitor electrode. Journal of the Brazilian Chemical Society, São Paulo, v. 30, n. 4, p. 727-735, abr. 2019. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532019000400727&lng=en&nrm=iso&tlng=en>. Acesso em: 7 mar. 2019.
Abstract: New 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.
URI: http://www.repositorio.ufop.br/handle/123456789/11150
metadata.dc.identifier.doi: http://dx.doi.org/10.21577/0103-5053.20180192
ISSN: 1678-4790
metadata.dc.rights.license: This is an open-access article distributed under the terms of the Creative Commons Attribution License. Fonte: O próprio artigo
Appears in Collections:DEQUI - Artigos publicados em periódicos

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