New Synthesis Method for a Core-Shell Composite Based on α-Bi2O3 @PPy and its Electrochemical Behavior as Supercapacitor Electrode
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 ºC 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.
Main Authors: | Xavier,Fárlon F. S., Bruziquesi,Carlos G. O., Fagundes,Wélique S., Matsubara,Elaine Y., Rosolen,José M., Silva,Adilson C., Canobre,Sheila C., Amaral,Fábio A. |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Química
2019
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532019000400727 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Influence of electrode preparation on the electrochemical behaviour of carbon-based supercapacitors
by: Ruiz Ruiz, Vanesa, et al.
Published: (2007-06) -
Effect of the thermal treatment of carbon-based electrodes on the electrochemical performance of supercapacitors
by: Ruiz Ruiz, Vanesa, et al.
Published: (2008-02-25) -
Influence of potassium hydroxide activation of graphene oxide on electrochemical performance of electrodes for supercapacitors
by: Quintero Martínez, Y., et al.
Published: (2019-05-28) -
Biocarbon monoliths as supercapacitor electrodes: Influence of wood anisotropy on their electrical and electrochemical properties
by: Cuña, Andrés, et al.
Published: (2014-08-21) -
Effect of unequal load of carbon xerogel in electrodes on the electrochemical performance of asymmetric supercapacitors
by: Gómez Calvo, Esther, et al.
Published: (2013-12-19)