%0 Generic %A Xavier, Fárlon F. S. %A Bruziquesi, Carlos G. O. %A Fagundes, Wélique S. %A Matsubara, Elaine Y. %A Rosolen, José M. %A Silva, Adilson C. %A Canobre, Sheila C. %A Amaral, Fábio A. %D 2019 %T New Synthesis Method for a Core-Shell Composite Based on α-Bi2O3 @PPy and its Electrochemical Behavior as Supercapacitor Electrode %U https://scielo.figshare.com/articles/dataset/New_Synthesis_Method_for_a_Core-Shell_Composite_Based_on_-Bi2O3_PPy_and_its_Electrochemical_Behavior_as_Supercapacitor_Electrode/7865795 %R 10.6084/m9.figshare.7865795.v1 %2 https://scielo.figshare.com/ndownloader/files/14648192 %2 https://scielo.figshare.com/ndownloader/files/14648195 %2 https://scielo.figshare.com/ndownloader/files/14648198 %2 https://scielo.figshare.com/ndownloader/files/14648201 %2 https://scielo.figshare.com/ndownloader/files/14648204 %2 https://scielo.figshare.com/ndownloader/files/14648207 %2 https://scielo.figshare.com/ndownloader/files/14648210 %2 https://scielo.figshare.com/ndownloader/files/14648216 %2 https://scielo.figshare.com/ndownloader/files/14648219 %2 https://scielo.figshare.com/ndownloader/files/14648225 %2 https://scielo.figshare.com/ndownloader/files/14648231 %2 https://scielo.figshare.com/ndownloader/files/14648240 %2 https://scielo.figshare.com/ndownloader/files/14648246 %K conducting polymers %K bismuth oxide %K supercapacitors %K electrochemical devices %X

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.

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