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Enhanced electrocapacitive performance and high power density of polypyrrole/graphene oxide nanocomposites prepared at reduced temperature
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  • Journal title : Carbon letters
  • Volume 15, Issue 3,  2014, pp.171-179
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2014.15.3.171
 Title & Authors
Enhanced electrocapacitive performance and high power density of polypyrrole/graphene oxide nanocomposites prepared at reduced temperature
Mudila, Harish; Joshi, Varsha; Rana, Sweta; Zaidi, Mohmd. Ghulam Haider; Alam, Sarfaraz;
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An attempt was made to investigate the effect of the preparation temperature on the electrocapacitive performance of polypyrrole (PPY)/graphene oxide (GO) nanocomposites (PNCs). For this purpose, a series of PNCs were prepared at various temperatures by the cetyltrimethylammonium bromide-assisted dilute-solution polymerization of pyrrole in presence of GO (wt%) ranging from 1.0 to 4.0 with ferric chloride as an oxidant. The formation of the PNCs was ascertained through Fourier-transform infrared spectrometry, X-ray diffraction spectra, scanning electron microscopy and simultaneous thermogravimetric-differential scanning calorimetry. The electrocapacitive performance of the electrodes derived from sulphonated polysulphone-bound PNCs was evaluated through cyclic voltammetry with reference to Ag/AgCl at a scan rate (V/s) ranging from 0.2 and 0.001 in potassium hydroxide (1.0 M). The incorporation of GO into the PPY matrix at a reduced temperature has a pronounced effect on the electrocapacitive performance of PNCs. Under identical scan rates (0.001 V/s), PNCs prepared at render improved specific conductivity (526.33 F/g) and power density (731.19 W/Kg) values compared to those prepared at (217.69 F/g, 279.43 W/Kg). PNCs prepared at rendered a capacitive retention rate of ~96% during the first 500 cycles. This indicates the excellent cyclic stability of the PNCs prepared at reduced temperatures for supercapacitor applications.
reduced temperature;preparation polypyrrole;graphene oxide;sulphonated polysulphone;nanocomposites;supercapacitors;
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