Enhanced electrocapacitive performance and high power density of polypyrrole/graphene oxide nanocomposites prepared at reduced temperature

서지정보

· 발행기관 : 한국탄소학회
· 수록지 정보 : Carbon Letters / 15권 / 3호
· 저자명 : Harish Mudila, Varsha Joshi, Sweta Rana, Mohmd. Ghulam Haider Zaidi, Sarfaraz Alam

목차

1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusion
References

초록

An attempt was made to investigate the effect of the preparation temperature on the electrocapacitiveperformance of polypyrrole (PPY)/graphene oxide (GO) nanocomposites (PNCs).For this purpose, a series of PNCs were prepared at various temperatures by the cetyltrimethylammoniumbromide-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 PNCswas ascertained through Fourier-transform infrared spectrometry, X-ray diffraction spectra,scanning electron microscopy and simultaneous thermogravimetric-differential scanningcalorimetry. The electrocapacitive performance of the electrodes derived from sulphonatedpolysulphone-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). Theincorporation of GO into the PPY matrix at a reduced temperature has a pronounced effecton the electrocapacitive performance of PNCs. Under identical scan rates (0.001 V/s), PNCsprepared at 10 ± 1°C render improved specific conductivity (526.33 F/g) and power density(731.19 W/Kg) values compared to those prepared at 30 ± 1°C (217.69 F/g, 279.43 W/Kg).PNCs prepared at 10 ± 1°C rendered a capacitive retention rate of ~96% during the first 500cycles. This indicates the excellent cyclic stability of the PNCs prepared at reduced temperaturesfor supercapacitor applications.

영어초록

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 10 ± 1°C render improved specific conductivity (526.33 F/g) and power density
(731.19 W/Kg) values compared to those prepared at 30 ± 1°C (217.69 F/g, 279.43 W/Kg).
PNCs prepared at 10 ± 1°C 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.

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