Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 40, Issue 11, Pages 2248-2255Publisher
SPRINGER
DOI: 10.1007/s11664-011-1749-z
Keywords
Polypyrrole; graphene oxide; electrical conductivity; capacitance; supercapacitor
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Funding
- Department of Atomic Energy (DAE)
- Board of Research in Nuclear Sciences (BRNS), India [2008/37/37/BRNS/2470]
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An electrode material based on polypyrrole (PPy) doped with graphene oxide (GO) sheets was synthesized via in situ polymerization of pyrrole in the presence of GO in various proportions (5% and 10%). The synthesized samples were characterized by Fourier-transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-vis) absorption spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), x-ray diffraction (XRD) analysis, and electrical conductivity measurements. FTIR spectroscopy and XRD revealed the interaction between GO and PPy. The direct-current (DC) electrical conductivity (75.8 S/cm) of the prepared composites was dramatically enhanced compared with pure PPy (1.18 S/cm). High specific capacitance of PPy/GO composite of 421.4 F/g was obtained in the potential range from 0 V to 0.50 V at 2 mA compared with 237.2 F/g for pure PPy by galvanostatic charge-discharge analysis. Incorporation of GO into the PPy matrix has a pronounced effect on the electrical conductivity and electrochemical capacitance performance of PPy/GO nanocomposites.
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