Abstract
A unique nanoarchitecture has been established involving polypyrrole (PPy)and graphene nanosheets by in situ polymerization. The structural aspect ofthe nanocomposite has been determined by Raman spectroscopy. Atomicforce microscopy reveals that the thickness of the synthesized graphene is ∼ 2 nm. The dispersion of the nanometer-sized PPy has been demonstrated through transmissionelectron microscopy and the electrochemical performance of the nanocomposite has beenillustrated by cyclic voltammetry measurements. Graphene nanosheet serves as a supportmaterial for the electrochemical utilization of PPy and also provides the path for electrontransfer. The specific capacitance value of the nanocomposite has been determined to be267 F g − 1 at a scanrate of 100 mV s − 1 compared to 137 mV s − 1 for PPy, suggesting the possible use of the nanocomposite as a supercapacitor electrode.After 500 cycles, only 10% decrease in specific capacitance as compared to initialvalue justifies the improved electrochemical cyclic stability of the nanocomposite.
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