Modification Of Polypyrrole/Graphene Oxide Composites And Their Application In Supercapacitors

Nanocomposites of Polypyrrole (PPY) and Graphene Quantum Dots(GQD),Polypyrrole (PPY) and Graphene Oxide (GO) were successfully obtained. With theaddition of GQD or GO, the pyrrole monomer growed on them as a soft template,forming nanocomposites, which are different from the spherical particles of PPY.Using a mechanical compressing technique, we prepared the composites electrodesand systematically characterized their electrochemical properties. Also, we tried toadd some CTAB in the PPY/GO composites.We found that the PPY/GQD composites with ratio of50:1, PPY to GQD,showed a good and competitive specific capacitance of485F/g at a scan rate of0.005V/s, which is higher than that of PPY alone. The attenua tion of the specificcapacitance is about2%after2000cycles at a scan rate of0.05V/s. The high specificcapacitance and good stability of the PPY/GQD nanocomposites are very promisingfor applications in electrochemical supercapacitor.