| 초록 |
Recently, graphene nanosheets (GNS), two-dimensional carbon nanomaterials, have received significant research attention in energy storage devices due to the unique electronic, mechanical properties and large surface areas. In the present work, we have synthesized hierarchical graphene/polypyrrole (GNS/PPy) nanosheet composites through in-situ chemical oxidation polymerization method using thermally annealed GNS. Synthesized PPy/graphene composites are characterized using various characterization tools. Successful formation of sheet like PPy on the surface of thermally annealed GNSs is characterized using transmission electron microscopy (TEM). Supercapacitor electrodes based on these hierarchical PPy/graphene composites are fabricated and characterized for its electrochemical performances. This study reveals that these composite materials exhibit superior electrochemical rate capability and cyclic stability, which are the primary requirements for electrochemical capacitors. |
