| 초록 |
Chemical modification of graphene nanosheets by KOH was examined as a way to enhance the specific capacity of graphene nanosheets in supercapacitor. KOH activation of cheap and available natural precursors, such as coals and pitch-derived carbonaceous materials has often been used. This method efficiently develops the micropores, and allows various pore size distributions. In this paper, we report the modification of the graphene nanosheets using concentrated KOH solution and their resulted electrochemical performance as supercapacitor electrode materials. These results demonstrated the importance and great potential of graphene oxide in the development of high-performance supercapacitor based on KOH activation. The morphology, structure of the composites were examined by Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM). Electrochemical properties were characterized by Cyclic Voltammetry (CV) and Charge-Discharge(CD) in 6M KOH electrolte. |
