| 초록 |
Supercapacitors have recently attracted a great attention as energy storage devices because of their high power density, fast charge time, and long lifetime. In this study, we have manufactured a series of sulfonated poly(1,3,4-oxadiazole) (sPOD)-based carbon nanofibers via electrospinning and carbonization, and have investigated their structures and electrochemical performance as supercapacitor electrodes. FT-IR, EDS and Raman data revealed the structural change from sPOD to carbonized nanofibers and the enhanced perfection of graphitic structures during the carbonization at 700-1000 °C. Accordingly, the electrical conductivity of the carbon nanofibers increased from 1.25×10-6 to 4.9 S/cm with increasing the carbonization temperature. From the cyclic voltammetric curves, the carbon nanofibers obtained at 1000 °C were found to have a high specific capacitance of ~120 F/g at a scan rate 10 mV/s. |
