| 초록 |
We investigated the effects of the surface modification of activated carbon (AC) on oxygen functional group control and its electrochemical properties. The oxygen group on the AC surface can be released as CxOy form gas in the process of high-power and high-temperature conditions. For stability and reliability of the electrode, it is necessary to control the oxygen group. Three commercial ACs were selected and thermally treated at 600-1000°C for 1-3 hours under N2 gas atmosphere. The surface characteristic of the ACs was performed using an XPS. The microstructural changes were observed using an XRD. The textural feature was measured using N2/77K adsorption isotherms, and BET and BJH equations were used to calculate pore characteristics. The electrochemical performance of the EDLC was analyzed using cyclic voltammetry, impedance spectroscopy, and a galvanostatic charge/discharge test. |
