| 초록 |
Porous biocarbons with high specific surface area and narrow pore size distribution were successfully prepared from Giant Miscanthus (GM). The activation process was conducted by a simple one-step method with ZnCl2 impregnation because of relatively low activation temperature and the improvement of surface hydrophilicity. The ratio of ZnCl2/GM and activation temperatures were optimized based on the specific capacitance and salt adsorption capacity. The prepared samples were analyzed by SEM, BET, XRD, Raman and FTIR for the evaluation of physical and chemical properties. On the other hand, the electrochemical properties were measured by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. The specific capacitances of cyclic voltammetry were in the range of 167 – 228 F∙g-1 at 5 mV∙s-1 of scan rate. The adsorption and desorption behaviors showed excellent reproducibility under key operating conditions of flow rate, NaCl concentration and applied potential. |
