| 초록 |
Supercapacitors are promising candidate for energy storage device due to its high power density, long-life cycle and stability. In this study, we have investigated the activated carbon and solid-state polymer electrolyte based supercapacitor. The electrochemical performances of symmetric supercapacitor are evaluated by using cyclic voltammetry(CV), electrochemical impedance spectroscopy(EIS), and galvanostatic charge/discharge tests(GCD). The morphology of the electrodes surface also were analyzed through scanning electron microscope(SEM). The specific capacitance of the supercapacitor was 4.14F at current density of 1A g-1. The Nyquist plot of the supercapacitor showed low initial resistance of 0.20 Ω at the open circuit potential(100 mV), and it features high ion transport performance between electrode and electrolyte interface. In addition, the galvanostatic charge/discharge of the supercapacitor exhibited symmetrical curves which demonstrated the electrochemical behavior of EDLC. |
