Preparation and electrochemical properties of mesoporous Mn2O3 electrode for supercapacitor applications

초록

Supercapacitors are considered next generation technology for energy storage system. Transition metal oxide is the promising active material as an electrode material for supercapacitor. Among the metal oxide, manganese oxide is a reasonable candidate for supercapacitor due to large theoretical specific capacitance and various oxidation state. In addition, mesoporous materials are suitable for use as electrode materials for supercapacitor owing to specific surface area and pore volume. In this research, mesoporous manganese oxide was synthesized by surfactant assisted electrodeposition. Proper amount of surfactant added to aqueous solution with 10 mM Mn(Ac)2 for synthesis of mesoporous film. Crystallinity and phase of manganese oxide was characterized X-ray diffraction (XRD) and the mesoporous structure of the synthesized electrodes were measured by small angle X-ray diffraction (SAXRD). The morphology and surface property were obtained by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical properties were determined by cyclic voltammetry (CV) and charge-discharge curve in a standard three electrode system using a potentiostat.