Synthesis of Manganese Oxide for Supercapacitor: the effect of precursor on electro-catalytic performance

초록

Supercapacitors have drawn intensive attention in recent years owing to their high specific power, long cycle life, simple principle, and rapid charging and discharging at high power densities. Electrode consisting of transition metal oxide has shown superior electrochemical properties for supercapacitor applications. Manganese oxides have been considered as one of the most effective supercapacitor material owing to their low cost and long durability. Also, it is well known that electrochemical and physicochemical properties of manganese oxide can be easily varied by using different precursors. In this work, Manganese oxides were successfully synthesized via double solvent precipitation method using various precursors such as MnCl2, MnSO4, and Mn(Ac)2. The physicochemical properties of as-prepared catalysts were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and Brunauer?Emmett?Teller (BET). Cyclic voltammetry (CV) was conducted in a standard three electrode system in 0.5 M sodium sulfate solution in order to measure the electrochemical properties.