MnO2/C core-shell composite as electrode material in supercapacitors

Abstract

Supercapacitors have been focused for their great capacitance, fast charging-discharging with big current, and very long cycle life since they were born. In recent years, with their applications in national security science technology, environmental reservation and so on, the studies on them have become one of the hot spots in the strategic field. This paper presents a preparation that KMnO₄ and Na₂S₂O₃ · 5H₂O as raw materials, we synthesized MnO₂/C core-shell composite material by a hydrothermal method, and analysis on its electrochemical properties. We found that, through the hydrothermal method, we could synthesize MnO₂/C core-shell composite material, and the average capacity was 180.2F/g.