One-Pot Synthesis of MnO2/Reduced Graphene Oxide Via Hydrothermal Routes for Supercapacitor Applications

Manganese dioxide (MnO 2 ) is a promising supercapacitor electrode material due to its high theoretical capacitance, low cost and environmental compatibility. However, the electrochemical performance of MnO 2 is often limited by low electrical conductivity of MnO 2 . The MnO 2 /carbon composites have been successfully demonstrated as an effective way to improve overall electrical conductivity of MnO 2 based materials. In this study, we report MnO 2 /reduced graphene oxide (rGO) composites for high performance supercapacitor applications. The MnO 2 /rGO composites exhibited 381F/g at a charge/discharge current density of 5 A/g, which was significantly higher as compared to that of pure MnO 2 (140 F/g at a charge/discharge current density of 5 A/g). This result indicates that improved capacitance of the MnO 2 /rGO composites benefited from the incorporated rGO properties, such as high electrical conductivity and large surface area.