Rapid Production of Mn(3)O(4)/rGO as an Efficient Electrode Material for Supercapacitor by Flame Plasma

Benefiting from good ion accessibility and high electrical conductivity, graphene-based material as electrodes show promising electrochemical performance in energy storage systems. In this study, a novel strategy is devised to prepare binder-free Mn(3)O(4)-reduced graphene oxide (Mn(3)O(4)/rGO) electrodes. Well-dispersed and homogeneous Mn(3)O(4) nanosheets are grown on graphene layers through a facile chemical co-precipitation process and subsequent flame procedure. This obtained Mn(3)O(4)/rGO nanostructures exhibit excellent gravimetric specific capacitance of 342.5 F g(−1) at current density of 1 A g(−1) and remarkable cycling stability of 85.47% capacitance retention under 10,000 extreme charge/discharge cycles at large current density. Furthermore, an asymmetric supercapacitor assembled using Mn(3)O(4)/rGO and activated graphene (AG) delivers a high energy density of 27.41 Wh kg(−1) and a maximum power density of 8 kW kg(−1). The material synthesis strategy presented in this study is facile, rapid and simple, which would give an insight into potential strategies for large-scale applications of metal oxide/graphene and hold tremendous promise for power storage applications.