A Facile Synthesis of High Performing Mn_xO_y-Rgo Hybrid Composite for Potential Supercapacitor Application

In this study, the facile synthesis procedure of Mn x O y -rGO hybrid and the variation of its electrochemical performance on varying the KMnO 4 concentration have been elucidated. The as prepared hybrid was synthesized by adopting a one-step hydrothermal process at 180°C for 24h. The controlled growth of mixed manganese oxide (Mn x O y ) was achieved for 0.5 mM KMnO 4 , and it showed a specific capacitance of 280 Fg -1 at 1 Ag -1 current density using 0.5 M Na 2 SO 4 electrolyte. The incorporation of the Mn x O y into the conductive rGO layers successfully prevented the self-agglomeration of rGO nanosheets. It was found that an appropriate incorporation of Mn x O y provided the fast electrolytic ion transportation in and on between the rGO layers by reducing the solution resistance, (R s ) down to 4 ohm (Ω). Hence, it is expected that the synthesis procedure for the fabrication of Mn x O y -rGO has prospects as the high performing supercapacitor electrode materials.