Synthesis of MnO2/RGO by a One-Step Hydrothermal Method

Manganese dioxide (MnO2)/reduced graphene oxide (RGO) nanocomposites were fabricated by a novel one-step hydrothermal method. Potassium permanganate, manganese sulfate and graphene oxide (GO) were used as oxygenant, reductant and complex agent, respectively. The morphology and microstructure of the as-synthesized sample were characterized by transmission electron microscopy (TEM), Raman spectroscopy, and X-ray diffraction (XRD). The synthetic method can avoid some complicated procedures and remarkably enhance the electrochemical behaviors of manganese dioxide compared with other methods. Without consumption of carbon source in the synthesis of the nanocomposites, it can dramatically enlarge active-sites between manganese dioxide and graphene oxide; at the same time, it can also greatly increase the utilization of manganese dioxide. Therefore, it is a promising potential method to prepare the compounds which can be used as an effective electrode material for ultracapacitor.