Facile one-step hydrothermal preparation of molybdenum disulfide/carbon composite for use in supercapacitor

A mesoporous molybdenum disulfide/carbon (MoS 2 /C) composite with flower-like morphology resulting from the decoration of carbon by MoS 2 interlaced nanosheets was synthesized by a facile hydrothermal route, and utilized for the electrode material of supercapacitor . The morphologies and structures of materials were characterized by field emission scanning electron microscopy , X-ray diffraction, Raman spectrum and N 2 adsorption–desorption isotherm. Electrochemical properties of materials were evaluated by cyclic voltammetry , galvanostatic charge/discharge and electrochemical impedance spectroscopy tests of two-electrode supercapacitors . The results indicate that the complex of carbon and MoS 2 can increase the electrical conductivity and can get thinner MoS 2 nanosheets leading to the increment of specific surface area , which result in the improvement in the electrochemical performances of material. The specific capacitance of MoS 2 /C composite reaches 201.4 F g −1 at a current density of 0.2 A g −1 in a two-electrode supercapacitor , which is higher than those of pure MoS 2 and carbon. Additionally, the MoS 2 /C-based supercapacitor exhibits high rate capability and long cyclic durability.