One-step electrochemical synthesis of MoS2/graphene composite for supercapacitor application

In this study, an MoS 2 /graphene composite is fabricated from bulk MoS 2 and graphite rod via a facile electrochemical exfoliation method. The as-prepared samples are characterized by X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy and ultraviolet-visible spectroscopy techniques to confirm the formation of the MoS 2 /graphene composite. The electrochemical behavior of the MoS 2 /graphene composite is evaluated through cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. It exhibits high specific capacitance of 227 F g −1 as compared with the exfoliated graphene (85 F g −1 ) and exfoliated MoS 2 (70 F g −1 ) at a current density of 0.1 A g −1 . This can be attributed to the synergistic effect between graphene and MoS 2 . Moreover, it displays high electrochemical stability and low electrical resistance. Graphical abstract