In situ synthesis of pure CoS@180°C and RGO/CoS@180°Cnanocomposite was synthesized through hydrothermal method. The synthesized nanocomposite were characterized by spectroscopic (XRD, FTIR, RAMAN, SEM and HRTEM) and electrochemical techniques. The XRDspectra confirm the hexagonal structure of CoS@180°C and RGO/CoS@180°Cnanocomposite. All the diffraction peaks are very well coincid with JCPDScard No. 75-0605. FTIR spectrum shows the characteristic peaks are spotted at 422, 553 and 1092 cm-1 for RGO/CoS@180°C. The Raman spectrum also confirms the formation of CoS@180°C and RGO/CoS@180°Cnanocomposite. The flower like shapes was seen through SEM and HRTEM images. The higher specific capacitance values of RGO/CoS@180°C electrode than CoS electrode is due to RGO nanosheets support the huge surface area with good mesoporosity, which increasesthe electron and ion mobility during the redox process.

hexagonal; XPS; EDAX; SEM; HRTEM;Specific capacitance.