MoS2 ultrathin nanoflakes for high performance supercapacitors: room temperature chemical bath deposition (CBD)

摘要

Homogeneous ultrathin nanoflakes of MoS2 thin films have been successfully developed by simple and low cost room temperature chemical bath deposition (CBD) method which further applied as electrode material for high-performance supercapacitors. The surface morphological analysis revealed uniform growth of MoS2 nanoflakes on whole substrate surface. Structural analysis confirms the formation of rhombohedral crystal structure of MoS2. The electrochemical performances were tested by cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance techniques. Different electrolytes were tested in order to find suitable electrolyte for MoS2 thin films. In addition, the effect of electrolyte concentrations on supercapacitive properties of MoS2 thin film was investigated. Thus, MoS2 ultrathin nanoflakes electrode exhibits excellent electrochemical performances with maximum specific capacitance of 576 F g(-1) at 5 mV s(-1) and good cycling stability of 82% over 3000 cycles.