Improved electrochemical performance of rGO-wrapped MoO${}_3$ nanocomposite for supercapacitors

A low-cost hydrothermal method has been employed to synthesize phase pure α-MoO${}_3$ and MoO${}_3$/rGO nanocomposite electrodes with novel structures for high-performance supercapacitors. Both nanocomposites exhibited orthorhombic layered structure. Pure MoO${}_3$ exhibited nanorod-like morphology, whereas MoO${}_3$/rGO nanocomposite showed flower-like structure. The TEM studies reveal that the GO reduced to rGO and wrapped to the MoO${}_3$ nanorods. The pure MoO${}_3$ nanorods electrode demonstrated a specific capacitance of 331 F/g at a current density of 1 A/g. The MoO${}_3$/rGO nanocomposite electrode with unique flower-like structure showed enhanced electrochemical performance with a specific capacitance of 486 F/g at a current density of 1 A/g with 92% capacity retention even after 1000 discharge cycles.