Facile microwave synthesis of cerium oxide@molybdenum di-sulphide@reduced graphene oxide ternary composites as high performance supercapacitor electrode

Abstract

• Novel CeO 2 /MoS 2 /rGO (CeMG) ternary composites using microwave method is proposed. • CeMG shows excellent specific capacitance of 635 F.g −1 as compared to CeO 2 . • CeMG shows 88.9% capacitance retained after 10,000 cycles at 20 A.g −1 . There is a huge requirement for renewable energy resources to avoid the usage of fossil fuel attracted the researchers to work on the energy storage devices, such as supercapacitors. Herein, the novel synthesis of CeO 2 @MoS 2 @rGO (CeMG) ternary composite by two step microwave synthetic route that will be employed as an outstanding electrode material for supercapacitor. In particular, the morphology studies confirm that the cerium oxide has spherical morphology with the controlled size in the range of 12–15 nm embedded with the layered sheets of MoS 2 and reduced graphene oxide. The CeMG composites exhibit excellent specific capacitance of 635 F g −1 which is achieved at the current density of 1 A g −1 compared to the pure CeO 2 . In addition, prolonged cyclic stability with 88.9% capacitance is retained after 10,000 cycles of charging and discharging.