Rapid Hydrothermal Green Synthesis of Core-Shell Shaped Nico2o4@Mos2/Rgo Ternary Composites for High-Performance Electrode Materials

Reduced graphene oxide (RGO)-based composites are promising materials for supercapacitors due to their high specific surface area and electrical conductivity. This paper reports a ternary composite electrode materials based on RGO, nickel cobaltite (NiCo 2 O 4 ), and molybdic sulfide (MoS 2 ), using chemical insertion method to solve the problem of repacking RGO layers. MoS 2 /RGO conductive substrates have been fabricated by a rapid green hydrothermal synthesis approach, NiCo 2 O 4 @MoS 2 /RGO core-shell shaped composites were prepared with MoS 2 /RGO substrates. NiCo 2 O 4 @MoS 2 /RGO ternary composites were composed of uniformly distributed MoS 2 /RGO conductive substrates with core-shell NiCo 2 O 4 microspheres. The as-fabricated core-shell shaped NiCo 2 O 4 @MoS 2 /RGO composites as electrode materials for supercapacitor exhibited high specific capacitance of 946 F g -1 at 1 A g -1 , enhanced rate capability, and excellent electrochemical stability with 87.3% retention after 5000 continuous charge-discharge cycles. The desirable integrated performance enables it to be a promising electrode material for the electrochemical supercapacitor.