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A kind of sandwich-like NiCo2O4/rGO/NiO heterostructure composite has been successfully anchored on nickel foam substrate via a three-step hydrothermal method with successive annealing treatment.The smart combination of NiCo2O4,reduced graphene oxide (rGO),and NiO nanostructure in the sandwich-like nano architecture shows a promising synergistic effect for supercapacitors with greatly enhanced electrochemical performance.For serving as supercapacitor electrode,the NiCo2O4/rGO/NiO heterostructure materials exhibit remarkable specific capacitance of 2644 mF cm-2 at current density of 1 mA cm-2,and excellent capacitance retentions of 97.5％ after 3000 cycles.It is expected that the present heterostructure will be a promising electrode material for high-performance supercapacitors.