In situ fabrication of graphene decorated microstructured globe artichokes of partial molar nickel cobaltite anchored on a Ni foam as a high-performance supercapacitor electrode

摘要: By taking advantage of the splendid properties graphene (electrical conductivity) and transition metal oxides (pseudocapacitance nature), we have in situ fabricated novel microstructured globe artichokes a rGO/Ni0.3Co2.7O4 composite on nickel foam through simple surfactant free hydrothermal method followed by calcination process. The artichoke flower-like morphology is constructed hundreds self-assembled micropetals interconnected with several layers circles at base to form microspheres uniform dimension. as-obtained enhanced stability electrochemical performance hybrid electrode due its unique structure. Therefore, synergetic effects structure thus made binder allows better charge transport exhibits superb specific capacitance areal 1624 F g−1 2.37 cm−2 current density 2 A g−1. Moreover, increases from 1088 1728 end 7000 cycles, which indicates that material becomes active cycling. Furthermore, when power increased 16 times i.e. 0.5 8 kW kg−1 energy sinks 40 56.39 W h (i.e., 29% reduction only), suggesting remarkable for supercapacitor applications.