Corresponding Author

Xiaomin Wang(wangxiaomin@tyut.edu.cn);
Jiujun Zhang(jiujun@shaw.ca)


In this paper, a three-dimensional graphene (3DG) network grown on nickel foam was employed as a template for synthesizing graphene-based composite materials of supercapacitor electrode. The composites (crystal Ni3S2 nanorods on the surface of 3DG (abbreviated as Ni3S2/3DG)) were obtained through a one-step hydrothermal reaction. The morphological and structural evolution of the Ni3S2/3DG composites were investigated by SEM, TEM, XRD and Raman spectroscopy. Detailed electrochemical characterization showed that the Ni3S2/3DG-coated electrodes exhibited both a specific capacitance as high as 1825 F·g-1 at 5 mV·s-1 and a discharge capacitance as high as 517 F·g-1 at 10 mA. Remarkably, a high cycling performance (~ 100% capacitance retention after 1000 cycles) is achieved at a current density of 20 mA.

Graphical Abstract


three-dimensional graphene, nickel sulfide, supercapacitor, electrochenical energy storage

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