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Journal of Electrochemistry ›› 2017, Vol. 23 ›› Issue (2): 217-225.doi: 10.13208/j.electrochem.161246

• Special Issue in Honor of Professor Zhaowu Tian on His 90th Birthday • Previous Articles     Next Articles

Novel Composites between Nano-Structured Nickel Sulfides and Three-Dimensional Graphene for High Performance Supercapacitors

Xiaomin Wang1*, Huanglin Dou1, Zhen Tian1, Jiujun Zhang2*   

  1. 1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 2. College of Science, and Institute for Sustainable Energy, Shanghai University, Shanghai 200444, China
  • Received:2016-12-06 Revised:2017-01-15 Online:2017-04-28 Published:2017-02-09
  • Contact: Xiaomin Wang, Jiujun Zhang E-mail:wangxiaomin@tyut.edu.cn; jiujun@shaw.ca
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (Grant No. 51372160 and 51172152).

Abstract:

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.

Key words: three-dimensional graphene, nickel sulfide, supercapacitor, electrochenical energy storage

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