Citation: CAI Xiao-Qing, JI Zhen-Yuan, SHEN Xiao-Ping, WANG Ji-Heng, SHEN Xiao-Han, CHENG Shi-Qing. Synthesis of Hollow Hexagonal Nickel-Cobalt Sulfide/RGO Nanocomposite for Supercapacitor Application[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(1): 26-32. doi: 10.11862/CJIC.2017.017 shu

Synthesis of Hollow Hexagonal Nickel-Cobalt Sulfide/RGO Nanocomposite for Supercapacitor Application

1.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013
2.
School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003

Corresponding author: SHEN Xiao-Ping, xiaopingshen@163.com
Received Date: 14 May 2016
Revised Date: 11 November 2016

Figures(8)

The uniform nanocomposites of hollow hexagonal nickel-cobalt sulfide/reduced graphene oxide (HHNCS/RGO) are synthesized through a two-step hydrothermal route, and they were characterized by XRD, SEM, TEM and Raman. It is found that nickel-cobalt sulfides with hollow hexagonal structure were uniformly anchored on the surface of RGO sheets. The as-prepared nanocomposites as supercapacitor electrodes present good electrochemical performances. The HHNCS/RGO nanocomposites deliver a maximum specific capacitance of 927 F·g^-1 at the current density of 1 A·g^-1, and still exhibit a high specific capacitance of 724 F·g^-1 at the big current density of 20 A·g^-1, indicating their good rate capability. In addition, the specific capacitance retains 93% of its initial value after 2 000 charge-discharge cycles at the current density of 5 A·g^-1, indicating their high cycling stability. The enhanced capacitive performance is attributed to the fact that RGO can not only improve the conductivity of HHNCS/RGO nanocomposites but also work as support to disperse the HHNCS nanosheets effectively.
- nickel-cobalt sulfide,
- graphene,
- composite,
- synthesis,
- supercapacitor
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沈阳化工大学材料科学与工程学院沈阳 110142