Preparation of NiS₂ nanosheet and its application in asymmetric supercapacitor

Authors

Yuan-you Wang, Department of Chemical Engineering, Yangzhou Polytechnic Institute, Yangzhou, 225127;Follow
Ya-nan Liu, Department of Chemical Engineering, Yangzhou Polytechnic Institute, Yangzhou, 225127;
Dang-qin JIN, Department of Chemical Engineering, Yangzhou Polytechnic Institute, Yangzhou, 225127;

Corresponding Author

Yuan-you Wang(wangyy@ypi.edu.cn)

Abstract

In this work, the NiS₂ nanosheets have been synthesized using Ni(OH)₂ as a precursor through a sacrificial template method. The microstructure and chemical composition of as-prepared NiS₂ were characterized by XRD, EDS, BET, SEM and TEM techniques. The results showed that both Ni(OH)₂ and NiS₂ were composed of nanoplates. The electrochemical tests revealed that NiS₂ exhibited the high specific capacitance of 1067.3 F•g^-1 at a current density of 1 A•g^-1 and excellent rate performance. Furthermore, in order to evaluate the practical application of NiS₂, an asymmetric supercapacitor, NiS₂ as the positive electrode and AC as the negative electrode, displayed high energy density of 38.4 Wh•kg^-1 with a power density of 0.8 kW•kg^-1. Meanwhile, the asymmetric supercapacitor showed a superior cycling performance and 93.7% of the specific capacitance was retained after 3000 charge-discharge cycles.

Graphical Abstract

Keywords

sacrificial template method, NiS2, Asymmetric supercapacitor

DOI Link

https://doi.org/10.13208/j.electrochem.170103

Publication Date

2017-12-28

Online Available Date

2017-02-13

Revised Date

2017-02-10

Received Date

2017-01-03

Recommended Citation

Yuan-you Wang, Ya-nan Liu, Dang-qin JIN. Preparation of NiS₂ nanosheet and its application in asymmetric supercapacitor[J]. Journal of Electrochemistry, 2017 , 23(6): 667-674.
DOI: 10.13208/j.electrochem.170103
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss6/5