Journal
RSC ADVANCES
Volume 6, Issue 105, Pages 103517-103522Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra23071g
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Funding
- National Natural Science Foundation of China [21471086]
- Social Development Foundation of Ningbo [2014C50013]
- K. C. Wong MagnaFund in Ningbo University
- Tongji University
- Young Thousand Talented Program
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Transition metal sulfides have complex valence states and exhibit excellent properties and promising applications in supercapacitors. NiS2/ZnS hollow spherical nanocomposites have been successfully synthesized via a facile MOF-derived self-sacrificing route. The synthesis process involves solvothermal method for preparation of Ni/Zn-BDC MOF and subsequently chemical sulfidation treatment to convert into NiS2/ZnS hollow nanospheres. When evaluated as electrode materials in supercapacitor, the NiS2/ZnS hollow nanospheres exhibit high capacitance of 1198 F g(-1) at the current density of 1 A g(-1). Moreover, an asymmetric supercapacitor based on NiS2/ZnS hollow nanospheres as the positive electrode and activated carbon (AC) as the negative electrode achieves an energy density of 28.0 W h kg(-1) at a power density of 478.9 kW kg(-1). The results suggest the NiS2/ZnS hollow nanospheres are promising electrode materials for high-performance supercapacitors.
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