Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 5, Issue 5, Pages 1218-1225Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8qi00172c
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Funding
- Key research and development program of Binzhou University [2017ZDL03]
- National Natural Science Foundation of China [U1662119]
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In this study, cobalt-doped nickel sulfide nanomaterials are synthesized. The experimental results show that cobalt is successfully doped into the lattice of NiS2. Co-doping causes the hollow sphere sulphides to break down and favors the formation of NixCo1-xS2 nanostructures with high-density active edge sites. The Ni0.75Co0.25S2 sample exhibits a high specific capacitance of 2141.9 F g(-1) at a current density of 2 A g(-1) due to its fluffy characteristics and edge site-enriched nanostructure. The asymmetric supercapacitor based on Ni0.75Co0.25S2 exhibits a high energy density (54.9 Wh kg(-1)) and stable cycling durability with 85.1% capacitance retention after 4000 cycles.
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