Journal
NANO ENERGY
Volume 26, Issue -, Pages 425-437Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.05.046
Keywords
Li-ion battery; Supercapacitor; Nickel sulfide; Graphene; Nanoparticles; Nanoprisms
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Funding
- Institute of Bioengineering and Nanotechnology (Biomedical Research Council, Agency for Science, Technology and Research, Singapore)
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Nickel sulfide and graphene-wrapped nickel sulfide nanoprisms were synthesized using a facile one-pot method and evaluated as anode materials for Li-ion batteries, and as supercapacitor electrodes. Graphene wrapping significantly improved the performance of nickel sulfide both as Li-ion battery anode and supercapacitor electrode. As Li-ion battery anode, graphene-wrapped nickel sulfide nanoprisms achieved an excellent specific capacity of over 1200 mAh/g after 100 cycles, and showed improved rate capability. As supercapacitor electrode, nickel sulfide nanoprisms achieved a specific capacitance of over 1000 F/g at a current density of 5 A/g, which is one of the best results reported for nickel sulfide. However, specific capacitance was much lower at 10 and 20 A/g. Introducing graphene significantly improved the specific capacitance of nickel sulfide at high current densities. (C) 2016 Elsevier Ltd. All rights reserved.
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