Journal
MATERIALS LETTERS
Volume 214, Issue -, Pages 194-197Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.12.014
Keywords
Supercapacitor; Co3S4 nanoneedles; NiCo2O4 nanosheets; Electrodes
Funding
- National Natural Science Foundation of China [51602131, 21477050, 21522603]
- Excellent Youth Foundation of Jiangsu Scientific Committee [BK20160526, BK20140011]
- Six Talents Peak Project in Jiangsu Province [XCL-025]
- Jiangsu Province Postdoctoral Science Foundation [1601059C]
- China Postdoctoral Science Foundation [2016 M600368]
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Co3S4 nanoneedle decorated NiCo2O4 nanosheets are successfully prepared by a two-step hydrothermal process for supercapacitors. The NiCo2O4 nanosheets are served as ideal backbones to enhance the surface area and provide more electroactive sites for faradaic reaction. The optimized NiCo2O4/Co3S4 electrode shows a high specific capacity of 1468 F g(-1) at the current density of 1 A g(-1). When assembled an asymmetric supercapacitor, the device exhibits high energy density of 14.0 Wh kg(-1) at 400 W kg(-1), and retains 84.7% of the capacity after 3000 cycles. (C) 2017 Published by Elsevier B.V.
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