期刊
CERAMICS INTERNATIONAL
卷 42, 期 10, 页码 11851-11857出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.04.107
关键词
NiCo2S4; Novel nanostructure; Energy storage; Good cycle stability; Supercapacitor
资金
- National Natural Science Foundation [11332013]
Low-cost dynamic materials for Faradaic redox reactions are needed for high-energy storage super capacitors. A simple and cost-effective hydrothermal process was employed to synthesize amaryllis-like NiCo2S4 nanoflowers. The sample was characterized by X-ray powder diffraction, Brunauer-Emmett-Teller method, scanning electron microscopy, and transmission electron microscopy. NiCo2S4 nano flowers were coated onto carbon fiber fabric and used as a binder-free electrode to fabricate a solid-state supercapacitor compact device. The solid-state supercapacitor exhibited excellent electrochemical performance, including high specific capacitance of 360 F g(-1) at scan rate of 5 mV s(-1) and high energy density of 25 W h kg(-1) at power density of 168 W kg(-1). In addition, the supercapacitor possessed high flexibility and good stability by retaining 90% capacitance after 5000 cycles. The high conductivity and Faradic-redox activity of NiCo2S4 nanoflowers resulted in high specific energy and power. Thus, NiCo2S4 nanoflowers are promising pseudocapacitive materials for low-cost and lightweight solid-state super capacitors. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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