Amaryllis-like NiCo2S4 nanoflowers for high-performance flexible carbon-fiber-based solid-state supercapacitor

作者：Hussain, Shahid^*; Liu, Tianmo; Javed, Muhammad Sufyan; Aslam, Nimra; Shaheen, Nusrat; Zhao, Shuoqing; Zeng, Wen; Wang, Jinxing

来源：Ceramics International, 2016, 42(10): 11851-11857.

DOI：10.1016/j.ceramint.2016.04.107

• NiCo2S4
• Novel nanostructure
• Energy storage
• Good cycle stability
• Supercapacitor

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.

• 出版日期2016-8-1
• 单位重庆大学