Amaryllis-like NiCo2S4 nanoflowers for high-performance flexible carbon-fiber-based solid-state supercapacitor. Issue 10 (1st August 2016)

• Record Type: Journal Article
• Authors: Hussain, Shahid; Liu, Tianmo; Javed, Muhammad Sufyan; Aslam, Nimra; Shaheen, Nusrat; Zhao, Shuoqing; Zeng, Wen; Wang, Jinxing
• Is Part Of: Ceramics international. Volume 42:Issue 10(2016)
• Page Start: 11851
• Page End: 11857
• Publication Date: 2016-08-01
• Subjects: NiCo2S4 -- Novel nanostructure -- Energy storage -- Good cycle stability -- Supercapacitor; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.04.107
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Low-cost dynamic materials for Faradaic redox reactions are needed for high-energy storage supercapacitors. A simple and cost-effective hydrothermal process was employed to synthesize amaryllis-like NiCo2 S4 nanoflowers. The sample was characterized by X-ray powder diffraction, Brunauer–Emmett–Teller method, scanning electron microscopy, and transmission electron microscopy. NiCo2 S4 nanoflowers 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 NiCo2 S4 nanoflowers resulted in high specific energy and power. Thus, NiCo2 S4 nanoflowers are promising pseudocapacitive materials for low-cost and lightweight solid-state supercapacitors.