1. Flexible coaxial-type fiber solid-state asymmetrical supercapacitor based on Ni3S2 nanorod array and pen ink electrodes.
- Author
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Wen, Jian, Li, Songzhan, Zhou, Kai, Song, Zengcai, Li, Borui, Chen, Zhao, Chen, Tian, Guo, Yaxiong, and Fang, Guojia
- Subjects
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NICKEL sulfide , *SUPERCAPACITORS , *NANORODS , *ASYMMETRY (Chemistry) , *ELECTRODES , *FIBERS - Abstract
Fiber supercapacitors have attracted public attentions because of their merits of relatively high capacitance density, flexibility and easy integration with various electronic devices. In this work, a flexible coaxial-type fiber solid-state asymmetrical supercapacitor (ASC) based on Ni 3 S 2 nanorod array electrode and pen ink electrode was successfully fabricated. The Ni 3 S 2 nanorod array electrode was synthesized by directly growing Ni 3 S 2 nanorod arrays on a nickel wire through a facile hydrothermal method and the pen ink electrode as negative electrode was synthesized by a simple dip-coating method. The solid-state ASC device presents a stable voltage window of 1.4 V and behaves a high specific capacitance of 34.9 F g −1 (87.25 F cm −1 ) at a scan rate of 10 mV s −1 . Compared with the symmetric supercapacitor (SSC) based on Ni 3 S 2 electrodes, the ASC device provide an increased energy density of 8.2 Wh kg −1 (0.81 mWh cm −3 ) at the power density of 214.6 W kg −1 (21.12 mW cm −3 ). In addition, the ASC device also exhibits excellent electrochemical stability with 93.1% of initial specific capacitance after 3000 consecutive cycles and good mechanical stability. These encouraging results present its great potential in flexible solid-state energy storage devices. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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