Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5438276 | Ceramics International | 2017 | 28 Pages |
Abstract
The development of wearable electronics has created a surge of interest in designing flexible energy storage device with high energy density and long lifespan. In this work, we have successfully fabricated a flexible asymmetric supercapacitor (ASC) based on the NiCo2S4@NiCo2O4 nanocolumn arrays (NCAs). The nickel cobalt sulfide/oxide core-shell nanostructures were rationally synthesized through a facile stepwise approach. The NiCo2S4@NiCo2O4 NCAs based electrode delivered a high specific capacitance of 2258.9 F gâ1 at a current density of 0.5 A gâ1. The as-assembled flexible ASC device exhibited a high energy density of 44.06 Wh kgâ1, a high power density of 6.4 kW kgâ1, and excellent cycling stability by retaining 92.5% after 6000 cycles. Excitingly, the electrochemical property of the ASC device could be maintained under severe bending, indicating superior flexibility and mechanical stability. The NiCo2S4@NiCo2O4 core-shell NCAs possess enormous potential for future wearable electronic applications.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Siyi Cheng, Tielin Shi, Yuanyuan Huang, Xiangxu Tao, Junjie Li, Chaoliang Cheng, Guanglan Liao, Zirong Tang,