Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7888780 | Ceramics International | 2018 | 8 Pages |
Abstract
The exploration of high performance supercapacitors has received emerging the worldwide research interests in satisfying the gradually increased energy consumption. In this paper, we adopt a facile hydrothermal strategy to synthesize ternary FeCo2O4 directly on nickel foam. A series of structure such as nanowires, nanoflake@nanowire hetero-structure and hierarchical nanospheres have been achieved via modulating the synthetic time. The morphology and structure of the as-prepared samples are characterized by using scanning electron microscopy and X-ray diffraction spectroscopy. The relationship between the detail processing parameters and electrochemical performance are also revealed by cyclic voltammetry, galvanostatic charge-discharge measurements, cycle stability tests and electrochemical impedance spectroscopy. Notably, the as-prepared nanoflake@nanowire hetero-structure exhibits a high specific capacitance of about 969Â FÂ gâ1 at 2Â AÂ gâ1 in alkaline aqueous solution and a remarkable cycling stability (91% capacity retention after 2000 cycles). The excellent supercapacitors performance of nanoflake@nanowire hetero-structure can be attributed to the high conductivity, large active area as well as robust architectures that derive from structural synergetic effects. Furthermore, a symmetric all solid-state supercapacitor has been fabricated by using nanoflake@nanowire hetero-structure as both the anode and cathode electrodes. The as-fabricated supercapacitor delivers excellent electrochemical performance. It's anticipated that FeCo2O4 would be a promising material for electrochemical energy storage applications.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Guanghua Xu, Zhen Zhang, Xiang Qi, Xiaohui Ren, Shuhua Liu, Qiong Chen, Zongyu Huang, Jianxin Zhong,