Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7998874 | Journal of Alloys and Compounds | 2015 | 6 Pages |
Abstract
The FexCy/C composite as negative electrode for supercapacitor has been prepared facilely through one-step solid state reaction. The SEM images show that the FexCy exhibits polyhedron shape with average size of 50 nm and distributes randomly on the wire-like carbon substrate. The XRD patterns reveal that the FexCy is composed of Fe1.88C0.12 and Fe15.1C. The electrochemical results demonstrate that the as-prepared product exhibits enlarged specific capacitance (274.68 F/g at a current density of 2.5 A/g), which is almost four times as high as that of carbon (79 F/g) and higher than those of other Fe-based materials. Furthermore, its low charge-transfer resistance is 0.12 Ω. The capacitance can remain 95.24% of its initial capacitance at a high current density of 30 A/g after 1000 cycles. From the results above, we can conclude that the obtained FexCy/C is a promising negative electrode material for supercapacitor.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Minglei Yan, Yadong Yao, Jiqiu Wen, Weidong Fu, Lu Long, Meng Wang, Xiaoming Liao, Guangfu Yin, Zhongbing Huang, Xianchun Chen,