期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 18, 期 3, 页码 665-672出版社
SPRINGER
DOI: 10.1007/s10008-013-2303-0
关键词
Coal tar residues; Chemical activation; Activated carbon; Ferroferric oxide; Supercapacitor
资金
- Open Project of Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education [11zxgk11]
- Foundation from the Technology R&D Program of Sichuan Province [2010GZ0300]
Oxygen-rich activated carbon with a three-dimensional network structure was prepared by chemical activation of coal tar residues with potassium hydroxide and subsequent carbonization treatment. Nanostructured Fe3O4/AC composites were then prepared by simple chemical coprecipitation method and were used as active electrode materials for supercapacitors. The electrochemical behaviors of Fe3O4/AC nanocomposites were characterized by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy in 1.0 M Na2SO3 electrolyte. It was shown that the specific capacitance of Fe3O4/AC nanocomposites reached 150 F g(-1) at a current density of 3.0 A g(-1) and was a great improvement over Fe3O4 or AC alone. Furthermore, as-prepared Fe3O4/AC nanocomposites exhibited long cycle life without obvious capacitance fading even after 1,000 charge/discharge cycles. Compared with pure Fe3O4 and AC, the significant enhanced electrochemical performance of Fe3O4/AC nanocomposites could be reasonably attributed to the positive synergetic effect between Fe3O4 and AC.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据