期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 128, 期 1-3, 页码 56-61出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2009.07.027
关键词
Ionic liquid; Electrochemical capacitors; Cu(II); Faradic pseudocapacitance; Redox
The electrochemical behaviors of Cu(II)-containing ionic liquid 1-ethyl-3-methylmidazolium tetrafluoroborate ([EMIm]BF4) were investigated in electrochemical capacitors, which used Cu(II)-containing ionic liquid as electrolyte, porous carbon as electrode materials. The cyclic voltammetry and constant current charge-discharge results indicated that a diffusion-controlling, reversible redox reaction of Cu(II) happened in the porous carbon. A lot of dendrites deposited in porous carbon electrode analyzed by SEM and XRD should be the polymeric Cu. The occurrence of redox reaction can improve electrochemical capacitor's capacity. The single electrode average specific capacitance can reach 225 F g(-1), about 108% higher than the one used pure ionic liquid as electrolyte. The increase of average specific capacitance indicated that the faradic pseudocapacitance associated with Cu species in the redox reactions had a considerable contribution to the total capacitance of electrochemical capacitors. (C) 2009 Elsevier Inc. All rights reserved.
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