新型炭材料2011，Vol.26Issue(4)：307-312,6.
电化学阻抗解析多壁碳纳米管/活性炭的电化学性能
The electrochemical performance of a multi-wall carbon nanotube/activated carbon mixture as the electrode of electric double layer capacitors analyzed by electrochemical impedance
摘要
Abstract
Activated carbon was prepared from petroleum coke by chemical activation. Multi-walled carbon nanotubes (MWCNTs) were mixed with the activated carbon to form the electrode material of electric double layer capacitors. According to the relative values of impedance and capacitance in electrochemical impedance, the available capacitance and energy dissipation from resistance were evaluated. Results showed that the real part of the capacitance for this mixture was higher than for activated carbon alone when activated carbon was mixed with a mass fraction 3%-15% MWCNTs. With the increase of MWCNT content, the imaginary part of the capacitance and its percentage decreases while the real part of capacitance and its percentage increases. It was revealed that the efficiency of energy storage was improved, the relaxation time constant was decreased, the characteristic of capacitance response versus frequency was improved and the electrode resistance was decreased by the addition of MWCNTs to activated carbon.关键词
活性炭/多壁碳纳米管/电化学阻抗谱/弛豫时间常数Key words
Activated carbon/ Multi-walled carbon nanotubes/ Electrochemical impedance spectroscopy/ Re-laxation time constant分类
通用工业技术引用本文复制引用
耿新,李峰,王大伟,成会明..电化学阻抗解析多壁碳纳米管/活性炭的电化学性能[J].新型炭材料,2011,26(4):307-312,6.基金项目
辽宁省教育厅科学基金(2008330),中国科学院王宽诚教育基金. （2008330）
