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题名: Electrochemical capacitive properties of CNT fibers spun from vertically aligned CNT arrays
作者: Lianxi Zheng1; Zhou JY(周金元)1,2; Feng Yu1; Yani Zhang1; Jonh Hock Lye Pang1; Lianxi1
收录类别: SCI
出版日期: 2012
刊名: Journal of Solid State ELectrochemistry
卷号: 16, 期号:5, 页码:1775-1780
出版者: Springer
中文摘要: Due to their lightweight, large surface area; excellent electrical conductivity; and mechanical strength, carbon nanotube (CNT) fibers show great potentials in serving as both electrode materials and current collectors in supercapacitors. In this paper, the capacitive properties of both asspun CNT fibers and electrochemically activated CNT fibers have been investigated using cyclic voltammetry and electrochemical impedance spectroscopy. It is found that the as-spun CNT fibers exhibit a very low specific capacitance of 2.6 Fg−1, but electrochemically activated CNT fibers show considerably improved specific capacitance. The electrochemical activation has been realized by cyclic scanning in a wide potential window. Different electrolytes have also been examined to validate the applicability of our carbon materials and the activation mechanism. It is believed that such an activation process can significantly improve the surface wetting of the CNT fibers by electrolyte (aqueous Na2SO4 solution). The cycling stability and rate-dependence of the capacitance have been studied, and the results suggest practical applications of CNT fibers in electrochemical supercapacitors.
关键词: Supercapacitor ; Carbon Nanotube ; CNT fiber ; Electrochemical activation
作者部门: School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
通讯作者: Lianxi Zheng
语种: 英语
DOI: 10.1007/s10008-011-1606-2
第一机构:
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/189734
Appears in Collections:物理科学与技术学院_期刊论文

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作者单位: 1.School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
2.School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, People’s Republic of China

Recommended Citation:
Lianxi Zheng,Zhou JY,Feng Yu,et al. Electrochemical capacitive properties of CNT fibers spun from vertically aligned CNT arrays[J]. Journal of Solid State ELectrochemistry,2012,16(5):1775-1780.
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