Electrochemical doping of pure single-walled carbon nanotubes used as supercapacitor electrodes

被引:109
作者
Kimizuka, Osamu [2 ]
Tanaike, Osamu [1 ]
Yamashita, Junya [1 ]
Hiraoka, Tatsuki [1 ]
Futaba, Don N. [1 ]
Hata, Kenji [1 ]
Machida, Kenji [3 ]
Suematsu, Shunzo [3 ]
Tamamitsu, Kenji [3 ]
Saeki, Susumu [2 ]
Yamada, Yoshio [2 ]
Hatori, Hiroaki [1 ,2 ]
机构
[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058569, Japan
[2] Univ Fukui, Fac Engn, Fukui 9108507, Japan
[3] Nippon Chemi Con Corp, Takahagi 3188505, Japan
关键词
D O I
10.1016/j.carbon.2008.08.026
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Pure single-walled carbon nanotubes (SWCNTs) with little bundling show an excellent capacitor performance attributable to the intrinsic nature of the SWCNTs, and possess unusual electrochemical properties characterized by a butterfly shaped cyclic voltammogram which differs from those for conventional activated carbon electrodes. Electrochemical doping in semi-conductor nanotubes occurred at the interface between the electrolyte and the SWCNT surface. In situ measurements showed a remarkable increase of electric conductivity with the polarization from the flat band potential. Because of the potential dependence, the capacitance of the SWCNT electrodes was higher at the higher charging potentials. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1999 / 2001
页数:3
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