Electrochemical doping of pure single-walled carbon nanotubes used as supercapacitor electrodes
Electrochemical doping of pure single-walled carbon nanotubes used as supercapacitor electrodes
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DOI：
10.1016/j.carbon.2008.08.026
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发表时间：
2008-11-01
期刊：
影响因子：
10.9
通讯作者：
Hatori, Hiroaki
中科院分区：
文献类型：
--
作者：
Kimizuka, Osamu;Tanaike, Osamu;Hatori, Hiroaki
纯的单壁碳纳米管（SWCNTs）与很少捆绑显示出优异的电容器性能归因于单壁碳纳米管的固有性质，并具有不寻常的电化学性能，其特征在于由蝴蝶形的循环伏安图，不同于那些传统的活性炭电极。电化学掺杂在半导体纳米管发生在电解质和单壁碳纳米管表面之间的界面。原位测量表明，从平带电位极化的电导率显着增加。由于电位依赖性，SWCNT电极的电容在较高的充电电位下较高。(C)2008爱思唯尔有限公司保留所有权利。
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.