Electrochemical behavior of metallic and semiconducting single-wall carbon nanotubes for electric double-layer capacitor
Electrochemical behavior of metallic and semiconducting single-wall carbon nanotubes for electric double-layer capacitor
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DOI：
10.1016/j.carbon.2011.09.062
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发表时间：
2012-03
期刊：
影响因子：
10.9
通讯作者：
Yasuhiro Yamada;Takeshi Tanaka;K. Machida;S. Suematsu;Kenji Tamamitsu;H. Kataura;H. Hatori
中科院分区：
文献类型：
--
作者：
Yasuhiro Yamada;Takeshi Tanaka;K. Machida;S. Suematsu;Kenji Tamamitsu;H. Kataura;H. Hatori
研究了用琼脂糖凝胶层析分离的金属和半导体单壁碳纳米管作为双电层电容器(EDLC)电极的电化学行为。由于离子掺杂到半导体碳纳米管中，半导体碳纳米管的循环伏安曲线表现为两性行为，类似于掺杂导电聚合物。随着平带电位的升高或降低，半导体单壁碳纳米管的电容增加，而金属单壁碳纳米管的电容略有增加。由于电容的限制，半导体单壁碳纳米管在高电位下的高电容对EDLC是有利的。
Electrochemical behavior of metallic and semiconducting single-wall carbon nanotubes (SWCNTs) separated by agarose gel chromatography was analyzed as electrodes of electric double-layer capacitor (EDLC). Due to the doping of ions to semiconducting SWCNTs, the cyclic voltammogram of semiconducting SWCNTs showed amphoteric behavior, which is analogous to that of dopable conducting polymers. As the potential was increased or decreased from the flat band potential, the capacitance of semiconducting SWCNTs was increased, but that of metallic SWCNTs was slightly increased. The high capacitance of semiconducting SWCNTs at the high potential is beneficial for EDLC due to the possible limitation of capacitance.