Impact of cell-voltage on energy and power performance of supercapacitors with single-walled carbon nanotube electrodes

被引：32
作者：
Izadi-Najafabadi, Ali [1 ]
Yamada, Takeo [1 ]
Futaba, Don N. [1 ]
Hatori, Hiroald [2 ]
Iijima, Sumio [1 ]
Hata, Kenji [1 ,3 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Nanotube Res Ctr, Tsukuba, Ibaraki 3058565, Japan
[2] Natl Inst Adv Ind Sci & Technol, Project Headquarters, Tsukuba, Ibaraki 3058565, Japan
[3] Japan Sci & Technol Agcy JST, Kawaguchi, Saitama 3320012, Japan
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 12期
基金：
日本科学技术振兴机构;
关键词：
Activated carbon; Carbon nanotubes; Energy; Power; Supercapacitors; ELECTROCHEMICAL CAPACITORS; STORAGE; GROWTH; AREA;
D O I：
10.1016/j.elecom.2010.09.020
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
We report the energy and power voltage-dependencies of supercapacitors using single-walled carbon nanotube electrodes. The energy density was dependent on the cell-voltage cubed (up to 4 V: E = 1.43 x V-3). The cubic relationship was attributed to the linear increase of the capacitance as a function of voltage, enabled by electrochemical doping. Furthermore, while up to 3.5 V, the maximum power rating of the nanotube electrodes increased as a function of the cell-voltage squared, beyond 3.5 V, a decline in power was observed as a result of depletion of the electrolyte's ions. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1678 / 1681
页数：4
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