High-cell-voltage supercapacitor of carbon nanotube/carbon cloth operating in neutral aqueous solution

被引：124

作者：

Hsu, Yu-Kuei ^{[1
]}

Chen, Ying-Chu ^{[2
]}

Lin, Yan-Gu ^{[3
]}

Chen, Li-Chyong ^{[2
,4
]}

Chen, Kuei-Hsien ^{[2
,3
]}

机构：

[1] Natl Dong Hwa Univ, Dept Optoelect Engn, Hualien, Taiwan

[2] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10764, Taiwan

[3] Acad Sinica, Inst Atom & Mol Sci, Taipei, Taiwan

[4] Natl Taiwan Univ, Ctr Emerging Mat & Adv Devices, Taipei 10764, Taiwan

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 08期

关键词：

ELECTROCHEMICAL SUPERCAPACITORS; ELECTRODES; CAPACITORS;

D O I：

10.1039/c1jm14716a

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：

Dense and entangled carbon nanotubes (CNTs) directly grown on the carbon cloth (CC) have been employed as hierarchical supercapacitor electrodes in neutral aqueous electrolyte of Na2SO4. XPS and Raman results show the CNTs with large amounts of oxygen functionalities and high degree of disorder, respectively, after treatment of electrochemical oxidation. The voltammograms and galvanostatic charge/discharge are performed to probe the capacitive characteristics of CNTs/CC electrode. Moreover, the symmetric supercapacitor of CNTs/CC exhibits an excellent cyclability over 10 000 cycles and high energy density of 27.8 Wh kg(-1), with a wide cell potential of 2 V and a large specific capacitance of 210 F g(-1).

引用

收藏

页码：3383 / 3387

页数：5

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