Capacitance response of double-walled carbon nanotubes depending on surface modification

被引：46

作者：

Jang, In Young ^{[2
]}

Muramatsu, Hiroyuki ^{[1
]}

Park, Ki Chul ^{[2
]}

Kim, Yong Jung ^{[1
]}

Endo, Morinobu ^{[1
,2
]}

机构：

[1] Shinshu Univ, Inst Carbon Sci & Technol, Nagano 3808553, Japan

[2] Shinshu Univ, Fac Engn, Dept Elect & Elect Engn, Nagano 3808553, Japan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 04期

关键词：

EDLC; Supercapacitor; Double-walled carbon nanotube; Wettability; Acid treatment; SUPERCAPACITOR ELECTRODES;

D O I：

10.1016/j.elecom.2009.01.021

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The capacitive behaviors of high-purity double-walled carbon nanotubes (DWNTs) were investigated before and after oxidation using nitric acid (HNO3). The electrodes prepared from the HNO3-oxidized DWNTs have exhibited higher capacitances than the pristine nanotube electrode in both aqueous and non-aqueous systems, despite the deterioration of their specific surface area after HNO3 oxidation. The superiority of the HNO3-oxidized DWNTs in capacitance properties is caused by the variations of surface wettability and the interstitial pore structure of nanotube bundles, which result from the introduction of polar oxygen functional groups onto the nanotube surface by HNO3 oxidation. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：719 / 723

页数：5

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