Frequency response characteristic of single-walled carbon nanotubes as supercapacitor electrode material

被引：112

作者：

Liu, C. G. ^{[1
,2
,3
]}

Liu, M. ^{[1
]}

Li, F. ^{[1
]}

Cheng, H. M. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang natl Lab Mat Sci, Shenyang 110016, Peoples R China

[2] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China

[3] Dalian Univ Technol, State Key Lab Mat Modificat Laser Ion & Elect Bea, Dalian 116024, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 14期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2907501

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Impedance analysis was employed to study the frequency response characteristics of supercapacitors utilizing single-walled carbon nanotubes (SWNTs) as electrode material. The knee frequency is around 631 Hz for the electrochemically oxidized SWNT supercapacitor, much higher than that of the as-prepared one (around 316 Hz) and the common activated carbon supercapacitor (< 1 Hz). The good frequency response observed in this work is due to the introduction of nanosized mesopores and oxygen-containing groups formed during the electrochemical oxidization of SWNTs. The capacitance of electrochemically oxidized SWNT supercapacitor is 113 F/g, which is much higher than the value of the as-prepared one (20 F/g). (C) 2008 American Institute of Physics.

引用

页数：3

共 20 条

[1] Role of surface chemistry on electric double layer capacitance of carbon materials [J].

Bleda-Martínez, MJ ;

Maciá-Agulló, JA ;

Lozano-Castelló, D ;

Morallón, E ;

Cazorla-Amorós, D ;

Linares-Solano, A .

CARBON, 2005, 43 (13) :2677-2684

[2]

Conway B. E., 1999, ELECTROCHEMICAL SUPE

[3] Purification of single-wall carbon nanotubes by electrochemical oxidation [J].

Fang, HT ;

Liu, CG ;

Chang, L ;

Feng, L ;

Min, L ;

Cheng, HM .

CHEMISTRY OF MATERIALS, 2004, 16 (26) :5744-5750

[4] Supercapacitor electrodes from multiwalled carbon nanotubes [J].

Frackowiak, E ;

Metenier, K ;

Bertagna, V ;

Beguin, F .

APPLIED PHYSICS LETTERS, 2000, 77 (15) :2421-2423

[5] Electrophoretic deposition (EPD) of hydrous ruthenium oxides with PTFE and their supercapacitor performances [J].

Jang, Jong H. ;

Machida, Kenji ;

Kim, Yuri ;

Naoi, Katsuhiko .

ELECTROCHIMICA ACTA, 2006, 52 (04) :1733-1741

[6] Synthesis of polypyrrole and carbon nano-fiber composite for the electrode of electrochemical capacitors [J].

Kim, JH ;

Sharma, AK ;

Lee, YS .

MATERIALS LETTERS, 2006, 60 (13-14) :1697-1701

[7] Principles and applications of electrochemical capacitors [J].

Kötz, R ;

Carlen, M .

ELECTROCHIMICA ACTA, 2000, 45 (15-16) :2483-2498

[8] Surface properties of fluorinated single-walled carbon nanotubes [J].

Lee, YS ;

Cho, TH ;

Lee, BK ;

Rho, JS ;

An, KH ;

Lee, YH .

JOURNAL OF FLUORINE CHEMISTRY, 2003, 120 (02) :99-104

[9]

Liu C, 2000, ADV MATER, V12, P1190, DOI 10.1002/1521-4095(200008)12:16<1190::AID-ADMA1190>3.0.CO

[10]

2-C

← 1 2 →