Preparation and characterization of aligned carbon nanotube-ruthenium oxide nanocomposites for supercapacitors

被引：215

作者：

Ye, JS

Cui, HF

Liu, X

Lim, TM

Zhang, WD

Sheu, FS

机构：

[1] Inst Mat Res & Engn, Singapore 117602, Singapore

[2] Natl Univ Singapore, Dept Sci Biol, Singapore 117543, Singapore

[3] Natl Univ Singapore, Univ Scholars Programme, Singapore 119260, Singapore

来源：

SMALL | 2005年 / 1卷 / 05期

关键词：

carbon nanotubes; electrochemical properties; nanocomposites; oxides; supercapacitors;

D O I：

10.1002/smll.200400137

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel type of ruthenium oxide (RuO2)-modified multi-walled carbon nanotube (MWNT) nanocomposite electrode (RuO2/MWNT) for super-capacitors has been prepared. The nanocomposites were formed by depositing Ru by magnetic-sputtering in an Ar/O-2 atmosphere onto MWNTs, which were synthesized on Ta plates by chemical vapor deposition. Cyclic voltammetry, chronopotentiometry, and electrochemical impedance measurements were applied to investigate the performance of the RuO2/MWNT nanocomposite electrodes. The capacitance of the M WNT electrodes in 1.0 m H2SO4 is significantly increased from 0.35 to 16.94 mF cm(-2) by modification with RuO2. The RuO2 film on the surface of the nanotubes is composed of small crystal grains with tilted bundle-like microstructures, as observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The results demonstrate a promising route to prepare RuO2/MWNT-based double-layer supercapacitors.

引用

页码：560 / 565

页数：6

共 37 条

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