Preparation and Characterization of Aligned Carbon Nanotube-Ruthenium Oxide Nanocomposites for Supercapacitors
A novel type of ruthenium oxide (RuO2)‐modified multi‐walled carbon nanotube (MWNT) nanocomposite electrode (RuO2/MWNT) for supercapacitors has been prepared. The nanocomposites were formed by depositing Ru by magnetic‐sputtering in an Ar/O2 atmosphere onto MWNTs, which were synthesized on Ta plates...
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Published in | Small (Weinheim an der Bergstrasse, Germany) Vol. 1; no. 5; pp. 560 - 565 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
01.05.2005
WILEY‐VCH Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | A novel type of ruthenium oxide (RuO2)‐modified multi‐walled carbon nanotube (MWNT) nanocomposite electrode (RuO2/MWNT) for supercapacitors has been prepared. The nanocomposites were formed by depositing Ru by magnetic‐sputtering in an Ar/O2 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 MWNT 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.
Extra capacity: Modifying multi‐walled carbon nanotubes (MWNTs) by forming a composite with ruthenium oxide yields materials with high electronic capacitance (see SEM image). A near 50‐fold increase in capacitance, as compared to bare MWNTs is observed, which suggests such materials may find application as supercapacitors. |
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Bibliography: | ArticleID:SMLL200400137 ark:/67375/WNG-KWB3QK2T-9 istex:7AD97C2465FE0E3EE2AC9AC4C94D4338F2E0B665 These authors contributed equally. ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 1613-6810 1613-6829 |
DOI: | 10.1002/smll.200400137 |