Research Article Open Access
Volume 3 | Issue 2 | DOI: https://doi.org/10.33696/Nanotechnol.3.035

Electrochemical Supercapacitors Based on Hydrous RuO2/oxidized Multi-walled Carbon Nanotube Composites

  • 1Korea Carbon Industry Promotion Agency, Jeonju 54853, South Korea
  • 2Carbon Composite Energy Nanomaterials Research Center, Woosuk University, Wanju 55338, South Korea
  • 3Department of Organic Materials & Fiber Engineering, Jeonbuk National University, Jenoju 567, South Korea
+ Affiliations - Affiliations

Corresponding Author

Byoung-Suhk Kim, kbsuhk@jbnu.ac.kr

Min-Kang Seo, seomk721@kcarbon.or.kr

Received Date: September 01, 2022

Accepted Date: September 26, 2022


Electrochemical properties of ruthenium oxide (RuO2)/oxidized multi-walled carbon nanotube (MWCNT) (RuO2/MWCNT) composite electrodes in supercapacitors were investigated. The electrodes were prepared by impregnating MWCNTs with different concentrations of RuCl3•xH2O solution, followed by chemical reduction and annealing at 150°C under a nitrogen atmosphere. RuO2 deposited on the MWCNTs was hydrous and amorphous when annealed at 150°C. Transmission electron microscopy (TEM) and Energy dispersive X-ray spectroscopy (EDX) analyses showed that the RuO2 particles had a uniform size distribution, confirming the presence of RuO2 in the prepared composites. Cyclic voltammetry analysis suggested that the specific capacitance of the 10 wt% RuO2/MWCNT composite electrode was significantly higher than those of the pristine MWCNT and 5 wt% RuO2/MWCNT electrodes in the same medium. This superior performance is probably attributable to the pseudocapacitance of amorphous RuO2.


Electrochemical properties, RuO2, Multi-walled carbon nanotubes, Supercapacitors

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