Carbon nanotube/RuO2 nanocomposite electrodes for supercapacitors

Jong Hyeok Park, Jang Myoun Ko, O. Ok Park

Research output: Contribution to journalArticle

177 Citations (Scopus)

Abstract

Electrochemical characteristics of electrodes for supercapacitors built from RuO2/multiwalled carbon nanotube (CNT) nanocomposites have been investigated. Capacitances have been estimated by cyclic voltammetry at different scan rates from 5-50 mV/s. Electrostatic charge storage as well as pseudofaradaic reactions of RuO2 nanoparticles have been affected by the surface functionality of CNTs due to the increased hydrophilicity. Such hydrophilicity enables easy access of the solvated ions to the electrode/electrolyte interface, which increases faradaic reaction site number of RuO2 nanoparticles. The specific capacitance of RuO2/pristine CNT nanocomposites based on the combined mass was about 70 F/g (RuO2: 13 wt % loading), and the specific capacitance based on the mass of RuO2 was 500 F/g. However, the specific capacitance of RuO2/hydrophilic CNT nanocomposites based on the combined mass was about 120 F/g (RuO2: 13 wt % loading), and the specific capacitance based on the mass of RuO2 was about 900 F/g.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume150
Issue number7
DOIs
Publication statusPublished - 2003 Jul 1

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Carbon Nanotubes
Carbon nanotubes
Nanocomposites
Capacitance
Electrodes
Hydrophilicity
Nanoparticles
Multiwalled carbon nanotubes (MWCN)
Electrolytes
Cyclic voltammetry
Electrostatics
Supercapacitor
Ions

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

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abstract = "Electrochemical characteristics of electrodes for supercapacitors built from RuO2/multiwalled carbon nanotube (CNT) nanocomposites have been investigated. Capacitances have been estimated by cyclic voltammetry at different scan rates from 5-50 mV/s. Electrostatic charge storage as well as pseudofaradaic reactions of RuO2 nanoparticles have been affected by the surface functionality of CNTs due to the increased hydrophilicity. Such hydrophilicity enables easy access of the solvated ions to the electrode/electrolyte interface, which increases faradaic reaction site number of RuO2 nanoparticles. The specific capacitance of RuO2/pristine CNT nanocomposites based on the combined mass was about 70 F/g (RuO2: 13 wt {\%} loading), and the specific capacitance based on the mass of RuO2 was 500 F/g. However, the specific capacitance of RuO2/hydrophilic CNT nanocomposites based on the combined mass was about 120 F/g (RuO2: 13 wt {\%} loading), and the specific capacitance based on the mass of RuO2 was about 900 F/g.",
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Carbon nanotube/RuO2 nanocomposite electrodes for supercapacitors. / Park, Jong Hyeok; Ko, Jang Myoun; Park, O. Ok.

In: Journal of the Electrochemical Society, Vol. 150, No. 7, 01.07.2003.

Research output: Contribution to journalArticle

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AB - Electrochemical characteristics of electrodes for supercapacitors built from RuO2/multiwalled carbon nanotube (CNT) nanocomposites have been investigated. Capacitances have been estimated by cyclic voltammetry at different scan rates from 5-50 mV/s. Electrostatic charge storage as well as pseudofaradaic reactions of RuO2 nanoparticles have been affected by the surface functionality of CNTs due to the increased hydrophilicity. Such hydrophilicity enables easy access of the solvated ions to the electrode/electrolyte interface, which increases faradaic reaction site number of RuO2 nanoparticles. The specific capacitance of RuO2/pristine CNT nanocomposites based on the combined mass was about 70 F/g (RuO2: 13 wt % loading), and the specific capacitance based on the mass of RuO2 was 500 F/g. However, the specific capacitance of RuO2/hydrophilic CNT nanocomposites based on the combined mass was about 120 F/g (RuO2: 13 wt % loading), and the specific capacitance based on the mass of RuO2 was about 900 F/g.

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