Characterization of hydrous ruthenium oxide/carbon nanocomposite supercapacitors prepared by a colloidal method

Hansung Kim, Branko N. Popov

Research output: Contribution to journalArticle

241 Citations (Scopus)

Abstract

Amorphous nanostructured composite materials with different RuO2 loadings on carbon were prepared by colloidal method. The annealing temperature was found to be critical in optimizing the electrochemical performance of this material. FT Raman study confirmed that ruthenium complex converted to ruthenium oxide after annealing at 100°C. The specific capacitance of RuO2/carbon composite electrode (40wt.% Ru) was calculated by using cyclic voltammetry, which was to be 407F/g. The specific capacitance of RuO2·xH2O was estimated to be approximately 863F/g by subtracting the contribution of double layer capacitance resulting from carbon in the composite. Transmission electron microscopy indicated that the particle size of RuO2·xH2O on carbon was approximately 3nm. By increasing the Ru loading over 60wt.%, the particle size of RuO2 increased up to several micrometers resulting in a decrease of the utilization of RuO2, the specific surface area and the rate capability.

Original languageEnglish
Pages (from-to)52-61
Number of pages10
JournalJournal of Power Sources
Volume104
Issue number1
DOIs
Publication statusPublished - 2002 Jan 15

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Ruthenium
electrochemical capacitors
Oxides
ruthenium
Nanocomposites
nanocomposites
Carbon
Capacitance
oxides
carbon
capacitance
composite materials
Composite materials
Particle size
Annealing
annealing
Nanostructured materials
Specific surface area
Cyclic voltammetry
micrometers

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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abstract = "Amorphous nanostructured composite materials with different RuO2 loadings on carbon were prepared by colloidal method. The annealing temperature was found to be critical in optimizing the electrochemical performance of this material. FT Raman study confirmed that ruthenium complex converted to ruthenium oxide after annealing at 100°C. The specific capacitance of RuO2/carbon composite electrode (40wt.{\%} Ru) was calculated by using cyclic voltammetry, which was to be 407F/g. The specific capacitance of RuO2·xH2O was estimated to be approximately 863F/g by subtracting the contribution of double layer capacitance resulting from carbon in the composite. Transmission electron microscopy indicated that the particle size of RuO2·xH2O on carbon was approximately 3nm. By increasing the Ru loading over 60wt.{\%}, the particle size of RuO2 increased up to several micrometers resulting in a decrease of the utilization of RuO2, the specific surface area and the rate capability.",
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Characterization of hydrous ruthenium oxide/carbon nanocomposite supercapacitors prepared by a colloidal method. / Kim, Hansung; Popov, Branko N.

In: Journal of Power Sources, Vol. 104, No. 1, 15.01.2002, p. 52-61.

Research output: Contribution to journalArticle

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