Effect of Pt nanostructures on the electrochemical properties of Co3O4 electrodes for micro-electrochemical capacitors

Hyo Jin Ahn, Tae Yeon Seong

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17 Citations (Scopus)

Abstract

We report on the formation and electrochemical properties of Co3O4/Pt nanocomposite electrodes, which were fabricated by an RF magnetron co-sputtering system, for micro-electrochemical capacitors. High-resolution electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy examinations are performed to characterize the structural and chemical properties of the Co3O4/Pt nanocomposite electrodes. It is shown that the Co3O4/Pt6020 nanocomposite electrodes where RF powers of 60 and 20 W were applied to Co3O4 and Pt targets, respectively, give capacitance of 391.6 F/cm3 at 100 mV/s along with superb high-rate performance, which is much higher that those of Co3O4 only and other nanocomposite electrodes. The improvement is explained in terms of the formation of Co3O4-Pt combined nanostructures and their good electrical conductivity.

Original languageEnglish
JournalJournal of Alloys and Compounds
Volume478
Issue number1-2
DOIs
Publication statusPublished - 2009 Jun 10

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Keywords

  • Eelectrochemical reactions
  • Electrode materials
  • Nanostructured materials

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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