Electrode and oxygen permeation properties of (Ce, Sm)O2-MFe2O4 composite thin films (M = Co and Mn)

Hitoshi Takamura, Yasuyuki Koshino, Atsunori Kamegawa, Masuo Okada

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28 Citations (Scopus)

Abstract

This paper describes the electrode and oxygen permeation properties of Sm-doped CeO2-MFe2O4 composites prepared on a Sm-doped CeO2 electrolyte, where M = Co and Mn. The porous and thin-film samples were prepared by means of citrate-based liquid-mix and chemical solution deposition techniques, respectively. For Cole-Cole plots of porous and thin-film electrodes, two semi-circles corresponding to interface and chemical impedances were observed. The thin-film electrode of 1-μm-thick (Ce0.9Sm0.1)O2-30 vol.%CoFe2O4 (30CFO) composites showed a current density of 509 mA/cm2 at 900 °C under a cathodic overpotential of 159 mV. The 30CFO thin film exhibited an oxygen flux density of 1.3 μmol/cm2 s at 900 °C under pO2 of 1.2 × 10- 20 atm.

Original languageEnglish
Pages (from-to)2185-2189
Number of pages5
JournalSolid State Ionics
Volume177
Issue number19-25 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Oct 15

Keywords

  • Cathode
  • Ceria
  • Composite
  • Mixed conductor
  • Oxygen permeable ceramics
  • Thin film

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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