Electrolyte materials for solid oxide fuel cells derived from metal complexes: Gadolinia-doped ceria

Chatchai Veranitisagul, Attaphon Kaewvilai, Worawat Wattanathana, Nattamon Koonsaeng, Enrico Traversa, Apirat Laobuthee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Gadolinia doped ceria (GDC) powders with different gadolinium contents were successfully prepared by the thermal decomposition of ceria complexes. All the calcined powder samples were found to be ceria-based solid-solutions having a fluorite-type structure. The powders were cold-isostatically pressed and sintered in air at 1500°C for 5 h to attain a sintered density of about 90% of its theoretical value. The electrical conductivity of the GDC pellets in air was studied as a function of temperature in the 225-700°C range, by using two-probe electrochemical impedance spectroscopy measurements. The highest total conductivity (σ 600°C = 0.025 S/cm) was found for the Ce 0.85Gd 0.15O 1.925 composition.

Original languageEnglish (US)
Pages (from-to)2403-2409
Number of pages7
JournalCeramics International
Volume38
Issue number3
DOIs
StatePublished - Apr 1 2012

Keywords

  • A. Powders: chemical preparation
  • C. Ionic conductivity
  • D. CeO
  • E. Fuel cells

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

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