Ca3-xLaxCo4O9+δ (x=0, 0.3): New cobaltite materials as cathodes for proton conducting solid oxide fuel cell

Hamdi Ben Yahia, Fabrice Mauvy, Jean Claude Grenier

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Misfit-type Ca3-xLaxCo4O9+δ (x=0, 0.3) oxides were synthesised to be evaluated as possible cathode materials for proton conducting fuel cells (PCFCs) based on BaCe0.9Y0.1O3-δ (BCY10) dense ceramic electrolyte. The electrical conductivity value of Ca2.7La0.3Co4O9+δ (σ≈53 S cm-1 at 600 °C) is in the range of usually required value for a cathode application (about 50-100 S cm-1). In order to test the performance of each compound as cathode material, impedance measurements were carried out on Ca3-xLaxCo4O9+δ/BaCe0.9Y0.1O3-δ/Ca3-xLaxCo4O9+δ symmetrical half cells over the temperature range 400-800 °C under wet air. A promising electrocatalytic activity has been observed with both compounds Ca3Co4O9+δ and Ca2.7La0.3Co4O9+δ. Factually, the area specific resistance obtained was about 2.2 Ω cm2 at 600 °C.

Original languageEnglish
Pages (from-to)527-531
Number of pages5
JournalJournal of Solid State Chemistry
Volume183
Issue number3
DOIs
Publication statusPublished - Mar 2010

    Fingerprint

Keywords

  • Cathode
  • Layered cobaltite oxide
  • PCFC
  • Proton conductor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this