Ca3-xLaxCo4O9+δ (x=0, 0.3)

New cobaltite materials as cathodes for proton conducting solid oxide fuel cell

Hamdi 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
Externally publishedYes

Fingerprint

solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Protons
Cathodes
cathodes
conduction
protons
impedance measurement
Oxides
Electrolytes
fuel cells
Fuel cells
electrolytes
ceramics
electrical resistivity
oxides
air
Air
cells
cobaltite

Keywords

  • Cathode
  • Layered cobaltite oxide
  • PCFC
  • Proton conductor
  • Y-doped BaCeO

ASJC Scopus subject areas

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

Cite this

Ca3-xLaxCo4O9+δ (x=0, 0.3) : New cobaltite materials as cathodes for proton conducting solid oxide fuel cell. / Yahia, Hamdi; Mauvy, Fabrice; Grenier, Jean Claude.

In: Journal of Solid State Chemistry, Vol. 183, No. 3, 03.2010, p. 527-531.

Research output: Contribution to journalArticle

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