Perovskite cathodes for solid oxide fuel cells based on ceria electrolytes

M. Gödickemeier, K. Sasaki, L. J. Gauckler, I. Riess

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97 Citations (Scopus)

Abstract

The ionic current-overpotential characteristics of cathodes on ceria-based electrolytes have been evaluated by galvanostatic current-interruption measurements under fuel cell operating conditions. The effect of either mixed ionic electronic conductivity or high oxygen diffusivity on the oxygen reduction kinetics was investigated. La0.8Sr0.2MnO3 served as a model substance for cathodes with a high activity for oxygen reduction and a low oxygen ionic conductivity. The behaviour of La0.8Sr0.2MnO3 is compared to that of La0.84Sr0.16CoO3 which shows high activity for oxygen reduction and high oxygen diffusivity.

Original languageEnglish
Pages (from-to)691-701
Number of pages11
JournalSolid State Ionics
Volume86-88
Issue numberPART 2
DOIs
Publication statusPublished - Jul 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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