Electrochemical properties of a SOFC cathode in contact with a chromium-containing alloy separator

Yoshio Matsuzaki, Isamu Yasuda

Research output: Contribution to journalArticlepeer-review

193 Citations (Scopus)

Abstract

Substrate-type solid oxide fuel cells (SOFCs) can reduce the operating temperature of SOFCs to enable alloys to be used as separators. When chromium-forming alloys are used as the separators, however, the performance of SOFC cathodes degrades rapidly. The degradation of a porous La0.6Sr0.4MnO3+δ (LSM)/YSZ electrode in contact with the alloy current-collector has been investigated using the frequency dispersion diagram of the complex impedance of the electrode. The equivalent circuit analysis based on a Randles-type equivalent circuit made clear that the Cr2O3 deposition at the interface between the LSM and the YSZ electrolyte causes an increase in both diffusion and charge-transfer resistances.

Original languageEnglish
Pages (from-to)271-278
Number of pages8
JournalSolid State Ionics
Volume132
Issue number3
DOIs
Publication statusPublished - Jul 2 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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