Prevention of SOFC cathode degradation in contact with Cr-containing alloy

K. Fujita, K. Ogasawara, Y. Matsuzaki, T. Sakurai

Research output: Contribution to journalConference articlepeer-review

94 Citations (Scopus)

Abstract

The effects of coating materials on Cr-containing alloy separators were examined for preventing the degradation of solid oxide fuel cell (SOFC) performance. Various oxide materials (YSZ, Y2O3, La 2O3, LaAlO3 and (La,Sr)CoO3, LSCO) were coated on the alloys, and investigated for the degree of Cr-poisoning using a half-cell measurement method. In these oxides, (La,Sr)CoO3 coating was found to be effective for preventing the degradation. The LSCO-coated alloy was analyzed by X-ray diffractometry (XRD), scanning electron microscope (SEM) and energy dispersion X-ray (EDX) analysis. The interface between the cathode and the electrolyte was examined by electron probe micro analysis. Consequently, it was proved that a LSCO coating controls the growth of the Cr 2O3 oxide layer on the Cr-containing alloy surface. And the effects of LSCO coating were further confirmed by a single-cell stack test.

Original languageEnglish
Pages (from-to)261-269
Number of pages9
JournalJournal of Power Sources
Volume131
Issue number1-2
DOIs
Publication statusPublished - May 14 2004
Externally publishedYes
EventSelected Papers Presented at the Eigth Grove Fuel Cell Symposium - London, United Kingdom
Duration: Sep 24 2003Sep 26 2003

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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