Material stability and cation transport of La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ, in SOFC cathodic conditions

M. Oh, A. Unemoto, K. Amezawa, T. Kawada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Material stability and cation transport of La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ were investigated by long-term annealing of the sintered pellets with and without applying oxygen potential gradients. The heat treatments at 1073 - 1273 K under uniform p(O 2) of 1.0 × 10 -4 - 0.21 bar for one week did not make any notable changes on the pellets. However, significant changes were observed when the pellets were placed under oxygen potential gradient between 1.0 bar oxygen and diluted oxygen (1.0 × 10 -4 - 1.0 × 10 -1 bar of p(O 2)). On the high p(O 2) side, many particles of cobalt and strontium oxide were found on the surface at 1273 K. The amount of the deposited particles increased with decreasing oxygen potential on the opposite side and/or increasing temperature. The results indicated that the cobalt and strontium ions are faster than the other cations and the cobalt ions are fastest among the cations involved in the LSCF.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 12, SOFC XII
Pages2249-2253
Number of pages5
Edition3 PART 3
DOIs
Publication statusPublished - 2011 Dec 1
Event12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting - Montreal, QC, Canada
Duration: 2011 May 12011 May 6

Publication series

NameECS Transactions
Number3 PART 3
Volume35
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
CountryCanada
CityMontreal, QC
Period11/5/111/5/6

ASJC Scopus subject areas

  • Engineering(all)

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