Oxygen nonstoichiometry of perovskite-type La 0.6Sr 0.4Co 1-yFe yO 3-δ (y=0.2, 0.4, 0.5, 0.6, 0.8, 1) SOFC cathode materials

M. Kuhn, Y. Fukuda, S. Hashimoto, K. Sato, K. Yashiro, J. Mizusaki

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

8 Citations (Scopus)

Abstract

The oxygen nonstoichiometry of La 0.6Sr 0.4Co 1-yFe yO 3-δ (LSCF) mixed-conducting perovskite-oxides can be classified into two groups: the cobalt-rich compounds (y=0, 0.2, 0.4) were previously reported to show a sharp decrease in oxygen content with reducing atmosphere, while the oxygen vacancy concentration increased more smoothly for the iron-rich compounds (y=0.6, 0.8, 1). Here we measured the oxygen content of LSCF with y=0.5 by thermogravimetry and coulometric titration as a function of oxygen partial pressure and temperature. No transitional behavior could be observed for La 0.6Sr 0.4Co 0.5Fe 0.5O 3-δ, the oxygen nonstoichiometry showed the same behavior as for the cobalt-rich compounds. Except for y=1, the thermochemical stability of LSCF was little affected by the iron dopant content; all compounds (y=0-0.8) decomposed at similar oxygen partial pressures.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 12, SOFC XII
Pages1881-1890
Number of pages10
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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