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

doi:10.1149/1.3570177

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 proceeding › Conference 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 language	English
Title of host publication	Solid Oxide Fuel Cells 12, SOFC XII
Pages	1881-1890
Number of pages	10
Edition	3 PART 3
DOIs	https://doi.org/10.1149/1.3570177
Publication status	Published - 2011 Dec 1
Event	12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting - Montreal, QC, Canada Duration: 2011 May 1 → 2011 May 6

Publication series

Name	ECS Transactions
Number	3 PART 3
Volume	35
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
Country	Canada
City	Montreal, QC
Period	11/5/1 → 11/5/6

ASJC Scopus subject areas

Engineering(all)

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

Solid Oxide Fuel Cells 12, SOFC XII. 3 PART 3. ed. 2011. p. 1881-1890 (ECS Transactions; Vol. 35, No. 3 PART 3).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kuhn, M, Fukuda, Y, Hashimoto, S, Sato, K , Yashiro, K & Mizusaki, J 2011, 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. in Solid Oxide Fuel Cells 12, SOFC XII. 3 PART 3 edn, ECS Transactions, no. 3 PART 3, vol. 35, pp. 1881-1890, 12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting, Montreal, QC, Canada, 11/5/1. https://doi.org/10.1149/1.3570177

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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.",

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AB - 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.

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