Electrochemical properties of mixed conducting perovskites La1-xMxCo1-yFeyO3-δ (M = Sr, Ba, Ca)

J. W. Stevenson, T. R. Armstrong, R. D. Carneim, L. R. Pederson, W. J. Weber

Research output: Contribution to journalArticle

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Abstract

Perovskite compositions in the system La1-xMxCO1-yFeyO3-δ (M = Sr, Ba, Ca) exhibited high electronic and ionic conductivity. Substantial reversible weight loss was observed at elevated temperatures as the materials became increasingly oxygen deficient. This loss of lattice oxygen at high temperatures, which tended to increase with increasing acceptor content, resulted in a decrease in the electronic conductivity. In an oxygen partial pressure gradient, oxygen flux through dense sintered membranes of these materials was highly dependent on composition and increased with increasing temperature. The increase in oxygen flux with increasing temperature was attributed to increases in the mobility and concentration of lattice oxygen vacancies. The calculated ionic conductivities of some compositions exceeded that of yttria-stabilized zirconia.

Original languageEnglish
Pages (from-to)2722-2729
Number of pages8
JournalJournal of the Electrochemical Society
Volume143
Issue number9
Publication statusPublished - Sep 1996
Externally publishedYes

Fingerprint

perovskites
Electrochemical properties
Oxygen
conduction
oxygen
Ionic conductivity
ion currents
Chemical analysis
Fluxes
Temperature
Yttria stabilized zirconia
Oxygen vacancies
conductivity
Pressure gradient
Partial pressure
Perovskite
yttria-stabilized zirconia
pressure gradients
electronics
partial pressure

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Stevenson, J. W., Armstrong, T. R., Carneim, R. D., Pederson, L. R., & Weber, W. J. (1996). Electrochemical properties of mixed conducting perovskites La1-xMxCo1-yFeyO3-δ (M = Sr, Ba, Ca). Journal of the Electrochemical Society, 143(9), 2722-2729.

Electrochemical properties of mixed conducting perovskites La1-xMxCo1-yFeyO3-δ (M = Sr, Ba, Ca). / Stevenson, J. W.; Armstrong, T. R.; Carneim, R. D.; Pederson, L. R.; Weber, W. J.

In: Journal of the Electrochemical Society, Vol. 143, No. 9, 09.1996, p. 2722-2729.

Research output: Contribution to journalArticle

Stevenson, JW, Armstrong, TR, Carneim, RD, Pederson, LR & Weber, WJ 1996, 'Electrochemical properties of mixed conducting perovskites La1-xMxCo1-yFeyO3-δ (M = Sr, Ba, Ca)', Journal of the Electrochemical Society, vol. 143, no. 9, pp. 2722-2729.
Stevenson JW, Armstrong TR, Carneim RD, Pederson LR, Weber WJ. Electrochemical properties of mixed conducting perovskites La1-xMxCo1-yFeyO3-δ (M = Sr, Ba, Ca). Journal of the Electrochemical Society. 1996 Sep;143(9):2722-2729.
Stevenson, J. W. ; Armstrong, T. R. ; Carneim, R. D. ; Pederson, L. R. ; Weber, W. J. / Electrochemical properties of mixed conducting perovskites La1-xMxCo1-yFeyO3-δ (M = Sr, Ba, Ca). In: Journal of the Electrochemical Society. 1996 ; Vol. 143, No. 9. pp. 2722-2729.
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