Oxygen exchange kinetics on a highly oriented La{sub 0.5}Sr{sub 0.5}CoO
Oxygen exchange at a highly oriented La{sub 0.5}Sr{sub 0.5}CoO{sub 3-{delta}} thin film prepared on (100) surfaces of an yttria-stabilized zirconia single crystal by pulsed-laser deposition was studied with ac impedance spectroscopy under various temperatures and oxygen partial pressures. Three distinctive features observed in the impedance spectra were assigned to contributions from the ionic conduction of the electrolyte, oxide ion transfer across the electrode/electrolyte interface, and the oxygen exchange on the film surface. An equivalent circuit model was proposed to analyze the impedance results, from which the surface chemical exchange coefficients, k{sub chem}, were derived as a function of temperature and oxygen partial pressure. {copyright} 2001 American Institute of Physics.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40230701
- Journal Information:
- Applied Physics Letters, Vol. 79, Issue 6; Other Information: DOI: 10.1063/1.1390316; Othernumber: APPLAB000079000006000776000001; 035131APL; PBD: 6 Aug 2001; ISSN 0003-6951
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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