Oxygen exchange kinetics on a highly oriented La0.5Sr0.5CoO3-δ thin film prepared by pulsed-laser deposition

Yuemei L. Yang, A. J. Jacobson, C. L. Chen, G. P. Luo, K. D. Ross, C. W. Chu

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84 引文 斯高帕斯(Scopus)

摘要

Oxygen exchange at a highly oriented La0.5Sr0.5CoO3-δ 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, kchem, were derived as a function of temperature and oxygen partial pressure.

原文English
頁(從 - 到)776-778
頁數3
期刊Applied Physics Letters
79
發行號6
DOIs
出版狀態Published - 2001 8月 6

All Science Journal Classification (ASJC) codes

  • 物理與天文學(雜項)

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