Oxygen transport in epitaxial La0.875Sr0.125CoO3-d thin-film cathodes for solid oxide fuel cells: Roles of anisotropic strain
- Oxygen transport in epitaxial La0.875Sr0.125CoO3-d thin-film cathodes for solid oxide fuel cells: Roles of anisotropic strain
- 조수영; 정용재; 안기용; 이종호; 김병국; 김형철
- oxygen transport; LSC perovskites; solid-state ionics; anisotropic strain; SOFC cathode
- Issue Date
- Scripta materialia
- VOL 115, 141-144
- We use first-principles calculation to investigate the influence of lattice strain on the oxygen vacancy and the migration energies in La1-xSrCoO3-δ via a realistic approach using the Poisson's ratio. In the calculation of the vacancy formation energy, itwas found that the oxygen sites in the major axis are favorable for achieving vacancy under tensile conditions, while those in the minor axis are in favor of vacancy formation under compressive conditions. The migration energy calculations for oxygen vacancy are also carried out and this reveals interesting strain dependence, higher activation energy when compressive strain is applied in the lateral direction
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