Oxygen transport in epitaxial La0.875Sr0.125CoO3-d thin-film cathodes for solid oxide fuel cells: Roles of anisotropic strain

Title
Oxygen transport in epitaxial La0.875Sr0.125CoO3-d thin-film cathodes for solid oxide fuel cells: Roles of anisotropic strain
Authors
조수영정용재안기용이종호김병국김형철
Keywords
oxygen transport; LSC perovskites; solid-state ionics; anisotropic strain; SOFC cathode
Issue Date
2016-04
Publisher
Scripta materialia
Citation
VOL 115, 141-144
Abstract
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
URI
http://pubs.kist.re.kr/handle/201004/58515
ISSN
13596462
Appears in Collections:
KIST Publication > Article
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