Abstract
Solid oxide electrolytes showing proton transport are extensively studied materials, which can be utilised in different types of highly efficient energy systems such as solid oxide fuel cells, solid oxide electrolysis cells, membrane converters and sensors. Here we present the results of a study of the functional properties of LaYO3-based materials, which exhibit higher chemical stability than the more well known proton-conducting electrolytes, cerates and zirconates of alkaline earth elements. The structural, ceramic, thermal and electrical properties of La0.9Sr0.1YO3–δ have been thoroughly studied depending on the partial Y substitution with some lanthanides (10 mol.% of Yb, Dy, Ho). According to the experimental data, La0.9Sr0.1Y0.9Yb0.1O3−δ can be considered a promising alternative to the basic oxide because of its better transport properties and the fact that there are no detrimental changes in other functional characteristics.
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