Electrical properties of the LaLiyCo1 – yO3 – δ (0 ≤ y ≤ 0.10) oxides

The effect of the Li ion concentration on the phase composition, the electrical conductivity, and the thermoelectric power of the LaLi y Co 1– y O 3–δ (0 ≤ y ≤ 0.1) oxides synthesized by cocrystallization has been studied. It is found that the region of the perovskite-like solid solution LaLi y Co 1...

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Bibliographic Details
Published in:Russian metallurgy Metally 2017-08, Vol.2017 (8), p.664-669
Main Authors: Vecherskii, S. I., Konopel’ko, M. A., Batalov, N. N., Antonov, B. D., Reznitskikh, O. G., Yaroslavtseva, T. V.
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Materials Science
Metallic Materials
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Summary:The effect of the Li ion concentration on the phase composition, the electrical conductivity, and the thermoelectric power of the LaLi y Co 1– y O 3–δ (0 ≤ y ≤ 0.1) oxides synthesized by cocrystallization has been studied. It is found that the region of the perovskite-like solid solution LaLi y Co 1– y O 3–δ is no higher than y = 0.037. In the temperature range 300–1020 K, lithium alloying leads to an increase in the electrical conductivity and a decrease in the positive thermoelectric power of the single-phase samples compared to LaCoO 3–δ . The results are discussed using the density of states model proposed by Senarus Rodriguez and Goodenough for LaCoO 3–δ and La 1– x Sr x CoO 3–δ and using the Mott theory of noncrystalline substances.
ISSN:0036-0295
1555-6255
DOI:10.1134/S0036029517080110