LaCoO3 – δ as the Material of an Oxygen Electrode for a Molten Carbonate Fuel Cell: I. Electrophysical Properties of Lithiated LaCoO3 – δ
- Authors: Vecherskii S.I.1, Konopel’ko M.A.1, Antonov B.D.1, Batalov N.N.1, Zvezdkin M.A.1, Zvezdkina I.V.1
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Affiliations:
- Institute of High-Temperature Electrochemistry, Ural Branch
- Issue: Vol 2018, No 2 (2018)
- Pages: 149-154
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/172269
- DOI: https://doi.org/10.1134/S0036029518020209
- ID: 172269
Cite item
Abstract
Oxides LaCoO3 – δ + (z/2) Li2O (0 ≤ z ≤ 0.15) are synthesized to determine the boundaries of changing the electrophysical properties of LaCoO3 – δ due to its in situ lithiation in the (Li0.62K0.38)2CO3 eutectic melt. A perovskite-like solid solution (La1 – xLix)(LixCo1 – x)O3 – δ, where x = z/(z + 2), is found to form as a result of Li doping. The region of existence of the solution does not exceed 2x = 0.072. At a higher concentration of Li, LiCoO2 forms along with the perovskite-like phase. At the operating temperature of the carbonate fuel cell (T = 920 K), the single-phase samples have metallic conduction and positive thermopower. The electrical conductivity of the Li-doped samples decreases as compared to that of LaCoO3 – δ by no more than 1.5 times and varies from 3.2 × 104 to 3.8 × 104 S/m.
About the authors
S. I. Vecherskii
Institute of High-Temperature Electrochemistry, Ural Branch
Email: m.konopelko@inbox.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137
M. A. Konopel’ko
Institute of High-Temperature Electrochemistry, Ural Branch
Author for correspondence.
Email: m.konopelko@inbox.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137
B. D. Antonov
Institute of High-Temperature Electrochemistry, Ural Branch
Email: m.konopelko@inbox.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137
N. N. Batalov
Institute of High-Temperature Electrochemistry, Ural Branch
Email: m.konopelko@inbox.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137
M. A. Zvezdkin
Institute of High-Temperature Electrochemistry, Ural Branch
Email: m.konopelko@inbox.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137
I. V. Zvezdkina
Institute of High-Temperature Electrochemistry, Ural Branch
Email: m.konopelko@inbox.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137
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