Study of oxygen transport of microtubular La0.5Sr0.5Fe1 – xNbxO3 – δ membranes

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Resumo

Perovskite-like oxides based on lanthanum-strontium ferrites are considered promising electrode materials for use in various types of fuel cells, and the strategy of modifying these materials by partial substitution of iron with highly charged ferroactive cations has proven to be an effective way to increase their chemical stability. In this paper, for the first time, the results of a study of the permeability of microtubular oxygen membranes based on La0.5Sr0.5Fe1 – xNbxO3 – δ oxide are presented. The activation energy of oxide bulk diffusion (20±4 kJ/mol) was found.

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Sobre autores

I. Kovalev

Institute of Solid State Chemistry and Mechanochemistry SB RAS

Autor responsável pela correspondência
Email: kovalev.ivan.vyacheslavovich@gmail.com
Rússia, Novosibirsk

R. Guskov

Institute of Solid State Chemistry and Mechanochemistry SB RAS

Email: kovalev.ivan.vyacheslavovich@gmail.com
Rússia, Novosibirsk

V. Sivtsev

Institute of Solid State Chemistry and Mechanochemistry SB RAS

Email: kovalev.ivan.vyacheslavovich@gmail.com
Rússia, Novosibirsk

M. Gongola

Institute of Solid State Chemistry and Mechanochemistry SB RAS; Novosibirsk State University

Email: kovalev.ivan.vyacheslavovich@gmail.com
Rússia, Novosibirsk; Novosibirsk

M. Popov

Institute of Solid State Chemistry and Mechanochemistry SB RAS

Email: kovalev.ivan.vyacheslavovich@gmail.com
Rússia, Novosibirsk

Bibliografia

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2. Fig. 1. Comparison of experimental and calculated diffraction patterns.

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3. Fig. Fig. 2. SEM membranes LSFN10 in cross section (a) and on the surface (b).

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4. Fig. 3. Results of energy dispersive analysis of the surface of the LSFN10 sample: (a) main phase, (b) secondary phase.

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5. Fig. Fig. 4. Dependence of the specific oxygen flow (JO2) on the supply gas pressure (p1) for membranes of composition LSFN10.

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6. Fig. Fig. 5. Arrhenius dependence of oxygen exchange for membranes of composition LSFN10.

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