Three-Layered Membranes for Planar Solid Oxide Fuel Cells of the Electrolyte-Supported Design: Characteristics and Applications

Three-layered ceramic membranes based on stabilized zirconia for planar solid-oxide fuel cell (SOFC) are prepared by the tape casting method. The outer layers containing 94 mol % ZrO 2 –6 mol % Sc 2 O 3 provide the enhanced mechanical stability; the inner layer has the composition of 89 mol % ZrO 2...

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Bibliographic Details
Published in:Russian journal of electrochemistry 2020-02, Vol.56 (2), p.132-138
Main Authors: Agarkova, E. A., Agarkov, D. A., Burmistrov, I. N., Zadorozhnaya, O. Yu, Yalovenko, D. V., Nepochatov, Yu. K., Bredikhin, S. I.
Format: Article
Language:English
Subjects:
Bend strength
Chemistry
Chemistry and Materials Science
Electrochemical analysis
Electrochemistry
Electrolytic cells
Frequency ranges
Fuel cells
Mechanical properties
Membranes
Physical Chemistry
Scandium oxides
Solid oxide fuel cells
Solid solutions
Tape casting
Ultimate tensile strength
Yttrium oxide
Zirconium dioxide
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Summary:Three-layered ceramic membranes based on stabilized zirconia for planar solid-oxide fuel cell (SOFC) are prepared by the tape casting method. The outer layers containing 94 mol % ZrO 2 –6 mol % Sc 2 O 3 provide the enhanced mechanical stability; the inner layer has the composition of 89 mol % ZrO 2 –10 mol % Sc 2 O 3 –1 mol % Y 2 O 3 which has the highest anionic conductivity in the series of solid solutions ZrO 2 –Y 2 O 3 –Sc 2 O 3 . Studying the mechanical characteristics shows that the ultimate strength (bending strength) of these membranes much exceeds the value typical of single-layered samples. The anionic conductivity of three-layered ceramics is studied by the impedance spectroscopy in the frequency range from 1Hz to 1 MHz. Membrane-electrode assemblies for SOFCs are fabricated and their electrochemical properties are studied under the conditions of fuel cell operation.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193520020020