Abstract
The bilayered supports for anode-supported solid oxide fuel cells (SOFCs) based on composites of NiO and ZrO2 stabilized by 10 mol % Sc2O3 and 1 mol % Y2O3 (10Sc1YSZ) are synthesized by tape casting. The required porosity is attained by optimization of the content of pore-forming agent (starch) in the initial suspension and also by thermal treatment, on retention of the high strength characteristics of the substrate. The mechanical strength of supports is assessed by three-point bending method. The bilayered gas-tight electrolyte with the layers of ZrO2 stabilized by Y2O3 (8 mol %) (8YSZ) and Ce0.9Gd0.1O1.95 is obtained by magnetron sputtering followed by annealing at 1200°С. Studying the electrochemical characteristics of a SOFC with the La0.6Sr0.4CoO3 − δ cathode has shown that as the working temperature decreases, the contribution of electrode processes into cell’s internal resistance increases which induces the specific power decrease down to 1.8, 1.4, and 0.9 W/cm2 at 850, 800, and 750°С, respectively.
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Funding
This study was supported by the Ministry of Science and Higher Education of the Russian Federation, grant no. 05.608.21.0279 (electronic budget no. 075-15-2019-1714, unique identifier RFMEFI60819X0279).
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Translated by T. Safonova
Published based on the materials of the VII All-Russian Conference with International Participation “Fuel Cells and Power Plants Based on Them,” Chernogolovka, 2020.
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Agarkova, E.A., Zadorozhnaya, O.Y., Burmistrov, I.N. et al. Tape Casting of Bilayered Anode Supports and Electrochemical Performance of SOFCs Based on Them. Russ J Electrochem 58, 114–121 (2022). https://doi.org/10.1134/S1023193522020033
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DOI: https://doi.org/10.1134/S1023193522020033