Abstract
High-temperature proton-conducting oxide materials are of great fundamental interest due to the phenomenon of proton conductivity which appears with oxygen-ionic conductivity in a humidified atmosphere and is strongly dependent on temperature. The practical interest associated with the use of such Co-ionic electrolyte materials in solid oxide fuel cells (SOFCs) derives from the increased efficiency as a result of the higher open circuit voltage and, correspondingly, power output characteristics in comparison with those of SOFCs based on unipolar oxygen-ion conducting electrolytes. Today there is much work directed toward enhancing an SOFC’s electrochemical characteristics by develo** new cathode materials that have excellent electrocatalytic activity. Thermal affinity between electrolyte and cathode materials should also be considered in order to attain both long-term stability and cycling. In this work the analysis of structural, electrical, and thermal properties of simple and layered cobaltites (GdBaCo2O5 + δ, NdBaCo2O5 + δ, Ba0.5Sr0.5CoO3–δ, Y0.8Ca0.2BaCo4O7 + δ), cobaltite-ferrites (NdBa0.5Sr0.5Co1.5Fe0.5O5 + δ, GdBaCoFeO5 + δ, Ba0.5Sr0.5Co0.8Fe0.2O3–δ, Ba0.5Sr0.5Co0.2Fe0.8O3–δ, La0.6Sr0.4Co0.2Fe0.8O3), nikelites (La2NiO4 + δ and its alkali earth element substituted derivatives) and nikelate (LaNi0.6Fe0.4O3–δ) was investigated in terms of their perspective applications in intermediate-temperature SOFCs based on proton-conducting electrolytes.
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Acknowledgments
This work is supported by the Russian Foundation for Basic Research (grant № 13-03-00065); Program of UD RAS (project № 15-20-3-15), by Act 211 Government of the Russian Federation (contract № 02.A03.21.0006); and the Council of the President of the Russian Federation (grant № СП-1885.2015.1).
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Medvedev, D.A., Pikalova, E.Y. (2018). Development of the Cathode Materials for Intermediate-Temperature SOFCs Based on Proton-Conducting Electrolytes. In: Syngellakis, S., Brebbia, C. (eds) Challenges and Solutions in the Russian Energy Sector. Innovation and Discovery in Russian Science and Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-75702-5_20
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