Thermomechanical and Electrical Properties of Pr1 –xSrxFe0.8Co0.2O3 (x = 0.3 and 0.4) and Composites Based on Them


Nikonov A.V. Pavzderin N.B. Khrustov V.R. Semenova I.V. Kuterbekov K.A. Bekmyrza K.Z.
March 2021Pleiades journals

Inorganic Materials
2021#57Issue 3316 - 323 pp.

Abstract—: Pr1 –xSrxFe0.8Co0.2O3 (PSFC) (x = 0.3, 0.4) materials and composites based on them are thought to be promising cathode materials for solid oxide fuel cells. The PSFC powders with micron-sized particles were prepared by self-propagating high-temperature synthesis. Zr0.84Y0.16O2 – δ (YSZ) and Ce0.73Gd0.27O2 – δ (GDC) nanopowders were used as a second component of the composites. It was found that at 1000°C PSFC reacts with the YSZ electrolyte to form SrZrO3, whereas there is no chemical interaction with GDC even at 1200°C. The electrical conductivity of the PSFC with x = 0.4 has been shown to be more than twice that of the material with x = 0.3. Herewith the increase of the Sr concentration in the PSFC leads to an increase of its thermal expansion coefficient (TEC), which exceeds that of GDC. The formation of PSFC/GDC composites makes it possible to achieve a better match in thermal expansion and sintering kinetics between the cathode and electrolyte materials. However, the electrical conductivity of the studied composites is a factor of 2–5 lower than that of the initial PSFC materials.

composite solid oxide fuel cell cathode , electrical conductivity , interaction with yttria-stabilized zirconia and gadolinium-doped ceria , praseodymium strontium ferrite cobaltite , sintering , thermal expansion

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Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620016, Russian Federation
L.N. Gumilyov Eurasian National University, Nur-Sultan, 010008, Kazakhstan

Institute of Electrophysics
L.N. Gumilyov Eurasian National University

10 лет помогаем публиковать статьи Международный издатель

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