Investigation of thermal, electrical, and electrochemical properties of Pr1−xSrxFe1−yCoyO3 (0 < x < 0.4; y = 0.2, 0.5) cathode materials for SOFC


Nikonov A.V. Pavzderin N.B. Khrustov V.R. Semenova I.V. Demidova K.I. Kuterbekov K.A. Bekmyrza K.Z. Nurakov S.N. Koketay T.A. Gyrdasova O.I.
5 June 2021Elsevier Ltd

Journal of Alloys and Compounds
2021#865

The new cathode materials Pr1−xSrxFe1−yCoyO3 (0 ≤ x ≤ 0.4; y = 0.2, 0.5) for SOFC have been studied. The materials were synthesized by the self-propagating high-temperature synthesis method. It was shown that the chemical activity of Pr1−xSrxFe1−yCoyO3 (PSFC) with respect to Zr0.84Y0.16O2−δ (YSZ) electrolyte increases with increasing concentration of Sr and Co, whereas the interaction with Ce0.73Gd0.27O2−δ (GDC) electrolyte was not found. The thermal expansion of praseodymium ferro-cobaltite nonlinearly depends on the Sr content with a minimum at x = 0.3. The conductivity of the investigated materials increases with an increase of Sr and Co content. The cathode materials in contact with YSZ have a high polarization resistance (a few Ω cm2 at 850 °C) due to their chemical interaction. Replacement of YSZ electrolyte with GDC results in the reduction of the polarization resistance by an order of magnitude. The Pr0.6Sr0.4Fe0.8Co0.2O3 in contact with GDC has the lowest polarization resistance of 0.05 Ω cm2 at 850 °С.

Cathode , Conductivity , CTE , Polarization resistance , Strontium-doped praseodymium cobalt ferrites (PSCF)

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Institute of Electrophysics, Ural Branch of RAS, 106 Amundsena St, Yekaterinburg, 620216, Russian Federation
L.N. Gumilyov Eurasian National University, 2 Satpaeva St, Nur-Sultan, 010008, Kazakhstan
Institute of Solid-State Chemistry, Ural Branch of RAS, 91 Pervomaiskaya, Yekaterinburg, 620990, Russian Federation

Institute of Electrophysics
L.N. Gumilyov Eurasian National University
Institute of Solid-State Chemistry

10 лет помогаем публиковать статьи Международный издатель

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