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Electrotransport properties of SOFC cathode materials based on lanthanum cuprate doped with praseodymium and strontium oxides

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Abstract

A complex study of thermal, conducting, and electrocatalytic properties of cuprates La1.8‒x Pr x Sr0.2CuO4–δ (х = 0.2; 0.4) with the K2NiF4 structure is carried out in order to assess their prospects as the cathode materials for solid-oxide fuel cells. The thermal analysis reveals stability of samples heated up to 950°С in air. The conductivity of cuprates measured in the temperature range of 100–900°С and the partial oxygen pressure from 10–3 to 1 atm is of the metallic nature and varies from 70 to 40 S/cm in the temperature interval of 500–900°С in air. The studies of chemical stability of cuprates with respect to solid electrolytes demonstrate the absence of their chemical interaction with Ce0.9Gd0.1O1.95 (GDC) at 900°С and with La0.8Sr0.2Ga0.85Mg0.15O3–δ (LSGM) at 1000°C after 25 h annealing. For La1.6Pr0.2Sr0.2CuO4–δ electrodes deposited on the surface of GDC or LSGM solid electrolytes, the studies of electrocatalytic activity in the oxygen reduction reaction demonstrate that the smallest polarization resistance is typical of electrodes deposited on the GDC surface.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow Oblast’, 142432, Russia

    N. V. Lyskov

  2. Moscow State University, Vorob’evy Gory, GSP-2, Moscow, 119992, Russia

    L. M. Kolchina, P. P. Pestrikov, G. N. Mazo & E. V. Antipov

Authors
  1. N. V. Lyskov
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  2. L. M. Kolchina
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  3. P. P. Pestrikov
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  4. G. N. Mazo
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  5. E. V. Antipov
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Correspondence to N. V. Lyskov.

Additional information

Original Russian Text © N.V. Lyskov, L.M. Kolchina, P.P. Pestrikov, G.N. Mazo, E.V. Antipov, 2016, published in Elektrokhimiya, 2016, Vol. 52, No. 7, pp. 718–724.

Published on the basis of the materials of III All-Russia Conference “Fuel Cells and Power Plants on Their Basis,” Chernogolovka, 2015.

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Lyskov, N.V., Kolchina, L.M., Pestrikov, P.P. et al. Electrotransport properties of SOFC cathode materials based on lanthanum cuprate doped with praseodymium and strontium oxides. Russ J Electrochem 52, 642–647 (2016). https://doi.org/10.1134/S1023193516070120

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  • DOI: https://doi.org/10.1134/S1023193516070120

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