Abstract
Results are presented of studying electrochemical properties of perovskite-like solid solutions (La0.5 + x Sr0.5 − x )1 − y Mn0.5Ti0.5O3 − δ (x = 0–0.25, y = 0–0.03) synthesized using the citrate technique and studied as oxide anodic materials for solid oxide fuel cells (SOFC). X-ray diffraction (XRD) analysis is used to establish that the materials are stable in a wide range of oxygen chemical potential, stable in the presence of 5 ppm H2S in the range of intermediate temperatures, and also chemically compatible with the solid electrolyte of La0.8Sr0.2Ga0.8Mg0.15Co0.05O3 − δ (LSGMC). It is shown that transition to a reducing atmosphere results in a decrease in electron conductivity that produced a significant effect on the electrochemical activity of porous electrodes. Model cells of planar SOFC on a supporting solid-electrolyte membrane (LSGMC) with anodes based on (La0.6Sr0.4)0.97Mn0.5Ti0.5O3 − δ and (La0.75Sr0.25)0.97Mn0.5Ti0.5O3 − δ and a cathode of Sm0.5Sr0.5CoO3 − δ are manufactured and tested using the voltammetry technique.
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Original Russian Text © A.I. Ivanov, D.A. Agarkov, I.N. Burmistrov, E.A. Kudrenko, S.I. Bredikhin, V.V. Kharton, 2014, published in Elektrokhimiya, 2014, Vol. 50, No. 8, pp. 814–820.
This publication was prepared based on a lecture delivered at the All_Russian Conference with international participation “Fuel Cells and Power Plants,” Chernogolovka, 2013.
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Ivanov, A.I., Agarkov, D.A., Burmistrov, I.N. et al. Synthesis and properties of fuel cell anodes based on (La0.5 + x Sr0.5 − x )1 − y Mn0.5Ti0.5O3 − δ (x = 0–0.25, y = 0–0.03). Russ J Electrochem 50, 730–736 (2014). https://doi.org/10.1134/S1023193514080047
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DOI: https://doi.org/10.1134/S1023193514080047