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Calcium-containing cathodic material for solid oxide fuel cells

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Abstract

Using the citrate sol-gel method, a new complex oxide Ca0.75Y0.25Co0.15Mn0.85O2.92 is synthesized. It is shown that this compound is crystallized in the rhombically distorted version of perovskite structure (a = 0.53397(8), b = 0.7470(1), c = 0.52810(6) nm). The phase is characterized by a low coefficient of thermal expansion (CTE) (13.8 ppm K−1) and high electric conductivity (135 S/cm at 900°C). The chemical reaction between Ca0.75Y0.25Co0.15Mn0.85O2.92 and the YSZ and GDC electrolyte materials is studied. The material is highly reactive and reacts with YSZ and GDC at 900°C and 1070°C, respectively. It is concluded that Ca0.75Y0.25Co0.15Mn0.85O2.92 is a promising cathodic material for solid oxide fuel cells, provided a reliable protection SDC sublayer is formed between the cathode and the YSZ membrane.

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Authors and Affiliations

  1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast’, 142432, Russia

    I. S. Bredikhin, E. V. Korovkin & S. I. Bredikhin

  2. Faculty of Chemistry, Moscow State University, Vorob’evy Gory, Moscow, 119991, Russia

    S. Ya. Istomin & E. V. Antipov

  3. Faculty of Material Sciences, Moscow State University, Vorob’evy Gory, Moscow, 119991, Russia

    F. S. Napol’skii

Authors
  1. I. S. Bredikhin
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  2. F. S. Napol’skii
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  3. E. V. Korovkin
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  4. S. Ya. Istomin
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  5. E. V. Antipov
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  6. S. I. Bredikhin
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Correspondence to I. S. Bredikhin.

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Original Russian Text © I.S. Bredikhin, F. S. Napol’skii, E. V. Korovkin, S. Ya. Istomin, E. V. Antipov, S.I. Bredikhin, 2009, published in Elektrokhimiya, 2009, Vol. 45, No. 4, pp. 463–467.

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Bredikhin, I.S., Napol’skii, F.S., Korovkin, E.V. et al. Calcium-containing cathodic material for solid oxide fuel cells. Russ J Electrochem 45, 434–438 (2009). https://doi.org/10.1134/S1023193509040120

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  • DOI: https://doi.org/10.1134/S1023193509040120

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