Calcium-containing cathodic material for solid oxide fuel cells

I. S. Bredikhin, F. S. Napol'Skii, E. V. Korovkin, S. Ya Istomin, E. V. Antipov, S. I. Bredikhin

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Using the citrate sol-gel method, a new complex oxide Ca 0.75Y0.25Co0.15Mn0.85O 2.92 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 Ca 0.75Y0.25Co0.15Mn0.85O 2.92 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 Ca0.75Y 0.25Co0.15Mn0.85O2.92 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.

Original languageEnglish
Pages (from-to)434-438
Number of pages5
JournalRussian Journal of Electrochemistry
Volume45
Issue number4
DOIs
Publication statusPublished - Apr 2009
Externally publishedYes

Keywords

  • CaYCoMn cathode
  • Perovskite
  • Solid oxide fuel cell
  • Superionic conductor

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