Calcium-containing cathodic material for solid oxide fuel cells |
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| Authors: | I. S. Bredikhin F. S. Napol’skii E. V. Korovkin S. Ya. Istomin E. V. Antipov S. I. Bredikhin |
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| Affiliation: | (1) Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast’, 142432, Russia;(2) Faculty of Chemistry, Moscow State University, Vorob’evy Gory, Moscow, 119991, Russia;(3) Faculty of Material Sciences, Moscow State University, Vorob’evy Gory, Moscow, 119991, Russia |
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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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| Keywords: | superionic conductor perovskite CaYCoMn cathode solid oxide fuel cell |
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