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Synthesis, structure and properties of LnBa(Co,Me)2O5+δ (Ln = Nd, Sm, Ho and Y; Me = Fe, Ni, Cu) as potential cathodes for SOFCs

Published online by Cambridge University Press:  16 February 2012

Vladimir A. Cherepanov
Affiliation:
Department of Chemistry, Ural Federal University, Mira str., 19 Yekaterinburg, 620002, Russia
Ludmila Ya. Gavrilova
Affiliation:
Department of Chemistry, Ural Federal University, Mira str., 19 Yekaterinburg, 620002, Russia
Tatyana V. Aksenova
Affiliation:
Department of Chemistry, Ural Federal University, Mira str., 19 Yekaterinburg, 620002, Russia
Anastasiya S. Urusova
Affiliation:
Department of Chemistry, Ural Federal University, Mira str., 19 Yekaterinburg, 620002, Russia
Nadezhda E. Volkova
Affiliation:
Department of Chemistry, Ural Federal University, Mira str., 19 Yekaterinburg, 620002, Russia
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Abstract

Layered LnBa(Co,Me)2O5+δ (Ln = Nd, Sm, Ho and Y; Me = Fe, Ni, Cu) with double perovskite structure were synthesized by the solid-state reaction and glycerin-nitrate technique and characterized by X-ray diffraction, thermogravimetric analysis, iodometric titration and dilatometry. Homogeneity ranges for the solid solutions were determined. The oxygen content in LnBa(Co,Me)2O5+δ decreases with decreasing rare-earth cation size. Partial substitution of cobalt by iron increases oxygen content while introduction of copper decrease it. The average thermal expansion coefficients were calculated. Chemical compatibility of studied perovskites with Ce0.8Sm0.2O2 and Zr0.85Y0.15O2 solid electrolytes has been studied.

Type
Research Article
Copyright
Copyright © Materials Research Society 2012

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Synthesis, structure and properties of LnBa(Co,Me)2O5+δ (Ln = Nd, Sm, Ho and Y; Me = Fe, Ni, Cu) as potential cathodes for SOFCs
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Synthesis, structure and properties of LnBa(Co,Me)2O5+δ (Ln = Nd, Sm, Ho and Y; Me = Fe, Ni, Cu) as potential cathodes for SOFCs
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Synthesis, structure and properties of LnBa(Co,Me)2O5+δ (Ln = Nd, Sm, Ho and Y; Me = Fe, Ni, Cu) as potential cathodes for SOFCs
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