Evaluation of layered perovskites YBa1−xSrxCo2O5+δ as cathodes for intermediate-temperature solid oxide fuel cells

Cobalt based layered perovskites as cathode material for intermediate temperature Solid Oxide Fuel Cells: A brief review

“…In order to maintain charge neutrality, for each oxygen vacancy ðv O Þ generated in the lattice during the heating process the loss of two p-type carriers ðCo Co Þ is needed, resulting in a conductivity decrease [76].…”

Oxygen Content and Thermodynamic Stability of YBaCo2O6−δ Double Perovskite

“…In this respect, YBaCo 2 O 6−δ has advantage as compared to other double perovskites since it has the lowest CTE among all REBaCo 2 O 6−δ oxides, which is close to that of doped ceria and zirconia, the state-of-the-art SOFC electrolytes [1][2][3][4][5][6]. is double perovskite was found to have the total conductivity high enough for using it as a cathode for IT SOFCs [6][7][8][9][10][11][12][13][14][15]. As a result, materials on the basis of YBaCo 2 O 6−δ showed high performance as cathodes of IT SOFCs [6,9,10,12,15] and oxygen permeable membranes [16,17].…”

“…is double perovskite was found to have the total conductivity high enough for using it as a cathode for IT SOFCs [6][7][8][9][10][11][12][13][14][15]. As a result, materials on the basis of YBaCo 2 O 6−δ showed high performance as cathodes of IT SOFCs [6,9,10,12,15] and oxygen permeable membranes [16,17]. It is generally recognized that knowledge of the thermodynamic stability limits of oxides materials is of key importance for understanding their properties and, therefore, their successful application in electrochemical devices for energy conversion and storage.…”

Study and optimization of the synthesis routine of the single phase YBaCo2O6-δ double perovskite

“…Complex oxide YBaCo 2 O 6-δ with double perovskite structure has been extensively investigated in recent years as a promising material for oxygen membranes [1,2] and solid oxide fuel cells (SOFCs) [3,6,7,9,12] due to high mixed ionic-electronic conductivity [12] and moderate thermal expansion comparable to that of the state-of-the art SOFC electrolytes [3]. However, YBaCo 2 O 6-δ is unstable in air at temperatures between 800 and 850 °C [13] and decomposes to mixture of the simple perovskites YCoO 3-δ and BaCoO 3-δ , which are more thermodynamically stable under these conditions.…”