Grain boundary scavenging through reactive sintering of strontium and iron in samarium doped ceria electrolyte for ITSOFC applications

2018 ◽  
Vol 100 ◽  
pp. 446-457 ◽  
Author(s):  
Preethi Sudarsan ◽  
Suresh Babu Krishnamoorthy
Keyword(s):  
Grain Boundary ◽  
Doped Ceria ◽  
Reactive Sintering ◽  
Boundary Scavenging ◽  
Ceria Electrolyte

Effect of titania concentration on the grain boundary conductivity of calcium-doped ceria electrolyte

2014 ◽  
Vol 40 (7) ◽  
pp. 9775-9781 ◽  
Author(s):  
M. Ajmal Khan ◽  
Rizwan Raza ◽  
Raquel B. Lima ◽  
M. Asharf Chaudhry ◽  
E. Ahmed ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Doped Ceria ◽  
Boundary Conductivity ◽  
Calcium Doped ◽  
Ceria Electrolyte

scholarly journals Ba0.5Sr0.5Co0.8Fe0.2O3–δ–La0.6Sr0.4Co0.8Fe0.2O3–δ Composite Cathode for Solid Oxide Fuel Cell

2016 ◽  
Vol 61 (3) ◽  
pp. 1483-1488 ◽  
Author(s):  
M. Mosiałek ◽  
A. Kędra ◽  
M. Krzan ◽  
E. Bielańska ◽  
M. Tatko
Keyword(s):  
Electrochemical Impedance ◽  
Specific Resistance ◽  
Weight Ratio ◽  
Composite Cathode ◽  
Solid Oxide ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Composite Cathodes ◽  
Area Specific Resistance ◽  
Ceria Electrolyte

Abstract Composite cathodes contain Ba0.5Sr0.5Co0.8Fe0.2O3–δ and La0.6Sr0.4Co0.8Fe0.2O3–δ were tested in different configuration for achieving cathode of area specific resistance lower than Ba0.5Sr0.5Co0.8Fe0.2O3–δ and La0.6Sr0.4Co0.8Fe0.2O3–δ cathodes. Electrodes were screen printed on samaria-doped ceria electrolyte half-discs and tested in the three electrode setup by the electrochemical impedance spectroscopy. Microstructure was observed by scanning electron microscopy. The lowest area specific resistance 0.46 and 2.77 Ω cm−2 at 700 °C and 600 °C respectively revealed composite cathode contain Ba0.5Sr0.5Co0.8Fe0.2O3–δ and La0.6Sr0.4Co0.8Fe0.2O3–δ in 1:1 weight ratio. The area specific resistance of this cathode is characterized by the lowest activation energy among tested cathodes.

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