BARC/PUB/2019/1040

 
 

Chemical compatibility study of BSCF cathode materials with protonconducting BCY/BCZY/BZY electrolytes

 
     
 
Author(s)

Mahadik, P. S.; Shirsat, A. N.; Saha, B.; Tyagi, D.; Varma, S.; Wani, B. N.; Bharadwaj, S. R.; and others
(ChD)

Source

Journal of Thermal Analysis and Calorimetry, 2019. Vol. 137: pp. 1857-1866

ABSTRACT

Ba0.5Sr0.5Co1-xFexO3-δ (BSCF) is a well-recognized cathode material for IT-SOFC. In this work, Ba0.5Sr0.5Co1-xFexO3-δ(BSCF) where x = 0.2, 0.4, 0.6, 0.8 compositions were synthesized by gel-combustion method using glycine as a fuel. Powder X-ray diffraction confirms the formation of single phase for all the compositions. As we are looking for the application of BSCF cathode for proton-conducting SOFCs, compatibility studies were made with BaCe0.8Y0.2O3-δ (BCY), BaCe0.4Zr0.4Y0.2O3-δ (BCZY) and BaZr0.8Y0.2O3-δ (BZY) electrolytes which are known to have good protonconducting properties at elevated temperatures. Ba0.5Sr0.5Co0.4Fe0.6O3-δ (BSC4F6) and Ba0.5Sr0.5Co0.2Fe0.8O3-δ (BSC2F8) compositions showed good chemical compatibility with selected electrolyte materials at cell fabrication as well as cell operating temperature making them an appropriate cathode material. Electrical property of all the BSCF compositions was measured in air up to 1073 K by four-probe dc technique. The results showed very little effect of Fe substitution on electrical properties.

 
 
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