YSr2Fe3-xCoxO8 as a Potential Cathode Materials for SOFCs

The composition YSr2Fe3-xCoxO8 (for x = 0.5, 3.0) has been investigated as an alternative cathode material for Solid Oxide Fuel Cells (SOFCs). X-ray diffraction (XRD) pattern shows that the composition YSr2Fe2.5Co0.5O8 crystallizes with cubic symmetry in the space group Pm-3m and YSr2Co3O8 crystallizes with tetragonal symmetry in the space group P4/mmm. Rietveld refinement of XRD data shows the cell parameter of the cubic YSr2Fe2.5Co0.5O8 is a = b = c = 4.1964(2) (Å) and tetragonal YSr2Co3O8 is a = b = 9.8998(9) (Å) and c = 8.9617(6) (Å). Scanning electron microscropy (SEM) images show porous structure for both the samples, which is favourable as a cathode for Solid Oxide Fuel Cells.