Synthesis and Characterization of Ni  Doped BSCF as a Cathode Material for ITSOFC

Suman Kumar Burnwal; M. Buchi Suresh; P. Kistaiah

Volume : II, Issue : IX, September - 2013

Synthesis and Characterization of Ni Doped BSCF as a Cathode Material for ITSOFC

Suman Kumar Burnwal, M. Buchi Suresh, P. Kistaiah

Abstract :

Nanocrystalline powders of Ba0.5Sr0.5CoxFe1–x–yNiyO3–δ (x=0.4; y=0.05. 0.1, 0.15 and 0.2) have been synthesized by sol–gel process. The gel precursors obtained was calcined at various temperatures and the phase evolution was studied by XRD analysis. From the result of X–ray diffraction (XRD) patterns, it is found that a well crystalline cubic perovskite Ba0.5Sr0.5CoxFe1–x–yNiyO3–δ (BSCFNi) was obtained by calcining the precursor at 1000 oC for 4 hrs. Morphological analysis of the samples was done by scanning electron microscope (SEM). TGA results showed the lattice oxygen loss of the product was about ~2 % in its original weight in the temperature range 40–900 oC. In addition, AC impedance data revealed the better electrochemical performance of BSCFNi measured in the frequency range of 0.1 Hz to 1 MHz in relation to their potential use as intermediate temperature (700–800 oC) SOFC cathode. An emphasis is made on the effect of Ni doping on these properties.