Synthesis and Characterization of Ba0.8Sr0.2Ce1-xZrxY0.1O3- Proton-Conducting Electrolyte for Solid Oxide Fuel Cell.
Dr.J.Madhuri Sailaja, V. Veeraiah
Ba0.8Sr0.2Ce0.9-xZr0.2Y0.1O3-, Chemical stability, Proton conducting electrolyte, Raman, Solid oxide Fuel Cell, Sol-Gel synthesis
Proton conducting oxides Ba0.8Sr0.2Ce0.9-xZrxY0.1O3- (0≤x≤0.2) are prepared using the citrate-EDTA complexing sol-gel method. The effect of zirconium doping on the material properties are systematically investigated. The phase, Thermal analysis, Morphology, chemical Stability and Conductivity measurements are performed on the sintered powders through TGDTA, XRD, SEM, EDAX, FTIR, RAMAN and LCR measurements. The results indicated that a single phase Orthorhombic system. Zirconium doping helped in increasing the grain size while reducing the lattice parameters and unit cell volume. The ionic conductivities of the Ba0.8Sr0.2Ce0.9-xZrxY0.1O3- sintered oxides increased with increase in the concentration of Zr Among the synthesized samples of Ba0.8Sr0.2Ce0.7Zr0.2Y0.5O3-pellet showed the highest conductivity with a value of 2.05x10-3S/cm at 500°C due to its smaller lattice volume, larger grain size and lower activation energy. All pellets exhibited good chemical stability when exposed to air and H2o atmospheres. These results indicate that this composition can be used as a potential electrolyte if synthesis conditions and temperature are well maintained.
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Unique Paper ID: 154139

Publication Volume & Issue: Volume 8, Issue 10

Page(s): 186 - 194
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