Nanostructured La1-aSraCo1-bFebO3-x (a=0.3-0.5; b=0-0.2) and Ce0.8Sm0.2O2 powders were successfully prepared by citrate-nitrate auto-combustion synthesis and were characterized by scanning electron microscopy and X-ray diffraction analysis. Electrochemical Impedance Spectroscopy measurements on symmetric cells were performed to evaluate the applicability of La1-aSraCo1-bFebO3-x as a cathode material for Single Chamber Solid Oxide Fuel Cells. Our results demonstrated that strontium has a positive effect while iron shows a slightly negative effect on the interfacial resistance. The effect of the electrode sintering temperature was investigated by varying the temperature from 850 °C to 1250 °C and the best sintering temperature was found to be 900 °C. The best characteristics as cathode around the operating temperature of Single Chamber Fuel Cells were found for the composition with a=0.4 and the minimum iron doping; at 700°C, an Area Specific Resistance of 0.13 Ω·cm2 was measured.
|Journal||E C S Transactions|
|Publication status||Published - 2006|
|Event||208th ECS Meeting - Los Angeles, California, United States|
Duration: 16 Oct 2005 → 21 Oct 2005
|Conference||208th ECS Meeting|
|City||Los Angeles, California|
|Period||16/10/2005 → 21/10/2005|