Synthesis and characterization of the composite formed by Ba (Ce0,2Zr0,7Y0,1) O3-d-La0,7Sr0,3FeO3-d for use in fuel cells.

Reference	Presenter	Authors (Institution)	Abstract
06-090	Adilson Luiz Chinelatto	Chinelatto, A.L.(Universidade Estadual de Ponta Grossa); Borsato, A.F.(Universidade Estadual de Ponta Grossa); Baldykowski, G.L.(Universidade Estadual de Ponta Grossa); Grzebielucka, E.C.(Universidade Estadual de Ponta Grossa); Chinelatto, A.S.(Universidade Estadual de Ponta Grossa);	Currently, new sources of clean and renewable energy generation have been studied. Fuel cells have stood out in this scenario because of their high efficiency and low pollution when compared to technologies based on fossil fuels. In this work, the synthesis and characterization of the composite formed by Ba Ce0,2 Zr0,7 Y0,1 O2,85 (BCZY) and La0,7 Sr0,3 Fe O2,85 (LSF) was studied in order to know the viability of its application as a cathode in solid oxide fuel cells. The BCZY and LSF powders were synthesized by the modified Pechini method. The powders were mixed in a ball mill in a 1: 1 mass ratio, then the powders were pressed and sintered at temperatures of 1100 and 1400 °C for 2 h. The specimens obtained from this mixture were characterized by X-ray diffraction, scanning electron microscopy, X-ray dispersive energy spectrometry, impedance spectroscopy, bulk density and apparent porosity. From the analysis performed the X-ray diffraction indicated that the sample sintered at 1100 °C only showed the phases BCZY and LSF. The sample sintered at 1400 °C presented a small amount of third phase. The porosity and conductivity measurements showed that the sintered composition at 1400 °C had minimal conditions of porosity and conductivity to be used as cathode in fuel cells.
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