INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Study of the Electrochemical Mechanisms That Control the Electrode Reaction and Degradation of La0.6Sr0.4Co0.8Fe0.2O3-δ cathodes Impregnated with Oxide Nanoparticles
Autor/es:
LILIANA V. MOGNI; ESTEBAN GIORIA; HORACIO TROIANI; JULIAN ASCOLANI-YAEL; ALEJANDRA MONTENEGRO-HERNÁNDEZ
Lugar:
Cancun
Reunión:
Congreso; AiMES 2018. International Meeting of Electro Chemical Society; 2018
Institución organizadora:
Electro Chemical Society
Resumen:
From the impregnation of Ce and Pr, there were successfully synthesized nanoparticles of his oxides on the perovskita La0.6Sr0.4Co0.8Fe0.2O3 (LSCF) used as cathode in Solid Oxide Fuel Cells, in order to reduce the polarization resistances in the above mentioned materials.Dense CGO substrate from commercial Praxair powders where used as electrolyte. In order to obtain symmetrical electrodes of type LSCF/CGO/LSCF, the Spin Coating technique was used for the electrode deposition. The characterization of the developed materials was realized by means of X-rays diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). To corroborate the improvement in the reduction of the resistances of polarization, electrochemical impedance spectroscopy (EIS) measurements were carried out of in the range of 400 °C to 700 °C.The developed materials not only presented metallic oxides of nanometric size, but also they were stable in the conditions of evaluated temperature and time. It is necessary to emphasize that the proposed aim was successfully achieved, since the values of area specific resistance diminished notably using both Ce and Pr. Best results were obtained for the sample with PrO2 and is one of the best values obtained by the group up to the date