Ni-BaCe0,2Zr0,7Y0,1O3-d SINTESYS FOR USE IN SOLID OXIDE FUEL CELL

Reference	Presenter	Authors (Institution)	Abstract
06-087	Melina Taciele de Oliveira Favaro	Chinelatto, A.L.(Universidade Estadual de Ponta Grossa); Favaro, M.T.(Universidade Estadual de Ponta Grossa); Chinelatto, A.S.(Universidade Estadual de Ponta Grossa); Grzebielucka, E.C.(Universidade Estadual de Ponta Grossa);	In the face of all the environmental problems that have been discussed for some decades, various alternatives have been developed for an energy generation that partially or totally replaces fossil sources. Among these alternatives, solid oxide fuel cells are gaining prominence due to their efficiency and very low generation of waste. Like any technological innovation, many challenges still need to be overcome and there is much research to improve the various parameters of these cells, such as: cell composition materials, temperature of use and energy efficiency. The present work studied the cermet formed by BaCe0,2Zr0,7Y0,1O3-? (BCZY) with a second metallic phase of nickel to be used as anode of the solid oxide fuel cell. The BCZY ceramic phase was synthesized by the modified Pechini method and calcined at 900 ° C. The BCZY was mixed with the nickel oxide in proportions (wt%) of 50:50, 30:70 and 70:30 BCZY: NiO respectively. The powders were pressed and sintered at 1400ºC for 4h. The composite was heat treated at 900 ° C for 4h in an H-rich atmosphere to reduce NiO to Ni metal. The sintered samples were characterized by X-ray diffraction (XRD) measurements using Rietveld method, scanning electron microscopy (SEM), apparent density, apparent porosity and water absorption and conductivity measurements by impedance spectroscopy . The results of SEM and XRD showed that the temperature of 900ºC for 4h in atmosphere in an H-rich was enough to reduce NiO to Ni. The sintering temperature of 1400ºC generated a porosity around 30%, which is compatible for use in electrodes. The impedance spectroscopy measurements showed the presence of electronic conductivity.
<< Back