DEVELOPMENT OF CERAMIC MATERIALS PrNiO3 AND PrCoO3 FOR APPLICATION IN CATHODE OF SOLID OXIDE CELLS

Reference	Presenter	Authors (Institution)	Abstract
13-008	Virgínia Vieira Aires	Aires, V.V.(Universidade Federal da Paraíba); Queiroz, D.F.(Universidade Federal da Paraíba); Aquino, F.d.(Universidade Federal da Paraíba); da Silva, I.B.(Universidade Federal da Paraíba); Almeida, T.d.(Universidade Federal da Paraíba);	In view of a high demand for renewable and non-polluting energy sources, the progress of research involving fuel cells comes as a viable solution. Among the cells, the one that stands out is the solid oxide, which works at intermediate temperatures (IT-SOFC – 500 to 800 °C). The aim of this study is to analyze materials with perovskite structure, trying to develop increasingly efficient cathodes. The ceramic oxides PrNiO3 (Praseodymium nickel) and PrCoO3 (Praseodymium cobalt) were made from the gelatin method. The gelatin was used as a polymerizing and coordinating agent. After the process, the X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) characterized the ceramic powders obtained. It proved that the peroviskite phase is present in all X-Ray diffractograms. The cathodic materials exhibited porous characteristics as seen by the images (or micrographs) of SEM. According to these preliminary results, the technique of “Screen-printing” was applied for the serigraphy of the cathodic material in the electrolyte (Ce0,9Gd0,1O2-?) to evaluate the cathode kinetics of the reduction reaction in the cathodic structure from the impedance spectroscopy. Finally, it is expecting to determine if the materials will have present potential application for ceramic cathodes for IT-SOFC and if their costs will be feasible.
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