Synthesis of LaNi sub(0,6)Fe sub(0,4)O sub(3- delta ) (LNF64) by Pechini Method for Use as Cathode in SOFC'S

The solid oxide fuel cell are an alternative of production clean and efficient energy, because converts chemical energy in electrical energy. A fuel cell is formed basically by an electrolyte, a cathode and an anode. The main electrolyte used for SOFC manufacturing is the ZrO sub(2)-Y sub(2)O sub(3). The materials for electrode manufacturing must possess thermal expansion characteristics close to electrolyte and have high electrical conductivity in operating temperature. Recently, the perovskite LaNi sub(0,6)Fe sub(0,4)O sub(3- delta ), has attracted interest for application as cathode in SOFC's for has a high electronic conductivity and a thermal expansion coefficient whish for the zirconia electrolyte. This work aimed to LaNi sub(0,6)Fe sub(0,4)O sub(3- delta ) obtained by Pechini method. The powders were characterized by differential thermal analysis, thermogravimetric analysis, x-ray diffraction, energy dispersion X-ray fluorescence spectroscopy, helium pycnometry and scanning electron microscopy. The results showed powders obtained with perovskite formation when calcined 600[degrees]C during 2 hours.