Synthesis of LaNi_0,6Fe_0,4O_3-δ (LNF64) by Pechini Method for Use as Cathode in SOFC´S

Abstract:

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 ZrO₂-Y₂O₃. 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_0,6Fe_0,4O_3-δ, 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_0,6Fe_0,4O_3-δ 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°C during 2 hours.

• Periodical: Materials Science Forum (Volume 805)
• Pages: 513-518
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.805.513
• Online since: September 2014
• Authors: Kethlinn Ramos*, Leonardo Pacheco Wendler, Adriana Scoton Antonio Chinelatto, Adilson Luiz Chinelatto
• Keywords: Cathode, LaNi_0.6Fe_0.4O_3−δ, Pechini Method, Peroviskites

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