ADVANCED PERFORMANCE OF LaBaCo2O5+ DOUBLE-PEROVSKITE TYPE AS A LOW-TEMPERATURE SOFC CATHODE MATERIAL
Keywords:
Double perovskite cathode, Mixed conductor, Solid oxide fuel cell, Electrical conductivityAbstract
A new double perovskite structure of LaBaCo2O5+ was simply synthesized via a traditional solid state reaction. X-ray diffraction analysis of LaBaCo2O5+ powder was conducted after calcination at 1,100oC for 2 h in air indicated that a single phase of the double-perovskite type with a cubic structure. The electrical conductivity of LaBaCo2O5+ was mixed between semiconducting and metallic conducting behaviors, with an operating temperature range of 100–800oC. LaBaCo2O5+ exhibited the highest electrical conductivity, with a value of 320 S/ cm at 240oC. Therefore, the LaBaCo2O5+ cathode type can be utilized as a low-temperature SOFC cathode material.
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