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Development of improved
cathode materials for solid oxide fuel cells
Rasit Koc
The
objective of this research is to introduce the undergraduate students
to advanced materials based on perovskites, which are used to fabricate
components for solid oxide fuel cells (SOFC) and sensors.
Perovskite-type oxides of the ABO3 structure (A=La, Ba, Sr, Ca and
B=Cr, Mn, Co, Fe) are known to be refractory and possess high
electrical conductivity at elevated temperatures. Rare earth chromites
of the perovskite structure are stable in both oxidizing and reducing
conditions at high temperatures (>1000°C). They have been
successfully used in various applications including high temperature
electrodes, heating elements and in solid oxide fuel cells (SOFC). The
REU students will gain hands-on experience on the preparation,
fabrication and properties of these advanced materials and the effects
of chemistry, structure, processing, and microstructure on these
materials. They will be gaining the basic knowledge of the functions of
advanced materials in energy systems.
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