Thermal, electrical, and electrocatalytical properties of lanthanum-doped strontium titanate

Thermal, electrical and electrocatalytical properties of La x Sr 1− x TiO 3, where x=0.1, 0.2, 0.3, 0.35, and 0.4, perovskite compositions are studied in relation to their potential use as solid oxide fuel cell (SOFC) anode materials. An emphasis is made on the effect of oxidation–reduction cycling...

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Bibliographic Details
Published in:Solid state ionics 2002-07, Vol.149 (1), p.21-28
Main Authors: Marina, Olga A., Canfield, Nathan L., Stevenson, Jeff W.
Format: Article
Language:English
Subjects:
30 DIRECT ENERGY CONVERSION
ANODES
Applied sciences
CONTRACTION
ELECTRIC CONDUCTIVITY
Electrical conductivity
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Lanthanum-doped strontium titanate
Oxidation–reduction cycling
OXYGEN
PARTIAL PRESSURE
PEROVSKITE
SOFC anode
SOLID OXIDE FUEL CELLS
STRONTIUM TITANATES
THERMAL EXPANSION
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Summary:Thermal, electrical and electrocatalytical properties of La x Sr 1− x TiO 3, where x=0.1, 0.2, 0.3, 0.35, and 0.4, perovskite compositions are studied in relation to their potential use as solid oxide fuel cell (SOFC) anode materials. An emphasis is made on the effect of oxidation–reduction cycling on these properties. Depending on the dopant amount, x, and the oxygen partial pressure, La x Sr 1− x TiO 3 possesses an electrical conductivity on the order of 0.01–500 S/cm at 800–1000 °C. The thermal expansion of La x Sr 1− x TiO 3 is close to that of yttria-stabilized zirconia (YSZ). No significant chemical expansion or contraction of La x Sr 1− x TiO 3 with x
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(02)00140-6