1 Department of Energy Conversion and Storage, Technical University of Denmark2 Mixed Conductors, Department of Energy Conversion and Storage, Technical University of Denmark3 University of Science and Technology of China
The dual-phase Ce0.9Gd0.1O1.95–La0.6Sr0.4Co0.2Fe0.8O3−δ asymmetric membrane was prepared via a phase-inversion tape-casting method. The membrane consisted of a thicker porous support layer and a thinner dense layer. When the dense side of the membrane was coated with a La0.6Sr0.4CoO3−δ catalytic activation layer, the oxygen permeation flux was markedly increased by a factor of 4.1–5.6, reaching 0.45 mL cm−2 min−1 at 900 °C. The flux increase can be attributed to enhanced surface oxygen exhange kinetics.