Materials and Resources

Within the series of dual phase membranes 60 wt % Ce 0.8 M 0.2 O 2–δ (M = La, Pr, Nd, Sm, Gd) – 40 wt % La 0.5 Sr 0.5 Fe 0.8 Cu 0.2 O 3–δ (CMO-LSFCO) the critical factors influencing the oxygen permeability, which may provide guidelines for designing further high performance dual-phase oxygen transport membranes have been systematically investigated. As important factor the electrical conductivity of the typically considered just as ionic conducting phase rare earth doped ceria has been added to the check list of material design. This can be associated with a good percolation offering different transfer paths based on the correlations between membrane material characterization and oxygen permeability. The small particle size and high electronic conductivity of the CGO phase resulted in the best performance under air/He and air/CO 2 gradients. G. Chen, Z. Zhao, M. Widenmeyer, T. Frömling, T. Hellmann, R. Yan, F. Qu, G. Homm, J. P. Hofmann, A. Feldhoff, A. Weidenkaff, A comprehensive comparative study of CO2-resistance and oxygen permeability of 60 wt % Ce 0.8 M 0.2 O 2–δ (M = La, Pr, Nd, Sm, Gd) – 40 wt % La 0.5 Sr 0.5 Fe 0.8 Cu 0.2 O 3–δ dual-phase membranes, J. Membr. Sci. 2021, 639, 119783. https://doi.org/10.1016/j.memsci.2021.119783