Lanthanum strontium cobalt ferrite

Lanthanum strontium cobalt ferrite (LSCF), also called lanthanum strontium cobaltite ferrite is a specific ceramic oxide derived from lanthanum cobaltite of the ferrite group. It is a phase containing lanthanum(III) oxide, strontium oxide, cobalt oxide and iron oxide with the formula La
_xSr
_1−xCo
_yFe
_1−yO
₃, where 0.1≤x≤0.4 and 0.2≤y≤0.8.^[1]

It is black in color and crystallizes in a distorted hexagonal perovskite structure.^[2] LSCF undergoes phase transformations at various temperatures depending on the composition. This material is a mixed ionic electronic conductor with comparatively high electronic conductivity (200+ S/cm) and good ionic conductivity (0.2 S/cm).^[3] It is typically non-stoichiometric and can be reduced further at high temperature in low oxygen partial pressures or in the presence of a reducing agent such as carbon.^[4]

LSCF is being investigated as a material for intermediate temperature solid oxide fuel cell cathodes and, potentially as a direct carbon fuel cell anode.^[2]

LSCF is also investigated as a membrane material for separation of oxygen from air, for use in e.g. cleaner burning power plants.^[5]

References

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^ Chang, Hun-Chieh; Tsai, Dah-Shyang; Chung, Wen-Hung; Huang, Ying-Sheng; Le, Minh-Vien (27 April 2009). "A ceria layer as diffusion barrier between LAMOX and lanthanum strontium cobalt ferrite along with the impedance analysis". Solid State Ionics. 180 (4–5): 412–417. doi:10.1016/j.ssi.2009年01月01日8.
^ ^a ^b Kulkarni, A.; Ciacchi, F.T.; Giddey, S.; Munnings, C.; Badwal, S.P.S.; Kimpton, J.A.; Fini, D. (December 2012). "Mixed ionic electronic conducting perovskite anode for direct carbon fuel cells". International Journal of Hydrogen Energy. 37 (24): 19092–19102. Bibcode:2012IJHE...3719092K. doi:10.1016/j.ijhydene.2012年09月14日1.
^ Badwal, SPS; Giddey, S; Munnings, C; Kulkarni, A (2014). "Review of Progress in High Temperature Solid Oxide Fuel Cells". Journal of the Australian Ceramics Society. 50 (1).
^ Munnings, C.; Kulkarni, A.; Giddey, S.; Badwal, S.P.S. (August 2014). "Biomass to power conversion in a direct carbon fuel cell". International Journal of Hydrogen Energy. 39 (23): 12377–12385. Bibcode:2014IJHE...3912377M. doi:10.1016/j.ijhydene.2014年03月25日5.
^ "Ceramic Tubes Could Cut Greenhouse Gas Emissions From Power Stations". ScienceDaily. Retrieved 2020年10月08日.