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]

See also

References

  1. ^ 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.2009.01.018.
  2. ^ 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.2012.09.141.
  3. ^ 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).
  4. ^ 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.2014.03.255.
  5. ^ "Ceramic Tubes Could Cut Greenhouse Gas Emissions From Power Stations". ScienceDaily. Retrieved 2020-10-08.


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