Lanthanum strontium cobalt ferrite (LSCF 6428) is a promising cathode material, which has a low operating temperature. It has a high ionic and electronic conductivity with a high electrocatalytic activity.LSCF- 6428 is a mixed ionic and electron conducting pervoskite. The ionic conductivity is lower than YSZ although maintaining high conductivity. X-ray diffraction and electrochemical measurements of an operational LSCF-6428 cathode was conducted to study its lattice expansion during use. LSCF-6428 can be prepared by solid state reaction of individual cation oxides.LSCF-6428 may be used as the cathode in solid oxide fuel cells (SOFCs).