A fuel cell is a device for direct conversion chemical energy to electrical energy. Among different kinds of fuel cells, Solid Oxide Fuel Cells (SOFCs) have received tremendous attention due to their high efficiency, long-term stability, fuel flexibility, and low emissions in high operating temperature. The biggest disadvantage is high operating temperature. One way to overcome this issue is to improve the structural and functional characteristics of available cathodes. In this investigation, La 0.6 Ca 0.4 Ni 1-x Co x O 3- ? (0?x?0.5) as the catode of SOFC was used because of its good electron and ion conductivity. The powder of LCNC oxides was prepared by Sol-gel method for Solid Oxide Fuel Cells cathode applications. The lattice parameters, electrical conductivity, activation energy, and microstructures of these specimens were investigated systematically in this study. Crystal structure were studied by X-Ray diffraction (XRD). X-Ray patterns show rhombohedrol structures and appears a secondary phase of NiO. The electrical resistivity of specimens were measured from room temperature up to operating temperature of IT-SOFC (800? C) by four-point probe method in air atmosphere. The results revealed thate as the Co amount increases, the electrical conductivity are decreased (except x=0.4). The activation energy calculated from the Arrhenius plot of the electrical conductivity that La 0.6 Ca 0.4 Ni 0.5 Co 0.5 O 3 had the minimum activation energy. Scanning electron microscope used to study the microstructures of the particles. In the end Electrochemical impedance measurement used to observe the Electrochemical of symmetric cell with LCNC cathode and YSZ(8%) electrolyte. The area specific resistance (ASR) decreas with increase in the measurement temperatur and as the Co amount increases, the ASR are decreased (except x=0.1). Results show that La 0.6 Ca 0.4 Ni 0.5 Co 0.5 O 3 is a good candidate to be used as cathode in intermediate Solid Oxide Fuel Cells.