In this work, of Lithium and Samarium doped (Li-SDC) is synthesized by means of process to obtain dense electrolyte material for low temperature Solid Oxide Fuel Cell () without any agent. The crystalline structure of material is examined by X-ray diffraction (XRD). The fuel cell performance is obtained at temperature range 500-550 . The conductivity of material was measured by 4-probe method. The prepared material morphology and analysis was studied by scanning electron microscope (SEM) images. The best results are obtained with sample which was prepared by process gives 0.016 S/cm conductivity and it shows maximum power density of 0.2 W/cm² at 500 and 0.3 W/cm² at 550 respectively using natural gas as fuel. These results prevailed that the prepared electrolyte using is best for low temperature SOFC. It is also noticed that as electrolyte ionic conductivity increases the performance of cell is also enhanced.