Recently magnesium-doped lanthanum gallate, LaxSr1-xGayMg1-yO3- (LSGM) because of its good ionic conductivity has been used as an electrolyte. This material exhibits excellent oxide ion conductivity in the intermediate temperature range and thus is suitable for studies where the goal is to develop materials for IT-SOFCs such as this work . The origin of this superior ionic conductivity is the vacancies created in the perovskite structure of lanthanum gallate (LaGaO3) by doping strontium and magnesium at A and B sites respectively. In particular, two main compositions being used by researchers are La0.8Sr0.2Ga0.8Mg0.2O3- (LSGM8282) and La0.9Sr0.1Ga0.8Mg0.2O3- (LSGM9182). LSGM8282 presents the best ionic conductivity of 0.14 Scm -1 at 700 °C as compared to the relatively lower value of 0.12 Scm -1 at the same temperature 100 . These materials further show compatible TEC 12.0 × 10 -6 K -1 and are thus widely used as electrolytes in IT-SOFCs research. Figure demonstrates the comparison of ionic conductivity of the three conventional electrolyte materials discussed 101 .