Abstract
Oxide ion conductor is an improtant material for electrolyte. In this study, oxide ion conductivity in LaGaO3 and Pr2NiO4 based perovskite oxide will be introduced. In case of LaGaO3, fast oxide ion conductivity is assigned to the large mobility of oxygen vacancy due to the large free volume. On the other hand, clusterization of oxygen vacancy is observed at lower dopant level comparing with that of considered. In case of Pr2NiO4 perovskite related oxide, oxide ion conductivity is occurred by using interstitial oxygen and increasing the amount of interstitial oxygen is effective for increasing the oxide ion conductivity.
