“…To solve the problem of such high working temperature, screening and characterizing the candidate electrolyte onsets in lower temperature without sacrificing high oxygen ion transportation ability, become urgent. Previous reports proved that native defects could be a predominant factor that controlled the oxygen ion motion of electrolyte [7], in which anion Frenkel (a-Fr) pairs are the most important one, as well as in β-La2Mo2O9 at evaluated temperature [8][9][10].…”