| abstract |
Disclosed is a solid state electrolyte comprising a compound of Formula 1 n Li 7−a*α−(b−4)*β−x M a α La 3 Hf 2−β M b β O 12−x−δ X x (1)n n whereinn M a is a cationic element having a valence of a+; M b is a cationic element having a valence of b+; and X is an anion having a valence of −1, wherein, when M a includes H, 0≤α≤5, otherwise 0≤α≤0.75, and wherein 0≤β≤1.5, 0≤x≤1.5, and (a*α+(b−4)β+x)>0, 0≤δ≤1. |