Bell, Robert L.

Method of making room temperature stable δ-phase bismuth(III) oxide

Provided is room temperature stable δ-phase Bi 2 O 3 . Ion conductive compositions comprise at least 95 wt % δ-phase Bi 2 O 3 , and, at 25° C., the compositions are stable and have a conductivity of at least 10 −7 S/cm. Related methods, electrochemical cells, and devices are also disclosed.