Novel Li⁺ Ion-conductive Solid of LiNO₃ with (Gd_0.9La_0.1)₂O₃

Abstract

A new type of lithium ion conducting solid electrolyte, LiNO₃ with (Gd_0.9La_0.1)₂O₃, was successfully developed. The highest lithium ion conductivity of 2.02 × 10⁻¹ S·cm⁻¹ was obtained at 773 K for the 0.325(Gd_0.9La_0.1)₂O₃-0.35LiNO₃ solid whose composition is the solubility limit of LiNO₃ into (Gd_0.9La_0.1)₂O₃ crystal lattice. Since the Li⁺ ion conductivity was comparable to that of the highest one of LISICON series, the present 0.325(Gd_0.9La_0.1)₂O₃-0.35LiNO₃ solid was expected to be one of suitable candidates for practical Li⁺ ion conducting solids.