Synthesis and high Li-ion conductivity of Ga-stabilized cubic Li7La3Zr2O12

► The Li-ion conductivity of hot-pressed Ga-substituted Li7La3Zr2O12 was ∼3.5 × 10−4 Scm−1. ► The electronic conductivity was ∼7.1 × 10−8 Scm−1. ► Ga-substituted Li7La3Zr2O12 had a higher Li-ion conductivity compared to the more commonly Al-substituted Li7La3Zr2O12.