Effect of lithium salts on room temperature ionic conductivity of W, Y and Al co-doped Li7La3Zr2O12 solid electrolyte

Abstract

Li5.76La3Zr1.59W0.35Y0.06Al0.2O12 (W, Y, Al-LLZO) solid electrolyte was prepared using the solid-state reaction method. Effect of lithium salts (LiOH, LiNO3, Li2CO3, Li2C2O2) on the crystal structure, morphology, relative density and shrinkage, total ionic conductivity of the prepared solid electrolyte were studied, respectively. W, Y, Al-LLZO solid electrolytes of preparation with LiOH, LiNO3, Li2CO3 and Li2C2O2 respectively are cubic phases at room temperature. The high the total ionic conductivity of 2.56×10−4 S·cm−1 at 25 °C is achieved in W, Y, Al-LLZO solid electrolyte of preparation with Li2CO3.