Preparation of Li4GeO4-Li3VO4 based electrolytes via mechanochemical treatment

Pseudo-binary electrolytes of (100 -x)Li4GeO4 center dot xLi3VO4 (x = 0, 10, 20, 30, 40, and 50 mol %) and pseudo -ternary electrolytes of 45Li4GeO4 center dot 45Li3VO4 center dot 10LiaMOb (M = B, Si, P, S, Mo, and W) with lithium superionic conductor (LISICON) type structures were prepared by mechanochemical treatment and subsequent heat treat-ment. For the (100 -x)Li4GeO4 center dot xLi3VO4 heated samples with LISICON-type structure, the activation energy decreased with increasing Li3VO4 content, and the x = 50 sample showed a high conductivity of 1.1 (c) 10-4 S cm -1 at 25 degrees C. The 45Li4GeO4 center dot 45Li3VO4 center dot 10LiaMOb heated samples with LISICON-type structure showed a conductivity of approximately 10-5S cm -1 at 25 degrees C, and the larger "a" as the Li content in Lia(Ge0.45M0.1V0.45)Ob contributed to improving the ionic conduction properties of this system.(c) 2023 The Ceramic Society of Japan. All rights reserved.