- ALUMINUM-GALIUM DOPED SOLID ELECTROLYTE MATERIAL FOR ALL-SOLID-STATE LITHIUM SECONDARY BATTERY AND METHOD FOR PREPARING THE SAME

摘要

The present invention relates to an LLZO solid electrolyte doped with aluminum (Al) and gallium (Ga) represented by Chemical Formula 1, and a method for manufacturing the same. The solid electrolyte of the present invention and its manufacturing method control the aluminum content, gallium content and lithium content of the starting material and control the feed rate of the raw material, thereby forming a high-precision cubic structure and improving the sintering properties to improve the ion conductivity of the solid electrolyte. It has the effect of improving. [Formula 1] Li _x Al _y Ga _z La _w Zr _u O ₁₂ (5≤x≤9, 0 y≤4, 0 z≤4, 2≤w≤4, 1≤u≤3)