METHOD FOR PRODUCING LiLaZrO SOLID ELECTROLYTE DOPED WITH ALUMINUM Russian patent published in 2019 - IPC H01G9/25 H01M10/562 

FIELD: technological processes.

SUBSTANCE: invention relates to methods for producing ceramic solid electrolytes with high conductivity on lithium ion and can be used in the electrical industry, in particular, in the manufacture of solid-phase lithium-ion batteries to power portable electronics. Mix in stoichiometry powders of zirconyl nitrate and lanthanum nitrate, as well as a powder of lithium carbonate taken with a 15–20 % excess. When mixing the batch components add a powder of aluminum nitrate in the amount of 0.6–0.7 wt.% in terms of aluminum. Mixture is subjected to heat treatment at a temperature of 850–900 °C for 2–4 hours to form a powdered precursor. Then press the tablets that are sintered at a temperature of 1,050–1,150 °C for 8–10 hours.

EFFECT: invention allows at low energy consumption and duration to synthesize a monophasic solid electrolyte of Li_6.4La₃Al_0.2Zr₂O₁₂ composition with a garnet structure of a cubic modification with a high (up to 2,3⋅10^-4 S/cm) ionic conductivity.

1 cl, 3 ex