METHOD OF PRODUCING POWDER OF SOLID ELECTROLYTE WITH HIGH CONDUCTIVITY ON LITHIUM ION Russian patent published in 2016 - IPC H01M10/56 

FIELD: ceramic industry.

SUBSTANCE: invention relates to methods of producing ceramic solid electrolytes with high conductivity in lithium ion conductivity and can be used in electrical engineering, mainly in production of solid-state lithium-ion batteries. One performs mixing of aqueous solutions of lithium nitrate, aluminium nitrate, ammonium phosphate and oxalate complex of germanium to form collective solution, wherein lithium, aluminium, germanium and phosphorus are in stoichiometric ratio corresponding composition L_1.5Al_0.5Ge_1.5(PO₄)₃. Oxalate complex of germanium is obtained by dissolving germanium oxide in 12-15 % water solution of oxalic acid until content of 20-40 g/l GeO₂. Collective solution is heated at temperature of 250-400 °C with removal of liquid phase. That is followed by thermal treatment of precursor at temperature 650-700 °C for 1-3 hours. Method enables more technologically effective synthesis of monophase powdered solid electrolyte composition of Li_1.5Al_0.5Ge_1.5(PO₄)₃ with high (up to 4.6·10^-4 Cm/cm) ionic conductivity.

EFFECT: method employs water-soluble components of precursor, has low power consumption and duration and is more environmentally friendly.

3 cl, 3 ex