OBTAINING NANOSTRUCTURED MIXED LITHIUM AND ZIRCONIUM OXIDES BY SPRAY PYROLYSIS Russian patent published in 2024 - IPC C01B13/18 C01D1/02 C01G25/02 H01M4/131 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: mixed lithium and zirconium oxide is obtained by flame spray pyrolysis using at least one metal precursor solution containing lithium and zirconium carboxylates containing 5–20 carbon atoms, and a solvent containing less than 5 wt.% of water and selected from alcohol, ether, ester, carboxylic acids, optionally halogenated hydrocarbon and mixtures thereof. Metal precursor solution can also contain a chelating agent selected from diamines and 1,3-dicarbonyl compounds. At least one solution of said metal precursors is sprayed by spraying gas. Obtained aerosol is introduced into the reaction space of the reactor, where it reacts with a flame obtained by igniting a mixture of combustible and oxygen-containing gases. Reaction stream is then cooled to remove a solid product representing a mixed oxide of general formula Li_aZrbO_0.5a+2b, where 0.5 ≤ a ≤ 12; 1.0 ≤ b ≤ 4.0. After the spray pyrolysis step in the flame, heat treatment can be additionally carried out at 500–1200 °C. Obtained mixed lithium and zirconium oxide is in the form of aggregated primary particles, characterized by a BET surface area of 15–50 m²/g or less than 20 m²/g, number-average particle diameter d₅₀ = 0.05–1 mcm or d₅₀ = 1–50 mcm, determined by static light scattering (SLS) and tamping density of 50–200 g/l or 200–800 g/l.

EFFECT: invention can be used in making coatings or alloying materials for electrodes of lithium storage batteries, as well as additives to liquid, gel-like or solid-state electrolytes of lithium-ion storage batteries.

10 cl, 5 dwg, 2 tbl, 3 ex