METHOD OF PRODUCING NANOCOMPOSITE POWDER CATHODE MATERIALS FOR LITHIUM-ION BATTERIES Russian patent published in 2017 - IPC H01M4/04 H01M4/131 H01M10/525 

FIELD: electricity.

SUBSTANCE: choose a nano-sized powder of the cathode material based on compound Li₂MeSiO₄, or Li₂Me₁SiO₄, or LiMe₁PO₄, or LiMe₁O₂, where Me₁ - transition metals, for example Fe, Co, Ni, Mn, after which a coating is applied on the powder surface, the coating is based on the system of Li_x(Me₂)_yO, where Me₂ - Sc, V, Ge, Nb, Mo, La, Ta, Ti, 5-7 nm thick, then produce a heat treatment of the coated powders at a temperature of 300-500°C for 10-12 hours. The heat-treated powder is coated with a passivation coating based on Al₂O₃, coating thickness is 1-3 nm, using reagent (TMA) and water vapor.

EFFECT: invention makes it possible to increase lithium-ion conductivity and resistance to the action of an aggressive electrolyte environment of a lithium-ion battery.

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