TITANIUM DIOXIDE WITH INTERCALATED LITHIUM, OBTAINED FROM IT PARTICLES OF LITHIUM TITANATE, AND CORRESPONDING METHODS Russian patent published in 2019 - IPC C01G23/00 H01M4/131 H01M4/485 B82B1/00 B82Y30/00 

FIELD: physics.

SUBSTANCE: invention can be used in production of anodes for lithium-ion batteries. Method of preparing lithium-containing particles suitable for use in an accumulator electrode involves forming a mixture containing particles of a titanium dioxide precursor and an aqueous solution of a lithium compound. Then this mixture is heated at high temperature in sealed pressure vessel to form titanium dioxide particles with embedded lithium. At least one particle size characteristic selected from a group consisting of average primary particle size, particle size distribution, mean size of intragranular pores, mean size of interparticle pores, pore size distribution and titanium dioxide particles shape is virtually unaffected by the heating stage. Titanium dioxide particles with embedded lithium are annealed to form lithium titanate spinel particles having monodispersed particle size distribution. Average size of the primary particles is within the range of approximately 10 % of the same particle size characteristic of the titanium dioxide precursor. Size of primary particles of titanium dioxide precursor is 40–60 nm.

EFFECT: invention improves characteristics of lithium-ion batteries due to control of dimensions and morphology of particles used in them.

22 cl, 8 dwg, 2 ex