CATHODE MATERIAL FOR LITHIUM ION BATTERIES BASED ON MODIFIED PHOSPHATES Russian patent published in 2015 - IPC C01B25/30 H01M4/58 

FIELD: chemistry.

SUBSTANCE: invention relates to an active material based on carbon-coated lithiated vanadium phosphate for use in the positive active mass of lithium ion batteries. Lithiated vanadium phosphate crystals are further modified with a Na⁺ cation on the lithium sublattice, one or more cations from a group comprising Mg²⁺, Al³⁺, Y³⁺ and La³⁺ on the vanadium sublattice, and with a F^- or Cl^- anion on the phosphate sublattice, and are a compound of formula Li_3-xNa_xV_2-yM_y(PO₄)_3-zHal_z/C, where M is one or more metals from a group comprising Mg, Al, Y, La; Hal = F, Cl; 0 < x ≤ 0.1; 0 < y ≤ 0.2; 0 < z ≤ 0.16.

EFFECT: obtaining an active material for use in the positive active mass of lithium ion batteries with high capacitance and power, as well as acceptable cycling stability.

3 dwg