ADDITIVE TO AN ACTIVE CATHODE MATERIAL FOR LITHIUM-ION BATTERIES, A METHOD FOR ITS PREPARATION AND AN ACTIVE CATHODE COMPOSITE MATERIAL COMPRISING AN ADDITIVE Russian patent published in 2023 - IPC H01M4/505 H01M10/525 

FIELD: electrical industry.

SUBSTANCE: invention can be used to produce a positive electrode (cathode) material based on layered transition metal oxides for lithium-ion batteries. The use of an additive to an active cathode material for lithium-ion batteries, which acts as a void filler between particles of the main active cathode material, is an active cathode material of the general formula Li_aNi_xMn_yCo_zA_vO₂, where 0.9≤а≤1.3, 0≤х≤1, 0≤у≤1, 0≤z≤1, v≤0.1, x+y+z+v=1, А is an alloying additive, comprising at least one element selected from the group: Al, Mg, Zr, W, Ti, Cr, V, Ca, Zn, Ga, Sr, Mo, Ru, In, Sc. The method for producing precursor compounds of an additive to an active cathode material includes exposing the reaction mixture to microwave radiation. The method allows to reduce the synthesis time.

EFFECT: to improve the operational characteristics of the active cathode material for lithium-ion batteries, namely, to increase the tap density while maintaining high specific capacity at different charge/discharge rates, and, accordingly, to increase the volumetric energy density.

14 cl, 7 dwg, 1 tbl, 3 ex