LITHIUM BATTERY CATHODE ACTIVE MASS MANUFACTURING METHOD Russian patent published in 2024 - IPC H01M4/04 H01M4/131 H01M10/52 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering, namely, to a method of manufacturing an active mass of a lithium battery cathode and can be used in production of lithium batteries with lithium nickelate cathodes. In the proposed method, after mixing nickel oxide with lithium hydroxide in dry form, mechanical activation of the obtained mixture is carried out in the process of plastic flow, with torsion under pressure of about 2.2 GPa and relative deformation values of 24–26, with subsequent heat treatment of the mixture in an oxygen atmosphere at temperature of 700 °C for 5 hours. Selection of the range of relative deformation of the mixture (NiO + LiOH) from 24 to 26 units and heat treatment mode enables to obtain phase-homogeneous and finely dispersed structures of LiNiO₂, in which the diffusion coefficient of the lithium ion on the solid phase of the cathode is increased, which contributes to an increase in the discharge capacity of the active mass.

EFFECT: increased capacity and service life of cathodes based on lithium nickelate.

1 cl, 1 dwg, 5 ex