METHOD FOR PREPARING ACTIVE MASS OF NEGATIVE ELECTRODE OF LITHIUM-ION BATTERY Russian patent published in 2023 - IPC H01M4/1391 H01M10/525 

FIELD: lithium-ion batteries.

SUBSTANCE: methods for obtaining a negative electrode of lithium-ion batteries (LIB) used in the production of LIB. The method consists in drying the conductive carbon black Super R, composite artificial graphite and sodium carboxymethyl cellulose at a temperature of 80-120°C for 5 hours, mixing in a vacuum mixer for 30 minutes at a speed of 30 rpm with grinding at a speed of 500 rpm, then add distilled water in a proportion of 80-85% of its total amount, mix in a vacuum mixer for 30 min at a speed of 50 rpm with grinding at a speed of 1700 rpm, mixing is continued at a speed of 65 rpm with grinding at 2250 rpm in a vacuum mixer for 2 hours at a vacuum pressure of 0.08-0.1 MPa, then the remaining amount of water is added and mixed at a speed of 65 rpm with grinding at 2250 rpm in a vacuum mixer for 30 minutes, after which an anionic polymer dispersion of styrene-butadiene rubber is added to the resulting mixture and mixed for 30 minutes at a speed of 30 rpm with grinding 500 rpm in a vacuum mixer, then the resulting mass is passed through a nickel mesh with a mesh size of 0.080 mm.

EFFECT: reducing the preparation time of the active material, which affects productivity.

1 cl, 1 ex