Patent ID: 11881584
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 5:
6. A method for preparing a negative electrode active material, the method comprising steps of:
pressurizing natural graphite by a cold isostatic press method; and
adjusting the D90/D10 of the pressurized natural graphite, which is the ratio of D90 to D10, to be 2.20 or less and adjusting the D50 of the pressurized natural graphite to be 6 μm to 11 μm,
wherein the BET specific surface area of the natural graphite having the adjusted D90/D10 and D50 is 2.2 m2/g or less.