Patent ID: 11866338
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC C

Claim 0:
1. A negative electrode active material for a secondary battery comprising:
natural graphite particles,
wherein the natural graphite particles are surface modified,
wherein the natural graphite particles are spherical,
wherein a particle size distribution value of the natural graphite particles, Dmax/Dmin, is 1.8 to 2.0, and
wherein pores having a diameter of 0.5 μm to 2.0 μm are formed on a surface of the natural graphite particles,
wherein the pores are fomred inside the natural graphite particles, and
wherein the pores formed inside the natural graphite particles comprise 5 vol % to 15 vol % having a diamter of 6 nm or less, and 60 vol % to 80 vol % having a diameter between 60 nm and 200 nm.