	US 11,866,338 B2
	Anode active material for secondary battery, anode comprising same, and method for manufacturing same
Hee Won Choi, Daejeon (KR); Je Young Kim, Daejeon (KR); Sang Wook Woo, Daejeon (KR); and Li Lin Piao, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/257,184
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jan. 17, 2020, PCT No. PCT/KR2020/000842 § 371(c)(1), (2) Date Dec. 30, 2020, PCT Pub. No. WO2020/149688, PCT Pub. Date Jul. 23, 2020.
Claims priority of application No. 10-2019-0006167 (KR), filed on Jan. 17, 2019.
Prior Publication US 2021/0122639 A1, Apr. 29, 2021
Int. Cl. C01B 32/205 (2017.01); C01B 32/21 (2017.01)

CPC C01B 32/205 (2017.08) [C01B 32/21 (2017.08); C01P 2004/32 (2013.01); C01P 2006/17 (2013.01)]

6 Claims

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, D_max/D_min, 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.