	US 12,294,087 B2
	Negative electrode active material for lithium secondary battery, and negative electrode for lithium secondary battery and lithium secondary battery including the same
Hee Won Choi, Daejeon (KR); Jae Wook Lee, Daejeon (KR); Eun Kyung Kim, Daejeon (KR); Seung Youn Choi, Daejeon (KR); and Je Young Kim, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 16/960,265
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Feb. 22, 2019, PCT No. PCT/KR2019/002237 § 371(c)(1), (2) Date Jul. 6, 2020, PCT Pub. No. WO2019/164347, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 10-2018-0023181 (KR), filed on Feb. 26, 2018.
Prior Publication US 2021/0075016 A1, Mar. 11, 2021
Int. Cl. H01M 4/587 (2010.01); H01M 4/02 (2006.01); H01M 4/133 (2010.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01)

CPC H01M 4/587 (2013.01) [H01M 4/133 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)]

10 Claims

1. A negative electrode active material for a lithium secondary battery, comprising:

first negative electrode active material particles comprising artificial graphite particles and a carbon coating layer formed on the artificial graphite particles; and

second negative electrode active material particles comprising natural graphite particles,

wherein the first negative electrode active material particles have a BET specific surface area ranging from 0.5 m²/g to 3 m²/g,

wherein the second negative electrode active material particles have a BET specific surface area ranging from 1.5 m²/g to 2.5 m²/g,

wherein the first negative electrode active material particles have a larger average particle diameter (D₅₀) than an average particle diameter (D₅₀) of the second negative electrode active material particles,

a weight ratio of the first negative electrode active material particles to the second negative electrode active material particles is in a range of 70:30 to 95:5,

wherein the first negative electrode active material particles have a spherical shape,

wherein the second negative electrode active material particles have a spherical shape, and

wherein the second negative electrode active material particles have an average particle diameter (D₅₀) of 8 μm to 11 μm.