US 11,881,584 B2
Negative electrode active material, preparation method thereof, negative electrode and secondary battery both including same
Li Lin Piao, Daejeon (KR); Je Young Kim, Daejeon (KR); and Sang Wook Woo, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/293,950
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Apr. 2, 2020, PCT No. PCT/KR2020/004521
§ 371(c)(1), (2) Date May 14, 2021,
PCT Pub. No. WO2020/204631, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 10-2019-0038618 (KR), filed on Apr. 2, 2019.
Prior Publication US 2022/0006087 A1, Jan. 6, 2022
Int. Cl. H01M 4/00 (2006.01); H01M 4/587 (2010.01); C01B 32/21 (2017.01); H01M 4/133 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/587 (2013.01) [C01B 32/21 (2017.08); H01M 4/133 (2013.01); H01M 10/0525 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2004/84 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/027 (2013.01)] 13 Claims
 
1. A negative electrode active material, comprising:
natural graphite,
wherein a D90/D10, which is the ratio of D90 to D10, is 2.20 or less;
wherein a D50 is 6 μm to 11 μm; and
wherein a BET specific surface area is 2.2 m2/g or less.