US 12,191,489 B2
Negative active material for rechargeable lithium battery and rechargeable lithium battery including same
Sunil Park, Yongin-si (KR); Narae Kim, Yongin-si (KR); Jaehou Nah, Yongin-si (KR); Joongho Moon, Yongin-si (KR); Hyun Soh, Yongin-si (KR); and Eunjoo Lee, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
Filed on Mar. 3, 2021, as Appl. No. 17/190,863.
Claims priority of application No. 10-2020-0026660 (KR), filed on Mar. 3, 2020.
Prior Publication US 2021/0280868 A1, Sep. 9, 2021
Int. Cl. H01M 4/583 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 10/0525 (2010.01); H01M 10/44 (2006.01)
CPC H01M 4/583 (2013.01) [H01M 4/0471 (2013.01); H01M 10/0525 (2013.01); H01M 10/44 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A negative active material for a rechargeable lithium battery, the negative active material comprising:
a secondary particle in which a plurality of primary particles are agglomerated, the plurality of primary particles comprising natural graphite, and the secondary particle comprising pores; and
an amorphous carbon filled in the pores,
wherein an area of the amorphous carbon is 10% to 30% based on a total area of 100% of the negative active material, in a cross-section through a center diameter of the secondary particle of the negative active material, and
wherein the natural graphite is flake graphite.