	US 12,132,194 B2
	Negative active material for rechargeable lithium battery and rechargeable lithium battery including same
Ji Woo Ahn, Yongin-si (KR); Dongwoo Kim, Yongin-si (KR); Jaehou Nah, Yongin-si (KR); Bumjin Chang, Yongin-si (KR); Yurim Cha, Yongin-si (KR); Yeonjoo Choi, Yongin-si (KR); and Ilyoung Choi, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
Filed on May 31, 2023, as Appl. No. 18/326,895.
Application 18/326,895 is a continuation of application No. 16/312,972, granted, now 11,705,552, previously published as PCT/KR2017/007348, filed on Jul. 10, 2017.
Claims priority of application No. 10-2016-0088888 (KR), filed on Jul. 13, 2016.
Prior Publication US 2023/0307607 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/133 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/587 (2010.01)

CPC H01M 4/133 (2013.01) [H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/387 (2013.01); H01M 4/587 (2013.01)]

12 Claims

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

a plurality of primary particles of a crystalline carbon-based material and a secondary particle, the secondary particle comprising a mixture of both an assembly of the primary particles and a binder pitch, and the binder pitch being coal pitch and/or petroleum pitch,

wherein a ratio of an average particle diameter (D50) of the secondary particle relative to an average particle diameter (D50) of the primary particle ranges from about 1.5 to about 5,

an aspect ratio of the primary particle ranges from about 1 to about 5, and

wherein in an X-ray diffraction pattern of the negative active material, I₍₀₀₂₎/I₍₁₁₀₎that is a ratio of X-ray diffraction intensities at a (002) plane and a (110) plane ranges from about 50 to about 270, and

the I₍₀₀₂₎/I₍₁₁₀₎and a pellet density of the negative active material have a relationship of Equation 1:

29≤[(I₍₀₀₂₎/I₍₁₁₀₎)/pellet density (cc/g)]≤140. [Equation 1]