US 12,438,182 B2
Negative electrode for lithium secondary battery, and method for manufacturing same
Jong Su Yoon, Daejeon (KR); Taek Soo Lee, Daejeon (KR); Jin Ho Cho, Daejeon (KR); Shin Wook Jeon, Daejeon (KR); and Young Gon Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 18/854,779
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Nov. 27, 2023, PCT No. PCT/KR2023/019192
§ 371(c)(1), (2) Date Oct. 7, 2024,
PCT Pub. No. WO2024/122955, PCT Pub. Date Jun. 13, 2024.
Claims priority of application No. 10-2022-0169280 (KR), filed on Dec. 7, 2022; and application No. 10-2023-0076626 (KR), filed on Jun. 15, 2023.
Prior Publication US 2025/0112264 A1, Apr. 3, 2025
Int. Cl. H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/583 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 10/0525 (2013.01) [H01M 4/0404 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/583 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A negative electrode for a lithium secondary battery, comprising:
a negative electrode current collector, and
a negative electrode active layer provided on at least one side of the negative electrode current collector and including a carbon-based negative electrode active material after activation and a silicon-based negative electrode active material,
wherein the negative electrode active layer has an alignment O.Ia of the carbon-based negative electrode active material after activation of 3 or less, and satisfies Equation 1:

OG Complex Work Unit Math
wherein, in Equation 1,
O.Ir represents the alignment of the carbon-based negative electrode active material measured prior to activation,
the activation is defined by charging and discharging the lithium secondary battery including the negative electrode at least two times at a rate of less than 1 C rate, and
the alignment of the carbon-based negative electrode active material prior to activation or after activation represents a ratio of area integrals of a peak at . . . analysis of the negative electrode active layer.