US 12,237,496 B2
Negative electrode for lithium secondary battery and lithium secondary battery comprising same
Jinhyon Lee, Yongin-si (KR); Hongjeong Kim, Yongin-si (KR); Hyeri Eom, Yongin-si (KR); Sangjun Lee, Yongin-si (KR); and Daeseop Lim, Yongin-si (KR)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Appl. No. 17/605,057
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
PCT Filed Apr. 16, 2020, PCT No. PCT/KR2020/005073
§ 371(c)(1), (2) Date Oct. 20, 2021,
PCT Pub. No. WO2020/218773, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 10-2019-0047927 (KR), filed on Apr. 24, 2019.
Prior Publication US 2022/0209217 A1, Jun. 30, 2022
Int. Cl. H01M 4/133 (2010.01); H01M 4/02 (2006.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/485 (2010.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/133 (2013.01) [H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/387 (2013.01); H01M 4/485 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A negative electrode for a lithium secondary battery, the negative electrode comprising:
a current collector; and
a negative electrode active material layer including:
a first layer formed on two opposing major sides of the current collector and comprising a first carbon-based negative electrode active material, and
a second layer formed on the first layer on the two opposing major sides of the current collector, the second layer and comprising a second carbon-based negative electrode active material,
wherein:
a DD (Degree of Divergence) value of the first layer is 30% to 90% of a DD value of the negative electrode active material layer and,
the DD value is defined by Equation 1:
DD(Degree of Divergence)=(Ia/Itotal)*100  [Equation 1]
In Equation 1,
Ia is a sum of peak intensities at non-planar angles measured by XRD using a CuKα ray, and
Itotal is a sum of peak intensities at all angles measured by XRD using a CuKα ray.