US 12,191,492 B2
Anode for lithium secondary battery and lithium secondary battery including the same
So Hyun Park, Daejeon (KR); Kyung Hoon Kim, Daejeon (KR); and Chan Young Jeon, Daejeon (KR)
Assigned to SK On Co., Ltd., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Sep. 11, 2023, as Appl. No. 18/464,619.
Claims priority of application No. 10-2022-0122111 (KR), filed on Sep. 27, 2022.
Prior Publication US 2024/0105944 A1, Mar. 28, 2024
Int. Cl. H01M 4/587 (2010.01); H01M 4/02 (2006.01); H01M 4/133 (2010.01); H01M 4/36 (2006.01); H01M 10/052 (2010.01)
CPC H01M 4/587 (2013.01) [H01M 4/133 (2013.01); H01M 4/364 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An anode for a lithium secondary battery, comprising:
an anode current collector; and
an anode active material layer on at least one surface of the anode current collector, the anode active material layer comprising an anode active material that comprises a natural graphite and an artificial graphite, the artificial graphite having a form of single particles,
wherein an orientation index defined by Equation 1 is 15 or less:
Orientation Index=I(004)/I(110)   [Equation 1]
wherein, in Equation 1, I(004) is a peak intensity of a (004) plane of the anode active material layer measured by an X-ray diffraction (XRD) analysis, and I(110) is a peak intensity of a (110) plane of the anode active material layer measured by the XRD analysis, and
wherein an irregularity degree defined by Equation 2 of the artificial graphite is in a range from 1.7 to 2.2:
IrregularityDegree=Da/D50   [Equation 2]
where, in Equation 2, Da is a value (μm) obtained by dividing a circumference of the artificial graphite measured by a particle size analyzer by π, and D50 is a volume average particle diameter (μm) of the artificial graphite.