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US 12,191,492 B2Granted
Anode for lithium secondary battery and lithium secondary battery including the same
AssigneeSK On Co., Ltd.
InventorsSo Hyun Park, Kyung Hoon Kim, Chan Young Jeon
Life of this patent
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Abstract
An anode active material for a secondary battery according to an embodiment of the present disclosure includes 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 includes an anode active material that includes a natural graphite and an artificial graphite. The artificial graphite has a form of single particles. An orientation index expressed as I(004)/I(110) is 15 or less.
Claims9
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.
6 more elements
Dependencies are inferred from the claim text.