Cathode active material for lithium secondary battery and lithium secondary battery including the same
AssigneeSK On Co., Ltd.
InventorsSoo Ho Kim, Min Gu Kang, Min Suk Kang
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Abstract
A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium composite oxide particle that contains lithium and transition metals including an excess amount of nickel. The lithium composite oxide particle satisfies a predetermined XRD peak area relation. A lithium secondary battery using the cathode active material and providing improved stability and durability is provided.
Claims17
A cathode active material for a lithium secondary battery comprising a lithium composite oxide particle that contains lithium and transition metals including nickel, wherein nickel is included in the largest molar ratio of the transition metals,
- wherein the lithium composite oxide particle satisfies Equation 2:
- 7.
- ≤
- A
-
- (
- 104
- )
- /
- A
-
- (
- 105
- )
- [
- Equation
-
- 2
- ]
- wherein, in Equation 2, A(104) is the area of the peak corresponding to the (104) plane in the XRD analysis graph, A(105) is an area of a peak corresponding to a (105) plane in the XRD analysis graph, and A(104) and A(105) are calculated as an integral value of each peak.
Dependencies are inferred from the claim text.