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US 2026/0237656 A1Published application
Positive active material for a rechargeable lithium battery, method of preparing the same, and rechargeable lithium battery
AssigneeSamsung SDI Co., Ltd.
InventorPilsang YUN
Life of this patent
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Abstract
A positive active material fora rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The positive active material includes a secondary particle in which a plurality of primary particles is aggregated and at least a portion of the primary particles is arranged radially, and includes a first boron coating portion on a surface of the secondary particle, and a second boron coating portion on a surface of the primary particles inside the secondary particle.
Claims20
A positive active material for a rechargeable lithium battery, the positive active material comprising:
- a lithium nickel-based composite oxide, wherein the positive active material comprises a secondary particle in which a plurality of primary particles is aggregated, and at least a portion of the primary particles is arranged radially;
- a first boron coating portion on a surface of the secondary particle;
- and
- a second boron coating portion on a surface of the primary particles in an interior of the secondary particle,
- wherein an average length of the primary particles is about 200 nm to about 500 nm.
2 more elements
Dependencies are inferred from the claim text.