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US 2018/0123130 A1Published application
Positive active material for rechargeable lithium battery, method of preparing the same, and rechargeable lithium battery including the same
AssigneeSamsung SDI Co., Ltd.
InventorsDongjin KIM, Minhan KIM, Dohyung PARK, Young Jin PARK, Kyounghyun KIM, Ilseok KIM
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Abstract
A positive active material for a rechargeable lithium battery includes a lithium nickel-based metal oxide represented by LixNi1-yMyO2 and a lithium-containing oxide on a surface of the lithium nickel-based metal oxide. In the formula LixNi1-yMyO2, M is one or more of Co, Mn, Al, Mg, Ti, Zr, or a combination thereof, 0<x<1.1, and 0≤y<0.5.
Claims16
A positive active material for a rechargeable lithium battery, the positive active material comprising:
- a lithium nickel-based metal oxide represented by Chemical Formula 1 and a lithium-containing oxide on a surface of the lithium nickel-based metal oxide:
- LixNi1-yMyO2 (1)
- where M is one or more of Co, Mn, Al, Mg, Ti, Zr, or a combination thereof and where 0<x<1.1 and 0≤y<0.5.
A method of preparing a positive active material for a rechargeable lithium battery, the method comprising:
- mixing a lithium raw material and a nickel-containing metal oxide precursor to prepare a mixture, heat-treating the mixture to prepare a lithium nickel-based metal oxide represented by Chemical Formula 1,
- LixNi1-yMyO2 (1)
- where M is one or more of Co, Mn, Al, Mg, Ti, Zr, or a combination thereof and where 0<x<1.1 and 0≤y<0.5, and
- dry-mixing the lithium nickel-based metal oxide with a lithium-containing oxide followed by heat treatment.
1 more element
Dependencies are inferred from the claim text.