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US 2019/0296324 A1Published application
Positive active material for rechargeable lithium battery, method of preparing the same, electrode including the same, and rechargeable lithium battery including the electrode
AssigneeUnist (Ulsan National Institute of Science and Technology)
InventorsJaephil Cho, Jun Hyeok Kim, Hyun Su Ma
Life of this patent
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Abstract
Provided is a monocrystalline cathode active material for a lithium secondary battery, the monocrystalline cathode active material being represented by the Formula of LixPyNi1-a-bCOaAbO2.
Claims20
A cathode active material for a lithium secondary battery, the cathode active material being monocrystalline and represented by Formula 1:
- LixPyNi1-a-bCoaAbO2 <Formula 1>
- wherein, in Formula 1, 0.98≤x≤1.02, 0≤y≤0.007, 0<a≤0.2, 0≤b≤0.3, and A is at least one element selected from Mn, Al, Mg, and V.
A method of preparing a cathode active material for a lithium secondary battery, the method comprising:
- preparing a premixture of a lithium source and a transition metal source;
- mixing the premixture under an oxidizing atmosphere to thereby obtain a lithium transition metal-containing mixture;
- and
- thermally treating the lithium transition metal-containing mixture to thereby obtain a monocrystalline lithium transition metal composite oxide.
1 more element
Dependencies are inferred from the claim text.