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US 2019/0296349 A1Published application
Cathode active material for lithium ion secondary batteries, method for manufacturing the same, and lithium ion secondary batteries including the same
AssigneeUnist (Ulsan National Institute of Science and Technology)
InventorsJaephil Cho, Moon Su Yoon
Life of this patent
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Abstract
Provided is a composite cathode active material including: a core including a lithium transition metal oxide, the lithium transition metal oxide being doped with nickel (Ni) and at least one element selected from Group 4 to Group 13 elements and having a layered crystalline phase belonging to the Space Group R-3m; and a coating layer on a surface of the core, the coating layer including a cobalt compound.
Claims20
A composite cathode active material comprising:
- a core comprising a lithium transition metal oxide, wherein the lithium transition metal oxide is represented by Formula 1, is doped with nickel (Ni) and at least one element selected from Group 4 to Group 13 elements, and has a layered crystalline phase belonging to the Space Group R-3m;
- and
- a coating layer on a surface of the core, the coating layer comprising a cobalt compound:
- LixM1O2 <Formula 1>
- wherein, in Formula 1, 1.00≤x≤1.04, and
- M1 comprises cobalt (Co), nickel (Ni), and the at least one element selected from Group 4 to Group 13 elements.
3 more elements
A method of preparing a composite cathode active material, the method comprising:
- preparing a precursor compound of a lithium transition metal oxide represented by Formula 1;
- thermally treating the precursor compound to thereby obtain a core comprising the lithium transition metal oxide;
- forming, on a surface of the core, a coating layer comprising a cobalt oxide.
- LixM1O2 <Formula 1>
- wherein, in Formula 1, 1.00≤x≤1.04, and
- M1 comprises cobalt (Co), nickel (Ni), and at least one element selected from Group 4 to Group 13 elements.
3 more elements
Dependencies are inferred from the claim text.