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US 11,011,746 B2Granted
Composite cathode active material for lithium battery, cathode for lithium battery including the same, and lithium battery including the cathode
AssigneesSamsung Electronics Co., Ltd., Samsung SDI Co., Ltd.
InventorsKwangjin Park, Junho Park, Jaegu Yoon, Sukgi Hong
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Abstract
A composite cathode active material for a lithium battery including: a lithium composite oxide; and a coating layer including a metal oxide and a lithium fluoride, (LiF) wherein the coating layer is disposed on at least a portion of a surface of the lithium composite oxide.
Claims26
A composite cathode active material for a lithium battery comprising:
- a lithium composite oxide;
- a coating layer comprising a metal oxide and a lithium fluoride, wherein the coating layer is disposed on at least a portion of a surface of the lithium composite oxide;
- and
- a spinel phase between the lithium composite oxide and the coating layer,
- wherein a total amount of the metal oxide and the lithium fluoride is in a range of about 3 parts by weight to about 10 parts by weight, based on 100 parts by weight of the composite cathode active material,
- wherein the lithium composite oxide is a layered oxide,
- wherein a mole ratio of the metal oxide to the lithium fluoride in the coating layer is in a range of about 1:1.5 to about 1.2, and
- wherein the coating layer is in the form of a continuous layer.
5 more elements
A method of preparing a composite cathode active material for a lithium battery, the method comprising:
- mixing a metal oxide precursor, a lithium composite oxide, a fluoride precursor, and a solvent to prepare a reaction product;
- drying the reaction product;
- and
- heat-treating the dried reaction product to prepare the composite cathode active material,
- wherein the composite cathode active material comprises
- a lithium composite oxide,
- a coating layer comprising a metal oxide and a lithium fluoride, wherein the coating layer is disposed on at least a portion of a surface of the lithium composite oxide, and
- a spinel phase between the lithium composite oxide and the coating layer,
- wherein a total amount of the metal oxide and the lithium fluoride is in a range of about 3 parts by weight to about 10 parts by weight, based on 100 parts by weight of the composite cathode active material,
- wherein a mole ratio of the metal oxide to the lithium fluoride is in a range of about 1:1.5 to 1:2, and
- wherein the coating layer is in the form of a continuous layer.
8 more elements
A composite cathode active material for a lithium battery comprising:
- a lithium composite oxide;
- a coating layer comprising a metal oxide and a lithium fluoride, wherein the coating layer is disposed on at least a portion of a surface of the lithium composite oxide, and
- a spinel phase between the lithium composite oxide and the coating layer,
- wherein a total amount of the metal oxide and the lithium fluoride is in a range of about 3 parts by weight to about 10 parts by weight, based on 100 parts by weight of the composite cathode active material,
- wherein the lithium composite oxide is a layered oxide,
- wherein a mole ratio of the metal oxide to the lithium fluoride in the coating layer is in a range of about 1:1.5 to about 1:1.15, and
- wherein the coating layer is in the form of a continuous layer.
4 more elements
Dependencies are inferred from the claim text.