Coating liquid for cathode active material, method for making the same, and method for coating cathode active material
US-2018309132-A1 · Oct 25, 2018 · US
Cathode active material for lithium secondary battery and method of manufacturing the same
US11502291B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11502291-B2 |
| Application number | US-201916692895-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 22, 2019 |
| Priority date | Nov 26, 2018 |
| Publication date | Nov 15, 2022 |
| Grant date | Nov 15, 2022 |
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- Title
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Abstract
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A cathode active material for a lithium secondary battery includes a lithium metal oxide particle, and an organic poly-phosphate or an organic poly-phosphonate formed on at least portion of a surface of the lithium metal oxide particle. Chemical stability of the lithium metal oxide particle may be improved and surface residues may be reduced by the organic poly-phosphate or the organic poly-phosphonate.
First claim
Opening claim text (preview).
What is claimed is: 1. A cathode active material for a lithium secondary battery, comprising: a lithium metal oxide particle; and an organic poly-phosphate forming a coating layer on at least a portion of the lithium metal oxide particle or an organic poly-phosphonate forming a coating layer on at least a portion of the lithium metal oxide particle, wherein an organic ligand bond or an organic metal complex bond is formed between the lithium metal oxide particle and the coating layer wherein the organic poly-phosphate is represented by Structural Formula 1 below, and the organic poly-phosphonate is represented by Structural Formula 2 below: wherein, in the Structural Formulae 1 and 2 above, m is an integer from 2 to 20, and R 1 represents an unsubstituted C 1 -C 10 hydrocarbon group, and wherein the lithium metal oxide particle includes a nickel-based lithium oxide represented by General Formula 1 below: Li x Ni y M 1-y O 2 [General Formula 1] wherein, in the General Formula 1 above, 0.95≤x≤1.08, 0.5≤y≤0.93, and M is at least one element selected from a group consisting of Co, Mn, Al, Zr, Ti, B, Mg and Ba. 2. The cathode active material for a lithium secondary battery according to claim 1 , wherein the organic poly-phosphate compound or the organic poly-phosphonate compound includes at least one of compounds represented by Chemical Formulae 1 to 3 below: 3. The cathode active material for a lithium secondary battery according to claim 1 , wherein, in the General Formula 1, 0.8≤y≤0.93. 4. The cathode active material for a lithium secondary battery according to claim 1 , wherein, in the General Formula 1, M includes Co and Mn. 5. A lithium secondary battery, comprising: a cathode including a lithium metal oxide particle and an organic poly-phosphate forming a coating layer on at least a portion of the lithium metal oxide particle or an organic poly-phosphonate forming a coating layer on at least a portion of the lithium metal oxide particle, wherein an organic ligand bond or an organic metal complex bond is formed between the lithium metal oxide particle and the coating layer an anode; and a separation layer interposed between the cathode and the anode, wherein the organic poly-phosphate is represented by Structural Formula 1 below, and the organic poly-phosphonate is represented by Structural Formula 2 below: wherein, in the Structural Formulae 1 and 2 above, m is an integer from 2 to 20, and R 1 represents an unsubstituted C 1 -C 10 hydrocarbon group, and wherein the lithium metal oxide particle includes a nickel-based lithium oxide represented by General Formula 1 below: Li x Ni y M 1-y O 2 [General Formula 1] wherein, in the General Formula 1 above, 0.95≤x≤1.08, 0.5≤y≤0.93, and M is at least one element selected from a group consisting of Co, Mn, Al, Zr, Ti, B, Mg and Ba.
Assignees
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Classifications
Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title
Positive electrodes · CPC title
being polymers · CPC title
- H01M4/366Primary
as layered products · CPC title
of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
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- What does patent US11502291B2 cover?
- A cathode active material for a lithium secondary battery includes a lithium metal oxide particle, and an organic poly-phosphate or an organic poly-phosphonate formed on at least portion of a surface of the lithium metal oxide particle. Chemical stability of the lithium metal oxide particle may be improved and surface residues may be reduced by the organic poly-phosphate or the organic poly-pho…
- Who is the assignee on this patent?
- Sk Innovation Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/366. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 15 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).