Positive electrode active material and preparation method thereof, positive electrode plate, secondary battery, battery module, battery pack, and electric apparatus
US-2024429384-A1 · Dec 26, 2024 · US
Positive electrode active material for lithium ion secondary battery, positive electrode for lithium ion secondary battery, and lithium ion secondary battery using same
US2016285102A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016285102-A1 |
| Application number | US-201615076137-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 21, 2016 |
| Priority date | Mar 27, 2015 |
| Publication date | Sep 29, 2016 |
| Grant date | — |
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Abstract
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A positive electrode active material for lithium ion secondary battery includes: active material particles including one or more compounds including Li and a transition metal; and a coating layer coating at least a part of a surface of the active material particles. The coating layer includes at least one of graphene or multilayer graphene The coating layer has a Raman spectrum with a G band (a peak of 1530 cm −1 to 1630 cm −1 ), a D band (a peak of 1300 cm −1 to 1400 cm −1 ), and a 2D band (a peak of 2650 cm −1 to 2750 cm −1 ). At least the intensity of the 2D band normalized by the intensity of the G band (2D int /G int ) satisfies 0.05≦2D int /G int .
First claim
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What is claimed is: 1 . A positive electrode active material for lithium ion secondary battery, comprising: active material particles including one or more compounds including Li and a transition metal; and a coating layer coating at least a part of a surface of the active material particles, wherein the coating layer includes at least one of graphene or multilayer graphene, the coating layer has a Raman spectrum with a G band (a peak of 1530 cm −1 to 1630 cm −1 ), a D band (a peak of 1300 cm −1 to 1400 cm −1 ), and a 2D band (a peak of 2650 cm −1 to 2750 cm −1 ), and at least the intensity of the 2D band normalized by the intensity of the G band (2D int /G int ) satisfies 0.05≦2D int /G int . 2 . The positive electrode active material for lithium ion secondary battery according to claim 1 , wherein the intensity of the 2D band normalized by the intensity of the G band (2D int /G int ) satisfies 0.1≦2D int /G int . 3 . The positive electrode active material for lithium ion secondary battery according to claim 1 , wherein the intensity of the D band normalized by the intensity of the G band (2D int /G int ) satisfies 0.6≦D int /G int ≦1.2. 4 . The positive electrode active material for lithium ion secondary battery according to claim 2 , wherein the intensity of the D band normalized by the intensity of the G band (D int /G int ) satisfies 0.6≦D int /G int ≦1.2. 5 . A positive electrode for lithium ion secondary battery, comprising the positive electrode active material for lithium ion secondary battery according to claim 1 . 6 . A positive electrode for lithium ion secondary battery, comprising the positive electrode active material for lithium ion secondary battery according to claim 2 . 7 . A positive electrode for lithium ion secondary battery, the electrode comprising the positive electrode active material for lithium ion secondary battery according to claim 3 . 8 . A positive electrode for lithium ion secondary battery, comprising the positive electrode active material for lithium ion secondary battery according to claim 4 . 9 . A lithium ion secondary battery comprising: the positive electrode for lithium ion secondary battery according to claim 5 ; a negative electrode including a negative electrode active material; a separator disposed between the positive electrode and the negative electrode; and a nonaqueous electrolyte. 10 . A lithium ion secondary battery comprising: the positive electrode for lithium ion secondary battery according to claim 6 ; a negative electrode including a negative electrode active material; a separator disposed between the positive electrode and the negative electrode; and a nonaqueous electrolyte. 11 . A lithium ion secondary battery comprising: the positive electrode for lithium ion secondary battery according to claim 7 ; a negative electrode including a negative electrode active material; a separator disposed between the positive electrode and the negative electrode; and a nonaqueous electrolyte. 12 . A lithium ion secondary battery comprising: the positive electrode for lithium ion secondary battery according to claim 8 ; a negative electrode including a negative electrode active material; a separator disposed between the positive electrode and the negative electrode; and a nonaqueous electrolyte.
Assignees
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Classifications
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
Positive electrodes · CPC title
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
- H01M4/366Primary
as layered products · CPC title
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- What does patent US2016285102A1 cover?
- A positive electrode active material for lithium ion secondary battery includes: active material particles including one or more compounds including Li and a transition metal; and a coating layer coating at least a part of a surface of the active material particles. The coating layer includes at least one of graphene or multilayer graphene The coating layer has a Raman spectrum with a G band (a…
- Who is the assignee on this patent?
- Tdk Corp
- 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 Thu Sep 29 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).