Cathode and lithium air battery including the same, and method of preparing the cathode
US-2018090802-A1 · Mar 29, 2018 · US
Method for producing positive electrode active material for lithium secondary battery and positive electrode active material for lithium secondary battery produced thereby
US12401021B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12401021-B2 |
| Application number | US-202017762234-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 13, 2020 |
| Priority date | Oct 14, 2019 |
| Publication date | Aug 26, 2025 |
| Grant date | Aug 26, 2025 |
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- Title
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Abstract
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A method for producing a positive electrode active material includes preparing a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, mixing the lithium transition metal oxide and a carbon-based material of a hollow structure having a plurality of pores to form a mixture, and surface treating the mixture in a mechanical manner to form a carbon coating layer on the surface of the lithium transition metal oxide, wherein the carbon-based material of a hollow structure having a plurality of pores has a specific surface area of 200 m2/g or greater and a graphitization degree(ID/IG) of 0.5 or greater.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a positive electrode active material, the method comprising: preparing a lithium transition metal oxide in a form of a secondary particle in which primary particles are aggregated; mixing the lithium transition metal oxide and a carbon-based material of a hollow structure having a plurality of pores to form a mixture; and surface treating the mixture in a mechanical manner to make the structure of the carbon-based material collapse and form a carbon coating layer on the surface of the lithium transition metal oxide, wherein the carbon-based material of a hollow structure having a plurality of pores has a specific surface area of 200 m 2 /g or greater and a graphitization degree (ID/IG) of 0.5 or greater. 2. The method of claim 1 , wherein the carbon-based material is mixed in an amount of from 0.1 to 2 parts by weight based on 100 parts by weight of the lithium transition metal oxide. 3. The method of claim 1 , wherein the surface treating of the mixture in a mechanical manner is performed by a mechanofusion method. 4. The method of claim 1 , wherein the carbon-based material has a specific surface area of from 200 m 2 /g to less than 500 m 2 /g. 5. The method of claim 1 , wherein the carbon-based material has a graphitization degree (I D /I G ) of from 0.5 to 2.0.
Assignees
Inventors
Classifications
Positive electrodes · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Carbon or graphite · CPC title
- H01M4/525Primary
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
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- What does patent US12401021B2 cover?
- A method for producing a positive electrode active material includes preparing a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, mixing the lithium transition metal oxide and a carbon-based material of a hollow structure having a plurality of pores to form a mixture, and surface treating the mixture in a mechanical manner to form a c…
- Who is the assignee on this patent?
- Lg Energy Solution Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/525. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 26 2025 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).