Methods of preparing positive electrode active material precursor for lithium secondary battery and positive electrode active material
US-10892471-B2 · Jan 12, 2021 · US
Positive electrode active material, method of preparing the positive electrode active material, and positive electrode and lithium secondary battery which include the positive electrode active material
US12255327B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12255327-B2 |
| Application number | US-202017413100-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 7, 2020 |
| Priority date | Jan 7, 2019 |
| Publication date | Mar 18, 2025 |
| Grant date | Mar 18, 2025 |
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Abstract
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A positive electrode active material includes a nickel-based lithium transition metal oxide containing nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium, wherein cobalt is included in an amount of greater than 0 ppm to 6,000 ppm or less on a surface of the nickel-based lithium transition metal oxide. A method of preparing the positive electrode active material, a positive electrode for a lithium secondary battery and a lithium secondary battery which includes the positive electrode active material are also provided.
First claim
Opening claim text (preview).
The invention claimed is: 1. A positive electrode active material comprising: a nickel-based lithium transition metal oxide containing nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium; and a cobalt, wherein the cobalt is included in an amount of 2,000 ppm to 5,000 ppm relative to a total weight of the positive electrode active material, in a surface portion of the nickel-based lithium transition metal oxide, wherein the nickel-based lithium transition metal oxide is represented by Formula 1: Li 1+a [Ni x Mn y M 1 z ]O 2 [Formula 1] wherein, in Formula 1, M 1 is, 0≤a≤0.3, 0.60≤x<1, 0<y≤0.40, and 0≤z≤0.35, and wherein at least one of the nickel or manganese has a concentration gradient from a surface of a positive electrode active material particle, and wherein the amount of the nickel or the manganese is increased in a direction toward a center of the positive electrode active material particle. 2. The positive electrode active material of claim 1 , wherein the cobalt has a concentration gradient from the surface of a positive electrode active material particle, and wherein the amount of the cobalt is decreased in the direction toward the center of the positive electrode active material particle. 3. The positive electrode active material of claim 1 , wherein the cobalt is present within 2,000 nm from the surface of the positive electrode active material particle in the direction toward the center of the positive electrode active material particle. 4. A positive electrode comprising: a positive electrode collector, and a positive electrode active material layer formed on the positive electrode collector, wherein the positive electrode active material layer comprises the positive electrode active material of claim 1 . 5. A lithium secondary battery comprising the positive electrode of claim 4 .
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Classifications
Positive electrodes · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title
Electric properties · CPC title
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- What does patent US12255327B2 cover?
- A positive electrode active material includes a nickel-based lithium transition metal oxide containing nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium, wherein cobalt is included in an amount of greater than 0 ppm to 6,000 ppm or less on a surface of the nickel-based lithium transition metal oxide. A method of preparing the positive electrode…
- Who is the assignee on this patent?
- Lg Chemical Ltd, 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 Mar 18 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).