Cathode active material precursor, cathode active material formed therefrom, method of preparing the cathode active material, and cathode and lithium battery each including the cathode active material
US-2019074513-A1 · Mar 7, 2019 · US
Method of preparing positive electrode active material for secondary battery
US11508961B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11508961-B2 |
| Application number | US-201816762363-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 13, 2018 |
| Priority date | Nov 13, 2017 |
| Publication date | Nov 22, 2022 |
| Grant date | Nov 22, 2022 |
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Abstract
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A method of preparing a positive electrode active material for a secondary battery includes preparing a positive electrode active material precursor including nickel (Ni), cobalt (Co), and at least one selected from the group consisting of manganese (Mn) and aluminum (Al); and forming a lithium composite transition metal oxide by mixing the positive electrode active material precursor and a lithium source and performing calcination, wherein the positive electrode active material precursor includes nickel (Ni) in an amount of 60 mol % or more out of the entire metal element, and a molar ratio (Li/M) of lithium (Li) of the lithium source to the entire metal element (M) of the positive electrode active material precursor is greater than 1.1.
First claim
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The invention claimed is: 1. A method of preparing a positive electrode active material for a secondary battery, comprising: preparing a positive electrode active material precursor including nickel (Ni), cobalt (Co), and at least one selected from the group consisting of manganese (Mn) and aluminum (Al); and forming a lithium composite transition metal oxide by mixing the positive electrode active material precursor and a lithium source and performing calcination, wherein the positive electrode active material precursor includes nickel (Ni) in an amount of 60 mol % or more based on a total number of moles of metal elements, and a molar ratio (Li/M) of lithium (Li) of the lithium source to the metal element (M) of the positive electrode active material precursor is greater than 1.1, wherein the positive electrode active material precursor is represented by Chemical Formula 1 below: Ni 1−(x1+y1+z1) Co x1 M a y1 M b z1 (OH) 2 [Chemical Formula 1] wherein M a is at least one element selected from the group consisting of Mn and Al, M b is at least one element selected from the group consisting of Zr, W, Mg, Al, Ce, Hf, Ta, La, Ti, Sr, Ba, Nb, Mo, and Cr, and 0<x1≤0.4, 0<y1≤0.4, 0≤z1≤0.1, and 0<x1+y1+z1≤0.4. 2. The method of claim 1 , wherein the molar ratio (Li/M) is 1.105 to 1.30. 3. The method of claim 1 , wherein the molar ratio (Li/M) 1.13 to 1.20. 4. The method of claim 1 , wherein the positive electrode active material precursor includes nickel (Ni) in an amount of 80 mol % or more based on a total number of moles of metal elements. 5. The method of claim 1 , wherein the positive electrode active material precursor includes nickel (Ni), cobalt (Co), manganese (Mn), and aluminum (Al). 6. The method of claim 1 , wherein the calcination is carried out at a calcination temperature of 700 to 900° C. 7. The method of claim 1 , wherein the calcination is carried out while raising a temperature to a calcination temperature at a temperature elevation rate of 2 to 10° C./min. 8. The method of claim 1 , wherein the calcination is carried out under an oxygen atmosphere. 9. The method of claim 1 , further comprising, washing the lithium composite transition metal oxide after the formation of a lithium composite transition metal oxide.
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Classifications
of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title
- C01G53/44Primary
containing manganese · CPC title
Electric properties · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · 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 US11508961B2 cover?
- A method of preparing a positive electrode active material for a secondary battery includes preparing a positive electrode active material precursor including nickel (Ni), cobalt (Co), and at least one selected from the group consisting of manganese (Mn) and aluminum (Al); and forming a lithium composite transition metal oxide by mixing the positive electrode active material precursor and a lit…
- 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 C01G53/44. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 22 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).