Positive electrode active material for non-aqueous electrolyte secondary batteries
US-2018131006-A1 · May 10, 2018 · US
Positive electrode active material for secondary battery, method of preparing the same, and lithium secondary battery including the positive electrode active material
US11440807B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11440807-B2 |
| Application number | US-201816757214-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 17, 2018 |
| Priority date | Nov 16, 2017 |
| Publication date | Sep 13, 2022 |
| Grant date | Sep 13, 2022 |
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Abstract
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A method of preparing a positive electrode active material for a secondary battery is provided, which includes preparing a lithium composite transition metal oxide, and mixing the lithium composite transition metal oxide and a metal borate compound and performing a heat treatment to form a coating portion on surfaces of particles of the lithium composite transition metal oxide. The positive electrode active material prepared includes lithium composite transition metal oxide particles, and a coating portion formed on surfaces of the lithium composite transition metal oxide particles, wherein the coating portion includes lithium (Li)-metal borate.
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 lithium composite transition metal oxide; and mixing the lithium composite transition metal oxide and a metal borate compound and performing a heat treatment to form a coating portion comprising a lithium (Li)-metal borate on surfaces of particles of the lithium composite transition metal oxide, wherein the lithium composite transition metal oxide provides the source of Li for the Li-metal borate. 2. The method of claim 1 , wherein the metal borate compound is a borate compound including at least one metal ion selected from the group consisting of zinc (Zn), zirconium (Zr), tungsten (W), magnesium (Mg), tin (Sn), aluminum (Al), barium (Ba), titanium (Ti), and vanadium (V). 3. The method of claim 1 , wherein the metal borate compound is a Zn-borate compound. 4. The method of claim 1 , wherein the lithium composite transition metal oxide comprises nickel (Ni), cobalt (Co) and at least one selected from the group consisting of manganese (Mn) and aluminum (Al), wherein an amount of nickel (Ni) in a total amount of transition metals in the lithium composite transition metal oxide is 60 mol % or more. 5. The method of claim 4 , wherein the amount of the nickel (Ni) in the total amount of the transition metals in the lithium composite transition metal oxide is 80 mol % or more. 6. The method of claim 1 , further comprising a coating method using dry mixing, wherein after nanoparticles are formed by milling the metal borate compound the dry mixing is performed. 7. The method of claim 1 , wherein the lithium (Li)-metal borate is represented by Formula 1: Li a M 1+x1 B 2+y1 O 3+z1 [Formula 1] wherein, in Formula 1, M is at least one selected from the group consisting of Zn, Zr, W, Mg, Sn, Al, Ba, Ti, and V, and 0<a≤1.5, −0.8≤x1≤4, −1.8≤y1≤4, and −2≤z1≤10.
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Classifications
Li-accumulators · CPC title
Particles with a specific particle size distribution · CPC title
of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title
one phase coated with the other · CPC title
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
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- What does patent US11440807B2 cover?
- A method of preparing a positive electrode active material for a secondary battery is provided, which includes preparing a lithium composite transition metal oxide, and mixing the lithium composite transition metal oxide and a metal borate compound and performing a heat treatment to form a coating portion on surfaces of particles of the lithium composite transition metal oxide. The positive ele…
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification C01G53/50. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 13 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).