Electrode, nonaqueous electrolyte battery, battery pack and vehicle
US-2017077508-A1 · Mar 16, 2017 · US
Lithium cobalt-based positive electrode active material, preparation method thereof, positive electrode and secondary battery including the same
US11329286B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11329286-B2 |
| Application number | US-201816764912-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 10, 2018 |
| Priority date | Dec 8, 2017 |
| Publication date | May 10, 2022 |
| Grant date | May 10, 2022 |
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Abstract
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A lithium cobalt-based positive electrode active material is provide, which includes sodium and calcium, wherein the total amount of the sodium and calcium is 150 ppm to 500 ppm based on the total weight of the lithium cobalt-based positive electrode active material. A method for preparing the lithium cobalt-based positive electrode active material is also provided.
First claim
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The invention claimed is: 1. A lithium cobalt-based positive electrode active material comprising sodium and calcium, wherein a total amount of the sodium and calcium is 150 ppm to 500 ppm based on a total weight of the lithium cobalt-based positive electrode active material, and wherein the lithium cobalt-based positive electrode active material is represented by Formula 1 below: Li 1-x M 1 x Co 1-y M 2 y O 2 [Formula 11] wherein M 1 includes Na and Ca, the M 2 is one or more selected from the group consisting of Al, Mg, W, Mo, Zr, Ti, Fe, V, Cr, Ba, Ca, and Nb, and 0<x≤0.1 and 0≤y≤0.2. 2. The lithium cobalt-based positive electrode active material of claim 1 , wherein the sodium and calcium are included in lithium sites of the lithium cobalt-based positive electrode active material. 3. The lithium cobalt-based positive electrode active material of claim 1 , wherein the M 1 is substitute for a lithium site and the M 2 is substituted for a cobalt site. 4. A positive electrode comprising the positive electrode active material of claim 1 . 5. A lithium secondary battery comprising the positive electrode of claim 4 . 6. The lithium secondary battery of claim 5 , wherein a driving voltage of the lithium secondary battery is 4.45 V or higher. 7. A method for preparing a lithium cobalt-based positive electrode active material, comprising: preparing a mixture by mixing a cobalt precursor containing sodium and calcium in an amount of 600 ppm or less based on a total amount of the cobalt precursor with a lithium raw material; and firing the mixture to prepare a lithium cobalt-based positive electrode active material in which the total amount of sodium and calcium is 150 ppm to 500 ppm based on the total weight of the lithium cobalt-based positive electrode active material, wherein the lithium cobalt-based positive electrode active material is represented by Formula 1 below: Li 1-x M 1 x Co 1-y M 2 y O 2 [Formula 11] wherein M 1 includes Na and Ca, the M 2 is one or more selected from the group consisting of Al, Mg, W, Mo, Zr, Ti, Fe, V, Cr, Ba, Ca, and Nb, and 0<x≤0.1 and 0≤y≤0.2. 8. The method of claim 7 , further comprising measuring contents of sodium and calcium in the cobalt precursor before the preparing of the mixture. 9. The method of claim 7 , wherein the preparing the mixture further comprises mixing at least one of a sodium raw material and a calcium raw material. 10. The method of claim 9 , wherein the sodium raw material and the calcium raw material are mixed such that the total amount of sodium and calcium in a lithium cobalt-based positive electrode active material is 150 ppm to 500 ppm based on the total weight of the lithium cobalt-based positive electrode active material. 11. The method of claim 7 , wherein the sodium and calcium are in the amount of 50 ppm to 600 ppm.
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Classifications
Li-accumulators · CPC title
- C01G51/42Primary
containing alkali metals, e.g. LiCoO2 · CPC title
containing alkaline earth metals, e.g. SrCoO3 · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Energy storage using batteries · CPC title
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- What does patent US11329286B2 cover?
- A lithium cobalt-based positive electrode active material is provide, which includes sodium and calcium, wherein the total amount of the sodium and calcium is 150 ppm to 500 ppm based on the total weight of the lithium cobalt-based positive electrode active material. A method for preparing the lithium cobalt-based positive electrode active material is also provided.
- 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 C01G51/42. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 10 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).