Positive electrode active material particle and method for manufacturing positive electrode active material particle
US-2018145368-A1 · May 24, 2018 · US
Positive electrode active material for secondary battery, positive electrode for secondary battery, and secondary battery
US12394791B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12394791-B2 |
| Application number | US-202218089366-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 27, 2022 |
| Priority date | Jul 27, 2020 |
| Publication date | Aug 19, 2025 |
| Grant date | Aug 19, 2025 |
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- Title
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Abstract
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A secondary battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution. The positive electrode active material includes a lithium composite oxide of a layered rock-salt type. The lithium composite oxide includes lithium, cobalt, aluminum, magnesium, an additional element, and oxygen as constituent elements. The additional element includes at least one of fluorine, phosphorus, or sulfur. According to an analysis of the positive electrode active material by inductively coupled plasma optical emission spectrometry, a content of aluminum is greater than a content of magnesium. According to an analysis of a surface of the positive electrode active material by X-ray photoelectron spectroscopy, a sum of an abundance of chemical bonds between magnesium and oxygen and an abundance of chemical bonds between magnesium and the additional element is greater than a sum of an abundance of chemical bonds between aluminum and oxygen and an abundance of chemical bonds between aluminum and the additional element.
First claim
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The invention claimed is: 1. A positive electrode active material for a secondary battery, the positive electrode active material comprising a lithium composite oxide of a layered rock-salt type, wherein the lithium composite oxide includes lithium, cobalt, aluminum, magnesium, an additional element, and oxygen as constituent elements, the additional element including at least one of fluorine, phosphorus, or sulfur, according to an analysis of the positive electrode active material by inductively coupled plasma optical emission spectrometry, a content of aluminum is greater than a content of magnesium, and according to an analysis of a surface of the positive electrode active material by X-ray photoelectron spectroscopy, a sum of an abundance of chemical bonds between magnesium and oxygen and an abundance of chemical bonds between magnesium and the additional element is greater than a sum of an abundance of chemical bonds between aluminum and oxygen and an abundance of chemical bonds between aluminum and the additional element. 2. A positive electrode for a secondary battery, the positive electrode comprising a positive electrode active material, wherein the positive electrode active material includes a lithium composite oxide of a layered rock-salt type, the lithium composite oxide includes lithium, cobalt, aluminum, magnesium, an additional element, and oxygen as constituent elements, the additional element including at least one of fluorine, phosphorus, or sulfur, according to an analysis of the positive electrode active material by inductively coupled plasma optical emission spectrometry, a content of aluminum is greater than a content of magnesium, and according to an analysis of a surface of the positive electrode active material by X-ray photoelectron spectroscopy, a sum of an abundance of chemical bonds between magnesium and oxygen and an abundance of chemical bonds between magnesium and the additional element is greater than a sum of an abundance of chemical bonds between aluminum and oxygen and an abundance of chemical bonds between aluminum and the additional element. 3. A secondary battery comprising: a positive electrode including a positive electrode active material; a negative electrode; and an electrolytic solution, wherein the positive electrode active material includes a lithium composite oxide of a layered rock-salt type, the lithium composite oxide includes lithium, cobalt, aluminum, magnesium, an additional element, and oxygen as constituent elements, the additional element including at least one of fluorine, phosphorus, or sulfur, according to an analysis of the positive electrode active material by inductively coupled plasma optical emission spectrometry, a content of aluminum is greater than a content of magnesium, and according to an analysis of a surface of the positive electrode active material by X-ray photoelectron spectroscopy, a sum of an abundance of chemical bonds between magnesium and oxygen and an abundance of chemical bonds between magnesium and the additional element is greater than a sum of an abundance of chemical bonds between aluminum and oxygen and an abundance of chemical bonds between aluminum and the additional element. 4. The secondary battery according to claim 3 , wherein a molar ratio of cobalt is greater than a molar ratio of each of aluminum, magnesium, and the additional element. 5. The secondary battery according to claim 3 , wherein the content of aluminum is greater than or equal to 4500 parts per million. 6. The secondary battery according to claim 5 , wherein the content of aluminum is less than or equal to 7800 parts per million. 7. The secondary battery according to claim 3 , wherein the sum of the abundance of the chemical bonds between magnesium and oxygen and the abundance of the chemical bonds between magnesium and the additional element is greater than or equal to 2.9, and the sum of the abundance of the chemical bonds between aluminum and oxygen and the abundance of the chemical bonds between aluminum and the additional element is less than or equal to 0.4. 8. The secondary battery according to claim 3 , wherein the secondary battery comprises a lithium-ion secondary battery.
Assignees
Inventors
Classifications
Positive electrodes · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
as mixtures · CPC title
Selection of substances as active materials, active masses, active liquids · CPC title
as layered products · CPC title
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Frequently asked questions
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- What does patent US12394791B2 cover?
- A secondary battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution. The positive electrode active material includes a lithium composite oxide of a layered rock-salt type. The lithium composite oxide includes lithium, cobalt, aluminum, magnesium, an additional element, and oxygen as constituent elements. The additi…
- Who is the assignee on this patent?
- Murata Manufacturing Co
- 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 19 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).