Negative electrode active material, negative electrode comprising negative electrode active material, secondary battery comprising negative electrode, and method for preparing negative electrode active material
US-2024063371-A1 · Feb 22, 2024 · US
Negative active material and rechargeable lithium battery including same
US12355084B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12355084-B2 |
| Application number | US-202318384494-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 27, 2023 |
| Priority date | Apr 20, 2023 |
| Publication date | Jul 8, 2025 |
| Grant date | Jul 8, 2025 |
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- Title
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Abstract
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A negative active material, including a silicon-carbon composite including silicon and amorphous carbon, a metal oxide, and a metal silicate.
First claim
Opening claim text (preview).
What is claimed is: 1. A negative active material, comprising: a silicon-carbon composite including silicon and amorphous carbon; a metal oxide; and a metal silicate, wherein: an amount of the metal oxide is about 0.21 wt % to about 14 wt %, based on a total weight of the negative active material, an amount of the metal silicate is about 0.1 wt % to about 7 wt % based on a total weight of the negative active material, and an amount of the metal oxide is greater than an amount of the metal silicate. 2. The negative active material as claimed in claim 1 , wherein the metal oxide is an oxide of Mg, Zn, Al, Fe, Ni, or a combination thereof. 3. The negative active material as claimed in claim 1 , wherein the metal silicate is a silicate of Mg, Zn, Al, Fe, Ni, or a combination thereof. 4. The negative active material as claimed in claim 1 , wherein the metal oxide is an Mg oxide. 5. The negative active material as claimed in claim 1 , wherein the metal silicate is an Mg silicate. 6. The negative active material as claimed in claim 1 , wherein an amount of the metal oxide is about 0.25 wt % to about 14 wt % based on a total weight of the negative active material. 7. The negative active material as claimed in claim 1 , wherein the metal of the metal oxide and the metal silicate is the same. 8. The negative active material as claimed in claim 1 , wherein the amorphous carbon is soft carbon or hard carbon, a mesophase pitch carbonized product, sintered cokes, or a combination thereof. 9. The negative active material as claimed in claim 1 , wherein the silicon-carbon composite includes amorphous carbon coated on a surface of the silicon. 10. The negative active material of claim 1 , wherein the silicon-carbon composite further includes crystalline carbon. 11. A rechargeable lithium battery, comprising: a negative electrode including the negative active material of claim 1 ; a positive electrode; and an electrolyte. 12. The negative active material as claimed in claim 1 , wherein the metal oxide is an oxide of Zn, Al, Fe, Ni, or a combination thereof.
Assignees
Inventors
Classifications
Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title
Electrodes based on metals, Si or alloys · CPC title
for inserting or intercalating light metals · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
- H01M4/366Primary
as layered products · CPC title
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Frequently asked questions
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- What does patent US12355084B2 cover?
- A negative active material, including a silicon-carbon composite including silicon and amorphous carbon, a metal oxide, and a metal silicate.
- Who is the assignee on this patent?
- Samsung Sdi Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/366. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 08 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).