Anode material, method for preparing the same, and lithium ion battery
US-2024322131-A1 · Sep 26, 2024 · US
Negative electrode active material, manufacturing method of negative electrode active material, negative electrode composition, negative electrode for lithium secondary battery including same, and lithium secondary battery including negative electrode
US2024351886A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2024351886-A1 |
| Application number | US-202418593631-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 1, 2024 |
| Priority date | Apr 20, 2023 |
| Publication date | Oct 24, 2024 |
| Grant date | — |
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Abstract
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A negative electrode active material includes a silicon-based active material that includes silicon-based grains. A high angle grain boundary ratio in the silicon-based grains is 30% or more, and the silicon-based active material includes a composition that satisfies following Formulas 1 and 2:about1µm≤particlesize(D50)ofsilicon-basedactivematerial≤10µm[Formula1]about2nm≤grainsizeofsilicon-basedactivematerial≤1µm.[Formula2]
First claim
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What is claimed is: 1 . A negative electrode active material comprising: a silicon-based active material comprising silicon-based grains, wherein a high angle grain boundary ratio in the silicon-based grains is 30% or more, and the silicon-based active material includes a composition that satisfies following Formulas 1 and 2: about 1 µm ≤ particle size ( D 50 ) of silicon - based active material ≤ 10 µm [ Formula 1 ] about 2 nm ≤ grain size of silicon - based active material ≤ 1 µm . [ Formula 2 ] 2 . The negative electrode active material according to claim 1 , wherein the silicon-based active material additionally comprises a pulverized product of a silicon precursor, and the silicon precursor includes a composition that satisfies following Formulas 3 and 4: about 10 µm ≤ plate thickness of silicon precursor ≤ 2 mm [ Formula 3 ] about 2 nm ≤ grain size in silicon precursor ≤ 1 µm . [ Formula 4 ] 3 . The negative electrode active material according to claim 1 , wherein an average misorientation angle of the silicon-based grains is about 5° or more. 4 . The negative electrode active material according to claim 1 , wherein the silicon-based active material includes one or more selected from the group consisting of SiOx (x=0) and SiOx (0<x<2), and a content of SiOx (x=0) is about 70 parts by weight or more relative to 100 parts by weight of the silicon-based active material. 5 . A silicon-based precursor comprising a composition satisfying following Formulas 3 and 4: about 10 µm ≤ plate thickness of silicon
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Classifications
Energy storage using batteries · CPC title
as mixtures · 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
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Electrodes based on metals, Si or alloys · CPC title
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- What does patent US2024351886A1 cover?
- A negative electrode active material includes a silicon-based active material that includes silicon-based grains. A high angle grain boundary ratio in the silicon-based grains is 30% or more, and the silicon-based active material includes a composition that satisfies following Formulas 1 and 2:about1µm≤particlesize(D50)ofsilicon-basedactivematerial≤10µm[Formula1]about2nm≤grainsize…
- Who is the assignee on this patent?
- Lg Energy Solution Ltd
- What technology area does this patent fall under?
- Primary CPC classification C01B33/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Oct 24 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).