Negative electrode active material for lithium-ion battery, negative electrode for lithium-ion battery and lithium-ion battery
US-11862787-B2 · Jan 2, 2024 · US
Electrode material for lithium-ion battery and Si alloy composite powder
US12438146B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12438146-B2 |
| Application number | US-202218693463-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 26, 2022 |
| Priority date | Sep 27, 2021 |
| Publication date | Oct 7, 2025 |
| Grant date | Oct 7, 2025 |
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Abstract
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The present invention relates to an electrode material for lithium ion battery, containing: a graphite powder; and a Si alloy composite powder, in which the Si alloy composite powder has an average particle diameter of 5 μm or less and contains Si particles, Si—X compound particles (X=Fe, Ni, Cr, Co, Mn, Zr, or Ti), and at least one of Sn—Y compound particles and Al—Y compound particles (Y=Cu, Fe, Ni, Cr, Co, Mn, Zr, or Ti), a proportion of the Si particles in the Si alloy composite powder is 30 mass % to 95 mass %, and a coverage of the Si alloy composite powder on a surface of graphite particles is 5% or more.
First claim
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The invention claimed is: 1. An electrode material for lithium ion battery, comprising: a graphite powder; and a Si alloy composite powder, wherein the Si alloy composite powder has an average particle diameter of 5 μm or less and contains Si particles, Si—X compound particles, and at least one of Sn—Y compound particles and Al—Y compound particles, an element X constituting the Si—X compound particles is at least one element selected from the group consisting of Fe, Ni, Cr, Co, Mn, Zr, and Ti, an element Y constituting the Sn—Y compound particles and the Al—Y compound particles is at least one element selected from the group consisting of Cu, Fe, Ni, Cr, Co, Mn, Zr, and Ti, a proportion of the Si particles in the Si alloy composite powder is 30 mass % to 95 mass %, and a coverage of the Si alloy composite powder on a surface of graphite particles is 5% or more, and wherein the Si particles are particles consisting only of a Si phase, or particles in which 95 mass % or more of the particles consist of a Si phase, and the Si—X compound particles are particles consisting only of a Si—X compound, or particles in which 95 mass % or more of the particles consist of a Si—X compound. 2. The electrode material for lithium ion battery according to claim 1 , wherein a proportion of the graphite powder in a mixed powder of the graphite powder and the Si alloy composite powder is 97 mass % to 20 mass %. 3. The electrode material for lithium ion battery according to claim 1 , wherein the element X is at least one element selected from the group consisting of Fe, Ni, Cr, and Zr. 4. The electrode material for lithium ion battery according to claim 1 , wherein a mass ratio represented by {Si—X compound/(total of Sn—Y compound and Al—Y compound)} is 1 to 39. 5. The electrode material for lithium ion battery according to claim 1 , wherein the element Y is Cu. 6. The electrode material for lithium ion battery according to claim 1 , wherein the average particle diameter of the Si alloy composite powder is 1 μm or less. 7. The electrode material for lithium ion battery according to claim 1 , wherein the average particle diameter of the Si alloy composite powder is 0.7 um or less. 8. A Si alloy composite powder, having an average particle diameter of 5 μm or less, comprising: Si particles; Si—X compound particles; and at least one of Sn—Y compound particles and Al—Y compound particles, wherein an element X constituting the Si—X compound particles is at least one element selected from the group consisting of Fe, Ni, Cr, Co, Mn, Zr, and Ti, an element Y constituting the Sn—Y compound particles and the Al—Y compound particles is at least one element selected from the group consisting of Cu, Fe, Ni, Cr, Co, Mn, Zr, and Ti, and a proportion of the Si particles in the Si alloy composite powder is 30 mass % to 95 mass %, and wherein the Si particles are particles consisting only of a Si phase, or particles in which 95 mass % or more of the particles consist of a Si phase, and the Si—X compound particles are particles consisting only of a Si—X compound, or particles in which 95 mass % or more of the particles consist of a Si—X compound. 9. The Si alloy composite powder according to claim 8 , which is used for an electrode material together with a graphite powder.
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Classifications
mainly consisting of carbon-silicon compounds, carbon or silicon · CPC title
Micrometer sized, i.e. from 1-100 micrometer · CPC title
Electric properties · CPC title
Nanometer sized, i.e. from 1-100 nanometer · CPC title
Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title
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Frequently asked questions
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- What does patent US12438146B2 cover?
- The present invention relates to an electrode material for lithium ion battery, containing: a graphite powder; and a Si alloy composite powder, in which the Si alloy composite powder has an average particle diameter of 5 μm or less and contains Si particles, Si—X compound particles (X=Fe, Ni, Cr, Co, Mn, Zr, or Ti), and at least one of Sn—Y compound particles and Al—Y compound particles (Y=Cu, …
- Who is the assignee on this patent?
- Daido Steel Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/364. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 07 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).