Carbon nanotube dispersion liquid, slurry for secondary battery electrode, method of producing slurry for secondary battery electrode, electrode for secondary battery, and secondary battery
US-2021005894-A1 · Jan 7, 2021 · US
Conductive material dispersion liquid, method of producing slurry for non-aqueous secondary battery positive electrode, method of producing positive electrode for non-aqueous secondary battery, and method of producing non-aqueous secondary battery
US12428300B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12428300-B2 |
| Application number | US-202118245159-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 31, 2021 |
| Priority date | Sep 29, 2020 |
| Publication date | Sep 30, 2025 |
| Grant date | Sep 30, 2025 |
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Abstract
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Provided is a technique that makes it possible to cause a secondary battery to display excellent output characteristics and other characteristics. Secondary battery production is performed using a conductive material dispersion liquid that contains a conductive material, a dispersant, and a solvent. The conductive material is one or more carbon nanotubes having a specific surface area of not less than 800 m 2 /g and not more than 1,300 m 2 /g and having a volume-average particle diameter (D90) of 50 μm or less in the conductive material dispersion liquid. The dispersant is a hydrogenated acrylonitrile-butadiene copolymer having a weight-average molecular weight of 200,000 or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A conductive material dispersion liquid comprising a conductive material, a dispersant, and a solvent, wherein the conductive material is one or more carbon nanotubes having a specific surface area of not less than 800 m 2 /g and not more than 1,300 m 2 /g, the carbon nanotubes have a volume-average particle diameter (D90) of 50 μm or less in the conductive material dispersion liquid, the dispersant is a hydrogenated acrylonitrile-butadiene copolymer, and the hydrogenated acrylonitrile-butadiene copolymer has a weight-average molecular weight of 200,000 or less. 2. The conductive material dispersion liquid according to claim 1 , wherein the hydrogenated acrylonitrile-butadiene copolymer has an iodine value of 25 mg/100 mg or less. 3. The conductive material dispersion liquid according to claim 1 , wherein content of the dispersant in the conductive material dispersion liquid is not less than 50 parts by mass and not more than 400 parts by mass per 100 parts by mass of the conductive material. 4. A method of producing a slurry for a non-aqueous secondary battery positive electrode comprising mixing a positive electrode active material, a binder, and the conductive material dispersion liquid according to claim 1 to obtain a slurry for a non-aqueous secondary battery positive electrode. 5. The method of producing a slurry for a non-aqueous secondary battery positive electrode according to claim 4 , wherein content of the conductive material in the slurry for a non-aqueous secondary battery positive electrode is less than 0.1 parts by mass per 100 parts by mass of the positive electrode active material. 6. The method of producing a slurry for a non-aqueous secondary battery positive electrode according to claim 4 , wherein content of the binder in the slurry for a non-aqueous secondary battery positive electrode is not less than 0.1 parts by mass and not more than 6 parts by mass per 100 parts by mass of the positive electrode active material. 7. A method of producing a positive electrode for a non-aqueous secondary battery comprising forming a positive electrode mixed material layer using a slurry for a non-aqueous secondary battery positive electrode obtained by the method according to claim 4 . 8. A method of producing a non-aqueous secondary battery comprising using a positive electrode for a non-aqueous secondary battery obtained by the method according to claim 7 .
Assignees
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Classifications
Positive electrodes · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
involving impregnation with a solution, dispersion, paste or dry powder (H01M4/0438 takes precedence) · CPC title
Surface area · CPC title
Diameter · CPC title
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- What does patent US12428300B2 cover?
- Provided is a technique that makes it possible to cause a secondary battery to display excellent output characteristics and other characteristics. Secondary battery production is performed using a conductive material dispersion liquid that contains a conductive material, a dispersant, and a solvent. The conductive material is one or more carbon nanotubes having a specific surface area of not le…
- Who is the assignee on this patent?
- Zeon Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M4/625. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 30 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).