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Negative electrode slurry composition, lithium ion secondary battery negative electrode, and lithium ion secondary battery
US9583768B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9583768-B2 |
| Application number | US-201314403698-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 21, 2013 |
| Priority date | Jun 28, 2012 |
| Publication date | Feb 28, 2017 |
| Grant date | Feb 28, 2017 |
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Abstract
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Provided is a negative electrode slurry composition including a binder resin, a water-soluble polymer, and a negative electrode active material, wherein the binder resin including (A) a styrene-butadiene copolymer latex having a gel amount of 70 to 98% and a glass transition temperature of −30° C. to 60° C. in dynamic viscoelasticity measurement and (B) an acryl polymer latex having a gel amount of 70 to 98% and a glass transition temperature of −100° C. to 0° C. in dynamic viscoelasticity measurement, and the negative electrode active material including a carbon-based active material and a silicon-based active material.
First claim
Opening claim text (preview).
The invention claimed is: 1. A negative electrode slurry composition comprising a binder resin, a water-soluble polymer, and a negative electrode active material, wherein the binder resin comprising (A) a styrene-butadiene copolymer latex having a gel amount of 70 to 98% and a glass transition temperature of −30° C. to 60° C. in dynamic viscoelasticity measurement and (B) an acryl polymer latex having a gel amount of 70 to 98% and a glass transition temperature of −100° C. to 0° C. in dynamic viscoelasticity measurement, the negative electrode slurry composition comprises 0.1 to 30 parts by mass of the (B) acryl polymer latex in terms of a solid content based on 100 parts by mass of the (A) styrene-butadiene copolymer latex in terms of a solid content, and the negative electrode active material comprising a carbon-based active material and a silicon-based active material. 2. The negative electrode slurry composition according to claim 1 , wherein the negative electrode active material comprises 0.1 to 50 parts by mass of the silicon-based active material based on 100 parts by mass of the carbon-based active material contained in the negative electrode active material. 3. The negative electrode slurry composition according to claim 1 , wherein the silicon-based active material is SiO X (0.01≦x<2) formed of at least one of SiO and SiO 2 , and Si. 4. The negative electrode slurry composition according to claim 2 , wherein the silicon-based active material is SiO X (0.01≦x<2) formed of at least one of SiO and SiO 2 , and Si. 5. The negative electrode slurry composition according to claim 1 , wherein the silicon-based active material is combined with conductive carbon. 6. A lithium ion secondary battery negative electrode which is formed by applying the negative electrode slurry composition according to claim 1 onto a current collector and drying the negative electrode slurry composition. 7. A lithium ion secondary battery comprising the lithium ion secondary battery negative electrode according to claim 6 .
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Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title
Silicon or alloys based on silicon · CPC title
as layered products · 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
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- What does patent US9583768B2 cover?
- Provided is a negative electrode slurry composition including a binder resin, a water-soluble polymer, and a negative electrode active material, wherein the binder resin including (A) a styrene-butadiene copolymer latex having a gel amount of 70 to 98% and a glass transition temperature of −30° C. to 60° C. in dynamic viscoelasticity measurement and (B) an acryl polymer latex having a gel amoun…
- Who is the assignee on this patent?
- Zeon Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M4/0404. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 28 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).