Binder composition for nonaqueous secondary batteries and slurry composition for nonaqueous secondary batteries
US-2020152985-A1 · May 14, 2020 · US
Binder for secondary battery
US11978906B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11978906-B2 |
| Application number | US-202117904991-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 24, 2021 |
| Priority date | Feb 26, 2020 |
| Publication date | May 7, 2024 |
| Grant date | May 7, 2024 |
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Abstract
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The present invention provides a binder for a secondary battery having excellent binding force. A binder for a secondary battery comprising a polymer compound, wherein the polymer compound contains an acrylic repeating unit, and a 3% by mass aqueous solution of the polymer compound has a yellowness index of 14 or less.
First claim
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The invention claimed is: 1. A mixture for a secondary battery electrode comprising; (a) a binder comprising a polymer compound, and (b) an active material, wherein the polymer compound contains an acrylic repeating unit, and wherein a 3% by mass aqueous solution of the polymer compound has a yellowness index of 14 or less. 2. The mixture for a secondary battery according to claim 1 , wherein the polymer compound contains a repeating unit represented by formula (1): wherein each R 1 is independently a hydrogen atom or a methyl group, and each R 2 is independently an NH 2 group, an OH group, an ONa group, or an OLi group. 3. The mixture for a secondary battery electrode according to claim 1 , wherein the active material contains a carbon material. 4. The mixture for a secondary battery electrode according to claim 1 , wherein the active material contains at least one of silicon and silicon oxide. 5. An electrode for a secondary battery comprising the mixture for a secondary battery electrode according to claim 1 . 6. A secondary battery comprising the electrode for a secondary battery according to claim 5 . 7. A lithium-ion secondary battery comprising the electrode for a secondary battery according to claim 5 . 8. The mixture for a secondary battery according to claim 1 , wherein the polymer compound contains a repeating unit represented by formula (2): 9. A method of using the mixture for a secondary battery electrode according to claim 1 as a binder for a secondary battery. 10. The method according to claim 9 , wherein the polymer compound contains a repeating unit represented by Formula (1): wherein each R 1 is independently a hydrogen atom or a methyl group, and each R 2 is independently an NH 2 group, an OH group, an ONa group, or an OLi group.
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Frequently asked questions
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- What does patent US11978906B2 cover?
- The present invention provides a binder for a secondary battery having excellent binding force. A binder for a secondary battery comprising a polymer compound, wherein the polymer compound contains an acrylic repeating unit, and a 3% by mass aqueous solution of the polymer compound has a yellowness index of 14 or less.
- Who is the assignee on this patent?
- Sumitomo Seika Chemicals
- What technology area does this patent fall under?
- Primary CPC classification H01M4/622. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 07 2024 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).