Positive electrode active material slurry including two types of binders and positive electrode prepared therefrom
US-2016336587-A1 · Nov 17, 2016 · US
Electrode active material slurry, preparation method thereof, and all-solid secondary battery comprising the same
US10756352B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10756352-B2 |
| Application number | US-201916511788-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 15, 2019 |
| Priority date | Jan 26, 2016 |
| Publication date | Aug 25, 2020 |
| Grant date | Aug 25, 2020 |
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Abstract
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The electrode active material slurry may include the clustered complex including the first binder and the slurry including the second binder so as to decrease a surface area of the overall complex, such that adhesion property with the current collector may be sufficiently secured even by using a small amount of binder, and performance of the all-solid secondary battery may be further improved.
First claim
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What is claimed is: 1. A method of preparing an electrode active material slurry comprising: preparing a clustered complex by mixing an electrode active material, a solid electrolyte, a conductive material, and a first binder, and by applying energy; and mixing the clustered complex with a slurry including a solvent and a second binder, wherein the first binder is any one selected from the group consisting of polytetrafluoroethylene (PTFE), polyethylene oxide (PEO), and polyvinyl pyrrolidone (PVP), or mixtures thereof. 2. The method according to claim 1 , wherein the energy applied has a range of about 0.01 to 0.5 G on the basis of G-value calculation. 3. The method according to claim 1 , wherein the energy is applied by a mechanical milling method or a kneading method selected from the group consisting of ball mill, planetary mill, stirred ball mill, SPEX mill, Planetary mill, Attrition mill, Magento-ball mill, vibrating mill, mortar, non bubbling kneader, planetary mixer, and voltax mixer. 4. The method according to claim 1 , wherein the first binder is in a form of particles having an average particle size (D 50 ) of about 0.01 μm to 10 μm. 5. The method according to claim 1 , wherein the second binder is any one selected from the group consisting of styrene butadiene rubber (SBR), butadiene rubber (BR), nitrile butadiene rubber (NBR), styrene butadiene styrene block polymer (SBS), styrene ethylene butadiene block polymer (SEB), styrene-(styrene butadiene)-styrene block polymer, natural rubber (NR), isoprene rubber (IR), ethylene-propylene-diene terpolymer (EPDM) and poly(ethylene-co-propylene-co-5-methylene-2-norbornene), or mixtures thereof. 6. The method according to claim 1 , wherein a weight ratio of the first binder and the second binder is about 1:0.1 to 2 (parts by weight). 7. The preparation method according to claim 1 , wherein the first binder has a content of about 1 to 5 wt % based on 100 wt % of a mixture of the active material and the solid electrolyte. 8. The preparation method according to claim 1 , wherein the second binder has a content of about 1 to 10 wt % based on 100 wt % of a mixture of the active material and the solid electrolyte.
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Classifications
Manufacturing or production processes characterised by the final manufactured product · CPC title
Energy storage using batteries · CPC title
inorganic · CPC title
Positive electrodes · CPC title
- H01M4/623Primary
fluorinated polymers · CPC title
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Frequently asked questions
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- What does patent US10756352B2 cover?
- The electrode active material slurry may include the clustered complex including the first binder and the slurry including the second binder so as to decrease a surface area of the overall complex, such that adhesion property with the current collector may be sufficiently secured even by using a small amount of binder, and performance of the all-solid secondary battery may be further improved.
- Who is the assignee on this patent?
- Hyundai Motor Co Ltd, Kia Motors Corp, Industry-Univ Cooperation Foundation Hanyang Univ
- What technology area does this patent fall under?
- Primary CPC classification H01M4/623. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 25 2020 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).