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US-12176543-B2 · Dec 24, 2024 · US
Silicon-based anode and method for manufacturing the same
US9543575B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9543575-B2 |
| Application number | US-201013510038-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 16, 2010 |
| Priority date | Nov 16, 2009 |
| Publication date | Jan 10, 2017 |
| Grant date | Jan 10, 2017 |
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Abstract
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A silicon-based anode comprising silicon, a carbon coating that coats the surface of the silicon, a polyvinyl acid that binds to at least a portion of the silicon, and vinylene carbonate that seals the interface between the silicon and the polyvinyl acid. Because of its properties, polyvinyl acid binders offer improved anode stability, tunable properties, and many other attractive attributes for silicon-based anodes, which enable the anode to withstand silicon cycles of expansion and contraction during charging and discharging.
First claim
Opening claim text (preview).
What is claimed is: 1. A silicon-based anode, comprising: substantially elemental silicon particles suspended in a matrix; polyvinyl acid bound to at least a portion of the silicon particles to create an interface between the polyvinyl acid and silicon particles; and vinylene carbonate confined within and dispersed throughout the anode in contact with and covering a boundary between the polyvinyl acid and silicon particles. 2. The silicon-based anode of claim 1 , wherein the polyvinyl acid is polyacrylic acid. 3. The silicon-based anode of claim 1 , comprising approximately 10-25 weight percent of polyvinyl acid to silicon anode particles. 4. The silicon-based anode of claim 3 , comprising approximately 22 weight percent of polyvinyl acid to silicon anode particles. 5. The silicon-based anode of claim 1 , comprising approximately 1-15 weight percent of vinylene carbonate to silicon particles. 6. The silicon-based anode of claim 5 , comprising approximately 3 weight percent of vinylene carbonate to silicon particles. 7. The silicon-based anode of claim 1 , wherein the vinylene carbonate seals at least a portion of the interface between the polyvinyl acid and silicon particles. 8. The silicon-based anode of claim 1 , wherein the vinylene carbonate repairs defects in a solid-electrolyte interphase layer of the silicon-based anode. 9. The silicon-based anode of claim 1 , wherein the vinylene carbonate repairs defects in the interface between the polyvinyl acid and silicon particles. 10. The silicon-based anode of claim 1 , wherein at least a portion of a surface of the silicon particles are coated. 11. The silicon-based anode of claim 10 , wherein at least a portion of the surface of the silicon particles are coated with a carbon coating.
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Classifications
Carbon or graphite · CPC title
Cross-Sectional Technologies · mapped topic
Silicon or alloys based on silicon · CPC title
Cross-Sectional Technologies · mapped topic
as layered products · CPC title
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- What does patent US9543575B2 cover?
- A silicon-based anode comprising silicon, a carbon coating that coats the surface of the silicon, a polyvinyl acid that binds to at least a portion of the silicon, and vinylene carbonate that seals the interface between the silicon and the polyvinyl acid. Because of its properties, polyvinyl acid binders offer improved anode stability, tunable properties, and many other attractive attributes fo…
- Who is the assignee on this patent?
- Yushin Gleb Nikolayevich, Luzinov Igor, Zdyrko Bogdan, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification H01M4/1395. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 10 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).