Multilayer porous film
US-9070935-B2 · Jun 30, 2015 · US
Negative electrode active material for electric device
US9843040B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9843040-B2 |
| Application number | US-201214364157-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 29, 2012 |
| Priority date | Dec 16, 2011 |
| Publication date | Dec 12, 2017 |
| Grant date | Dec 12, 2017 |
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Abstract
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A negative electrode active material for an electric device includes an alloy containing Si in a range from 23% to 64% exclusive, Sn in a range from 4% to 58% inclusive, Zn in a range from 0% to 65% exclusive, and inevitable impurities as a residue. The negative electrode active material can be obtained with a multi DC magnetron sputtering apparatus by use of, for example, silicon, tin and zinc as targets. An electric device such as a lithium ion secondary battery employing the negative electrode active material can improve cycle life of the battery and ensure a high capacity and high cycle durability.
First claim
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The invention claimed is: 1. A negative electrode active material for an electric device comprising an alloy consisting essentially of, in terms of mass ratio, a content of silicon is greater than 23% to less than 58%, a content of tin is greater than or equal to 4% to less than or equal to 7%, a content of zinc is greater than 38% to less than 61%, and inevitable impurities as a residue. 2. The negative electrode active material for an electric device according to claim 1 , wherein a content of silicon is greater than 23% to less than 58%, a content of tin is greater than or equal to 5% to less than or equal to 6% and a content of zinc is greater than 38% to less than 61%. 3. The negative electrode active material for an electric device according to claim 1 , wherein a content of silicon is greater than or equal to 37% to less than or equal to 53%, a content of tin is greater than or equal to 4% to less than or equal to 7% and a content of zinc is greater than 38% to less than 61%. 4. The negative electrode active material for an electric device according to claim 3 , wherein a content of silicon is greater than or equal to 37% to less than or equal to 47%, a content of tin is greater than or equal to 5% to less than or equal to 6% and a content of zinc is greater than or equal to 47% to less than or equal to 58%. 5. A negative electrode for an electric device, comprising the negative electrode active material according to claim 1 . 6. An electric device comprising the negative electrode for an electric device according to claim 5 . 7. An electric device comprising the negative electrode active material for an electric device according to claim 1 . 8. The electric device according to claim 7 , wherein the electric device is a lithium ion secondary battery.
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- What does patent US9843040B2 cover?
- A negative electrode active material for an electric device includes an alloy containing Si in a range from 23% to 64% exclusive, Sn in a range from 4% to 58% inclusive, Zn in a range from 0% to 65% exclusive, and inevitable impurities as a residue. The negative electrode active material can be obtained with a multi DC magnetron sputtering apparatus by use of, for example, silicon, tin and zinc…
- Who is the assignee on this patent?
- Nissan Motor
- What technology area does this patent fall under?
- Primary CPC classification H01M4/387. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 12 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).