Secondary battery management system
US-2024396357-A1 · Nov 28, 2024 · US
Lithium ion battery
US9343740B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9343740-B2 |
| Application number | US-201113186995-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 20, 2011 |
| Priority date | Jan 23, 2009 |
| Publication date | May 17, 2016 |
| Grant date | May 17, 2016 |
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- Title
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- Abstract
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Abstract
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There is provided a lithium ion battery which maintains the flame retardancy of an electrolyte over a long period of time, has high energy density, and has improved charge/discharge cycle characteristics, high temperature storage characteristics, and rate characteristics. The lithium ion battery according to the present exemplary embodiment is a lithium ion battery comprising an electrolyte containing at least an ionic liquid and a lithium salt, a positive electrode, and a negative electrode, wherein the negative electrode includes a negative electrode active material which is a carbon material treated with a surface treatment agent.
First claim
Opening claim text (preview).
The invention claimed is: 1. A lithium ion battery comprising an electrolyte containing at least an ionic liquid and a lithium salt, a positive electrode, and a negative electrode including a negative electrode active material, wherein the negative electrode active material is a carbon material treated with a surface treatment agent, and wherein the surface treatment agent is ethyltrimethoxysilane. 2. The lithium ion battery according to claim 1 , wherein the carbon material of the negative electrode active material includes at least graphite particles in which the interlayer distance of the (002) plane is from 0.335 to 0.337 nm. 3. The lithium ion battery according to claim 1 , wherein the carbon material of the negative electrode active material is graphite particles whose surface is coated or adhered with amorphous carbon. 4. The lithium ion battery according to claim 3 , wherein the mass of the amorphous carbon with which the surface of the graphite particles is coated or adhered is 1% by mass or more and 30% by mass or less of the negative electrode active material. 5. The lithium ion battery according to claim 1 , wherein the specific surface area of the carbon material of the negative electrode active material is 0.4 to 1.8 m2/g. 6. The lithium ion battery according to claim 1 , wherein the electrolyte comprises an aprotic solvent. 7. The lithium ion battery according to claim 1 , wherein the electrolyte contains a disulfonate ester. 8. The lithium ion battery according to claim 1 , wherein the electrolyte contains vinylene carbonate or a derivative thereof. 9. The lithium ion battery according to claim 1 , wherein the electrolyte contains 1,3-propanesultone or a derivative thereof. 10. The lithium ion battery according to claim 1 , wherein the electrolyte has gelled with a polymer.
Assignees
Inventors
Classifications
characterised by the solvents · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
Immobilising or gelification of electrolyte · CPC title
as layered products · CPC title
Liquid materials · CPC title
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- What does patent US9343740B2 cover?
- There is provided a lithium ion battery which maintains the flame retardancy of an electrolyte over a long period of time, has high energy density, and has improved charge/discharge cycle characteristics, high temperature storage characteristics, and rate characteristics. The lithium ion battery according to the present exemplary embodiment is a lithium ion battery comprising an electrolyte con…
- Who is the assignee on this patent?
- Kaneko Shinako, Ishikawa Hitoshi, Kono Yasutaka, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H01M4/583. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 17 2016 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).