Negative electrode active material having double coating layer, method for preparing the same and lithium secondary battery including the same
US-2017170465-A1 · Jun 15, 2017 · US
Lithium-ion rechargeable battery negative electrode active material and preparation method thereof, lithium-ion rechargeable battery negative electrode plate, and lithium-ion rechargeable battery
US11569496B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11569496-B2 |
| Application number | US-201816010947-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 18, 2018 |
| Priority date | Dec 18, 2015 |
| Publication date | Jan 31, 2023 |
| Grant date | Jan 31, 2023 |
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Abstract
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A lithium-ion rechargeable battery negative electrode active material and a preparation method thereof, a lithium-ion rechargeable battery negative electrode plate, and a lithium-ion rechargeable battery are provided. The negative electrode active material includes a carbon core and a coating layer formed on a surface of the carbon core, a material of the coating layer includes amorphous carbon and a doping element, and the doping element includes element nitrogen. The lithium-ion rechargeable battery negative electrode active material has the carbon core, and the coating layer that includes the doping element and the amorphous carbon is provided on the surface of the carbon core.
First claim
Opening claim text (preview).
What is claimed is: 1. A lithium-ion rechargeable battery negative electrode active material comprising: a carbon core; and a coating layer formed over a surface of the carbon core, wherein the coating layer is of a double-layer structure comprising a doped layer and an amorphous carbon layer sequentially formed on the surface of the carbon core, wherein the amorphous carbon layer is the outermost layer, and wherein the doped layer comprises amorphous carbon and a doping element, wherein the doping element comprises nitrogen. 2. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein a mass content of the doped layer in the entire negative electrode active material is 0.1% to 30%, and a mass content of the doping element in the doped layer is 0.1% to 30%. 3. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein the amorphous carbon in the amorphous carbon layer and in the doped layer is any one or a mixture of bitumen, epoxy resin, or Bakelite resin. 4. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein a mass content of the amorphous carbon in the amorphous carbon layer and in the doped layer is 0.1% to 30%. 5. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein a material of the carbon core comprises natural graphite, artificial graphite, expanded graphite, graphite oxide, hard carbon, soft carbon, graphene, carbon nanotube, and/or carbon fiber. 6. A lithium-ion rechargeable battery negative electrode plate, wherein the lithium-ion rechargeable battery negative electrode plate comprises a current collector and the lithium-ion rechargeable battery negative electrode active material according to claim 1 that is coated on the current collector. 7. A lithium-ion rechargeable battery comprising a lithium-ion rechargeable battery negative electrode plate, a positive electrode plate, a separator, a non-aqueous electrolyte, and an enclosure, and wherein the lithium-ion rechargeable battery negative electrode plate comprises a current collector and the lithium-ion rechargeable battery negative electrode active material according to claim 1 that is coated on the current collector.
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Classifications
Electric properties · CPC title
Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title
one phase coated with the other · CPC title
Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title
After-treatment · CPC title
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- What does patent US11569496B2 cover?
- A lithium-ion rechargeable battery negative electrode active material and a preparation method thereof, a lithium-ion rechargeable battery negative electrode plate, and a lithium-ion rechargeable battery are provided. The negative electrode active material includes a carbon core and a coating layer formed on a surface of the carbon core, a material of the coating layer includes amorphous carbon…
- Who is the assignee on this patent?
- Huawei Tech Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/366. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 31 2023 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).