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
US12341189B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12341189-B2 |
| Application number | US-202218147609-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 28, 2022 |
| Priority date | Dec 18, 2015 |
| Publication date | Jun 24, 2025 |
| Grant date | Jun 24, 2025 |
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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 disclosed. 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: (1) a carbon core; and (2) a coating layer formed over a surface of the carbon core, wherein the coating layer is of a double-layer structure comprises a doped layer and an amorphous carbon layer, the coating layer formed on the surface of the carbon core, wherein the doped layer comprises amorphous carbon and a doping element, wherein the doping element comprises nitrogen, wherein the doping element further comprises any one or a mixture of phosphorus, sulfur, oxygen, and chlorine, and wherein the amorphous carbon layer is the outermost layer, of the double-layer structure. 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 a 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 a mass content of the coating layer in the entire negative electrode active material is 0.1% to 30%, and a mass content of the doping element in the coating layer is 0.1% to 20%. 4. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein a thickness of the doping layer is 0.1 μm to 10 μm. 5. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein the doping element further comprises. 6. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein a material of the carbon core comprises at least one of natural graphite, artificial graphite, expanded graphite, graphite oxide, hard carbon, soft carbon, graphene, carbon nanotube, or carbon fiber. 7. A lithium-ion rechargeable battery negative electrode plate comprising: (a) a current collector and (b) a lithium-ion rechargeable battery negative electrode active material that is coated on the current collector, wherein the lithium-ion rechargeable battery negative electrode active material comprises: (1) a carbon core; and (2) a coating layer formed over a surface of the carbon core, wherein the coating layer is of a double-layer structure comprising comprises a doped layer and an amorphous carbon layer, the coating layer formed on the surface of the carbon core, wherein the doped layer comprises amorphous carbon and a doping element, wherein the doping element comprises nitrogen, wherein the doping element further comprises any one or a mixture of phosphorus, sulfur, oxygen, and chlorine, and wherein the amorphous carbon layer is the outermost layer of the double-layer structure. 8. A lithium-ion rechargeable battery comprising: (a) a lithium-ion rechargeable battery negative electrode plate, (b) a positive electrode plate, (c) a separator, (d) a non-aqueous electrolyte, and (e) an enclosure, wherein the lithium-ion rechargeable battery negative electrode plate comprises (i) a current collector and (ii) a lithium-ion rechargeable battery negative electrode active material that is coated on the current collector, wherein the lithium-ion rechargeable battery negative electrode active material comprises: (1) a carbon core; and (2) a coating layer formed over a surface of the carbon core, wherein the coating layer is of a double-layer structure comprising comprises a doped layer and an amorphous carbon layer, the coating layer formed on the surface of the carbon core, wherein the doped layer comprises amorphous carbon and a doping element, wherein the doping element comprises nitrogen, wherein the doping element further comprises any one or a mixture of phosphorus, sulfur, oxygen, and chlorine, and wherein the amorphous carbon layer is the outermost layer of the double-layer structure. 9. The lithium-ion rechargeable battery negative electrode plate according to claim 7 , 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%. 10. The lithium-ion rechargeable battery negative electrode plate according to claim 7 , wherein a mass content of the coating layer in the entire negative electrode active material is 0.1% to 30%, and a mass content of the doping element in the coating layer is 0.1% to 20%. 11. The lithium-ion rechargeable battery negative electrode plate according to claim 7 , wherein a thickness of the doping layer is 0.1 μm to 10 μm. 12. The lithium-ion rechargeable battery according to claim 8 , 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%. 13. The lithium-ion rechargeable battery according to claim 8 , wherein a mass content of the coating layer in the entire negative electrode active material is 0.1% to 30%, and a mass content of the doping element in the coating layer is 0.1% to 20%. 14. The lithium-ion rechargeable battery according to claim 8 , wherein a thickness of the doping layer is 0.1 μm to 10 μm. 15. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein the doping layer comprises element carbon provided by pyrrole or pyridine. 16. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein a thickness of the amorphous carbon layer is 3 μm to 8 μm. 17. The lithium-ion rechargeable battery negative electrode active material according to claim 1 , wherein a mass content of the amorphous carbon in the entire negative electrode active material is 0.1% to 30%. 18. The lithium-ion rechargeable battery negative electrode plate according to claim 7 , wherein the doping layer comprises element carbon provided by pyrrole or pyridine. 19. The lithium-ion rechargeable battery according to claim 8 , wherein the doping layer comprises element carbon provided by pyrrole or pyridine. 20. The lithium-ion rechargeable battery according to claim 8 , wherein a thickness of the amorphous carbon layer is 3 μm to 8 μm.
Assignees
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Classifications
Negative electrodes · CPC title
Electric properties · CPC title
one phase coated with the other · CPC title
one element only · CPC title
Amorphous compounds · CPC title
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- What does patent US12341189B2 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 disclosed. 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 carbo…
- 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 Jun 24 2025 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).