	US 12,224,442 B2
	Graphite composite negative electrode material, preparation method therefor and application thereof
Xiaofeng Zhao, Changzhou (CN); Jing Liu, Changzhou (CN); and Hongxin Yang, Changzhou (CN)
Assigned to SVOLT ENERGY TECHNOLOGY CO., LTD., Jiangsu (CN)
Appl. No. 18/724,125
Filed by SVOLT ENERGY TECHNOLOGY CO., LTD., Jiangsu (CN)
PCT Filed Jul. 20, 2022, PCT No. PCT/CN2022/106714 § 371(c)(1), (2) Date Jun. 25, 2024, PCT Pub. No. WO2023/124025, PCT Pub. Date Jul. 6, 2023.
Claims priority of application No. 202111629432.5 (CN), filed on Dec. 28, 2021.
Prior Publication US 2024/0421306 A1, Dec. 19, 2024
Int. Cl. H01M 4/583 (2010.01); C01B 32/205 (2017.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01)

CPC H01M 4/583 (2013.01) [C01B 32/205 (2017.08); H01M 4/0419 (2013.01); H01M 4/0421 (2013.01); H01M 4/0471 (2013.01); H01M 4/366 (2013.01); H01M 10/0525 (2013.01); C01P 2004/61 (2013.01); C01P 2006/11 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)]

16 Claims

1. A graphite composite negative electrode material, the graphite composite negative electrode material comprises a core and a coating layer which is coated on the surface of the core, the core comprises graphite material, and the coating layer comprises titanium niobate, carbon nanotubes, and amorphous carbon; and

the graphite composite negative electrode material is prepared by the following methods, which comprises:

(1) mixing a titanium source, a niobium source, an asphalt and a solvent, spray drying and sintering to obtain a pre-coating material;

(2) mixing the pre-coating material in step (1) with a solution of a metal catalyst to obtain a mixture, and compositing a carbon source with the mixture in a manner of vapor deposition to obtain a coating layer material; and

(3) mixing the coating layer material in step (2) with a graphite material, granulating, and carbonizing to obtain the graphite composite negative electrode material.