公开(公告)号：US20230299277A1

公开(公告)日：2023-09-21

申请号：US18324419

申请日：2023-05-26

Applicant: Ningde Amperex Technology Limited

Inventor： Wenbo JIN ,  Jiali DONG ,  Lihong HE ,  Yuansen XIE

IPC: H01M4/36 ,  H01M10/0525 ,  H01M10/0566

CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M10/0566 ,  H01M2004/021

Abstract: An electrochemical apparatus includes an electrolyte and a negative electrode plate. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector. The negative electrode active material layer contains a negative electrode active material, and a tortuosity T of the negative electrode active material layer satisfies the following relation: 1

公开(公告)号：US20230052908A1

公开(公告)日：2023-02-16

申请号：US17971811

申请日：2022-10-24

Applicant: Ningde Amperex Technology Limited

Inventor： Wenbo JIN ,  Jiali DONG ,  Lihong HE ,  Yuansen XIE

IPC: H01M4/583 ,  H01M4/04

Abstract: A negative electrode active material includes a carbon material, where the carbon material has a specific degree of graphitization and aspect ratio distribution. A degree of graphitization Gr of the carbon material measured by an X-ray diffraction analysis method is 0.82 to 0.92, and based on a total quantity of particles of the carbon material, a proportion of particles with an aspect ratio greater than 3.3 in the carbon material is less than 10%. The negative electrode active material helps to improve cycle performance of the electrochemical apparatus. FIG. 1.

公开(公告)号：US20240030439A1

公开(公告)日：2024-01-25

申请号：US18374731

申请日：2023-09-29

Applicant: Ningde Amperex Technology Limited

Inventor： Wenbo JIN ,  Jiali DONG

IPC: H01M4/587 ,  C01B32/20 ,  H01M4/133

CPC classification number: H01M4/587 ,  C01B32/20 ,  H01M4/133 ,  C01B2204/22 ,  C01P2004/03 ,  C01P2006/17 ,  C01P2006/10 ,  C01P2004/51 ,  C01B2204/32 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/027

Abstract: A negative electrode material includes a carbonaceous active material. Observed in a 80 μm×100 μm region of an SEM image, the carbonaceous active material includes carbonaceous particles with pores. A proportion of a quantity of the carbonaceous particles with a quantity of the pores of N≤2 in a total quantity of the carbonaceous particles in the 80 μm×100 μm region is ≤60%, and a proportion of a quantity of the carbonaceous particles with a quantity of the pores of 3≤N≤5 in the total quantity of carbonaceous particles in the 80 μm×100 μm region is ≤30%.