公开(公告)号：US20240387802A1

公开(公告)日：2024-11-21

申请号：US18774953

申请日：2024-07-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lianchuan Li ,  Rui Shen ,  Libing He

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/587

Abstract: Provided are a negative electrode plate and a preparation method thereof, a battery cell, a battery, and an electrical device. The negative electrode plate includes a current collector and a film layer disposed on the current collector. The film layer includes a first part and a second part disposed along a thickness direction of the film layer. The first part is disposed on the current collector. The second part is disposed on the first part. The first part includes a first active material. The second part includes a second active material. The first active material includes a first carbon-based material. The second active material includes a second carbon-based material containing a coating layer. A powder compaction density of the first active material is greater than a powder compaction density of the second active material.

公开(公告)号：US20230303396A1

公开(公告)日：2023-09-28

申请号：US18314832

申请日：2023-05-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lianchuan Li ,  Yuanyuan Li ,  Libing He ,  Rui Shen

IPC: C01B32/205 ,  H01M10/0525

CPC classification number: C01B32/205 ,  H01M10/0525 ,  C01P2006/11 ,  C01P2004/61 ,  C01P2006/40

Abstract: An artificial graphite and a preparation method thereof, a secondary battery containing the artificial graphite, and an electric apparatus are provided. The artificial graphite includes secondary particles and satisfies A≥0.5, where A is a ratio of a powder compacted density of the artificial graphite at 2 t pressure to a particle size by volume Dv1 of the artificial graphite. The secondary battery provided in this application can have low cyclic volume swelling while maintaining high energy density.