公开(公告)号：US20230146812A1

公开(公告)日：2023-05-11

申请号：US18069989

申请日：2022-12-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shuqin LV ,  Xiaowei LI ,  Zhenxing PEI

IPC: H01M4/36 ,  H01M4/66

CPC classification number: H01M4/366 ,  H01M4/663 ,  H01M2004/027

Abstract: A negative electrode plate includes a negative electrode current collector and active material layers disposed on at least one surface of the negative electrode current collector. The active material layers include a first active material layer and a second active material layer disposed on a surface of the first active material layer. The first active material layer includes a first active material, the second active material layer includes a second active material, and the active material layers satisfy α×CW2≤CW1.




α
=


d
⁢
2


d
⁢
1






is a relative factor of layer spacings and 1≤α≤1.12. d1 and d2 are layer spacings corresponding to d002 peaks of the first and second active materials, respectively, in units of nm. CW1 and CW2 are masses per unit area of the first and second active material layers, respectively, in units of g/m2.