公开(公告)号：US11901561B2

公开(公告)日：2024-02-13

申请号：US18069067

申请日：2022-12-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Quanguo Li ,  Yonghuang Ye ,  Songjun Shi ,  Qian Liu ,  Jun Peng ,  Fajun Huang

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M4/02

CPC classification number: H01M4/628 ,  H01M4/505 ,  H01M4/525 ,  H01M4/623 ,  H01M4/625 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode sheet includes a current collector including a coating region and a non-coating region, a resistance layer disposed on the current collector and including a conductive agent, a first binder, and a first positive electrode active material, and a positive electrode active material layer including a second positive electrode active material, a conductive agent, and a second binder. A resistance of the resistance layer is greater than a resistance of the positive electrode active material layer. In a cross section of the positive electrode sheet, a projection of at least a part of the positive electrode active material layer on the current collector and a projection of the resistance layer on the current collector do not overlap. A polarization parameter P of the positive electrode sheet is in a range of 0.4-65.0 and equals ((1−S)/S)·(R1/R2).