公开(公告)号：US20220085379A1

公开(公告)日：2022-03-17

申请号：US17536103

申请日：2021-11-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin LIU ,  Shiwen WANG ,  Qisen HUANG ,  Cheng LI ,  Mingling Ll ,  Jia PENG ,  Xianghui LIU

IPC: H01M4/66 ,  H01M4/36 ,  H01M10/0525

Abstract: The present application discloses a positive electrode current collector, a positive electrode plate, an electrochemical device, and an apparatus. The positive electrode current collector includes a polymer material-based support layer and an aluminum-based conductive layer disposed on at least one surface of the support layer; a thickness D1 of the aluminum-based conductive layer, a tensile strength T of the support layer, and a thickness D2 of the support layer satisfy a relational formula 0.01≤(200×D1)/(T×D2)≤0.5, in the formula D1 and D2 are in the same unit, and T is in MPa. The positive electrode current collector has relatively high mechanics and mechanical properties, good electrical conductivity and current collection performance and low weight, which can improve preparation yield of the positive electrode current collector, the positive electrode plate and the electrochemical device and their reliability during use.