公开(公告)号：US20200006756A1

公开(公告)日：2020-01-02

申请号：US16452543

申请日：2019-06-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Huafeng HUANG ,  Changliang SHENG ,  Cheng LI ,  Qisen HUANG

IPC: H01M4/1393 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/64

Abstract: The invention refers to negative electrode plate, preparation method thereof and electrochemical device. The negative electrode plate comprises: a negative current collector, a negative active material layer, and an inorganic dielectric layer which are provided in a stacked manner; the negative active material layer comprises opposite first surface and second surface, wherein the first surface is disposed away from the negative current collector; the inorganic dielectric layer is disposed on the first surface of the negative active material layer. The negative electrode plate provided by the application is useful in an electrochemical device, and can result in an electrochemical device having simultaneously excellent safety performance and cycle performance.

公开(公告)号：US20220209226A1

公开(公告)日：2022-06-30

申请号：US17697930

申请日：2022-03-18

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Cheng LI ,  Qisen HUANG ,  Xin LIU ,  Changliang SHENG ,  Shiwen WANG ,  Xianghui LIU ,  Jia PENG ,  Mingling LI ,  Chengdu LIANG

IPC: H01M4/38 ,  H01M4/583 ,  H01M4/66 ,  H01M4/04

Abstract: This application relates to a negative electrode plate, a secondary battery and apparatus thereof. The secondary battery of the present application comprises a negative electrode plate, the negative electrode plate comprises a composite current collector and a negative electrode active material layer disposed on at least one surface of the composite current collector, the negative electrode active material layer comprises a silicon-based active material, the silicon-based active material accounts for 0.5 wt % to 50 wt % of total mass of the negative electrode active material layer, and the composite current collector comprises a polymer support layer and a metal conductive layer disposed on at least one surface of the polymer support layer, and the composite current collector has a brittleness parameter C ranging from 0.03 to 0.5. The secondary battery and the negative electrode plate achieve good coordination between the current collector and the negative electrode active material layer.

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.