公开(公告)号：US20200006776A1

公开(公告)日：2020-01-02

申请号：US16375531

申请日：2019-04-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yaru ZHOU ,  Qingrui XUE ,  Zige ZHANG ,  Miao JIANG ,  Jing LI ,  Wei LI ,  Long WANG

IPC: H01M4/66 ,  H01M4/70 ,  H01M2/26

Abstract: The present disclosure relates to a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, a conductive structure, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer includes a main body portion and a protrusion portion. A surface of the main body portion facing away from the insulating layer is covered by the active material layer, while a surface of the protrusion portion facing away from the insulating layer is uncovered by the active material layer. The conductive structure is welded to the protrusion portion and thus a welded zone is formed. The first protective layer has elasticity, and is disposed on a side of the protrusion portion facing away from the insulating layer and is located between the welded zone and the active material layer.

公开(公告)号：US20180323436A1

公开(公告)日：2018-11-08

申请号：US15968654

申请日：2018-05-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yujun CHEN ,  Xinliang KUANG ,  Long WANG ,  Na LIU ,  Huan NI

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  B01J13/08 ,  H01M10/0525

CPC classification number: H01M4/628 ,  B01J13/08 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/622 ,  H01M4/624 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present disclosure provides a modified positive electrode active material. The modified positive electrode active material comprises a positive electrode active material inner core; a metal oxide layer comprising a metal oxide and coated on a surface of the positive electrode active material inner core; and a polymer layer comprising a polymer and coated on a surface of the metal oxide layer, the polymer being one or more selected from a group consisting of polyacrylic acid, polymethyl methacrylate, polyacrylamide and lithium polyacrylate. The modified positive electrode active material of the present disclosure has better structure stability and thermal stability, when the modified positive electrode active material is applied in the electrochemical energy storage device, cycle performance and safety performance of the electrochemical energy storage device can be significantly improved without decreasing energy density of the electrochemical energy storage device.