公开(公告)号：US11777085B2

公开(公告)日：2023-10-03

申请号：US17057290

申请日：2020-04-07

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shitong Chen ,  Bin Xie ,  Zhijie Gong ,  Zhao Hu ,  Lin Ma

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M2004/027

Abstract: The application relates to the field of lithium ion battery technology and, more particularly, relates to a lithium-supplement layer and its negative electrode sheet, a lithium ion battery and a device. The lithium-supplement layer is formed by connecting a transition layer, an oxide layer and a surface layer in sequence, the surface layer contains an appropriate amount of an organic material and a filling substance, which can reduce a winding temperature of the negative electrode sheet, the oxide layer substance in the lithium-supplement layer is used to provide an additional lithium source, after injection, the lithium source can be continuously supplemented during the cycle process to improve the activity of a lithium layer, at the same time, the filling substance contained in the surface layer can effectively play a role of restraining the expansion of an active substance, and improve the battery cycle performance.