公开(公告)号：US20220384861A1

公开(公告)日：2022-12-01

申请号：US17816426

申请日：2022-07-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bobing Hu ,  Shengyuan Huang ,  Chengyong Liu ,  Jiawei Fu ,  Xiaoning He ,  Jieliang Zou ,  Chengbin Zhong

IPC: H01M10/42 ,  H01M4/62 ,  H01M4/38 ,  H01M4/134 ,  H01M4/1395 ,  H01M10/052

Abstract: A negative-electrode plate, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an electric apparatus including such negative-electrode plate are provided. The negative-electrode plate includes an alkali metal layer and a polymer film layer provided on at least one surface of the alkali metal layer. Surface resistivity of the polymer film layer gradually increases in a thickness direction of the polymer film layer away from the alkali metal layer. When the negative-electrode plate is used in a secondary battery, lithium dendrites can be effectively inhibited.

公开(公告)号：US20220367877A1

公开(公告)日：2022-11-17

申请号：US17810644

申请日：2022-07-05

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Ang Fu ,  Chengyong Liu ,  Yongsheng Guo ,  Jiawei Fu ,  Qian Li ,  Bobing Hu ,  Shengyuan Huang

IPC: H01M4/66 ,  H01M4/04 ,  H01M10/052 ,  H01M4/80

Abstract: This application provides a polymer current collector, a preparation method thereof, and a secondary battery, battery module, battery pack, and apparatus associated therewith. The polymer current collector provided in this application includes polymer film layers, where the polymer film layers include a first polymer film layer and a second polymer film layer, a resistivity of the first polymer film layer is denoted as ρ1, a resistivity of the second polymer film layer is denoted as ρ2, and the current collector satisfies ρ1>ρ2. The polymer current collector in this application can induce to deposit of lithium metal from a low conductivity side to a high conductivity side, avoiding risks of depositing lithium ions on the surface of the current collector and thereby increasing cycle life of lithium metal batteries.