公开(公告)号：US20240339728A1

公开(公告)日：2024-10-10

申请号：US18621159

申请日：2024-03-29

申请人： Ningde Amperex Technology Limited

发明人： Changchuan XIONG ,  Bo FENG ,  Zengbin WEI

IPC分类号： H01M50/451 ,  H01M50/414 ,  H01M50/434 ,  H01M50/446

CPC分类号： H01M50/451 ,  H01M50/414 ,  H01M50/434 ,  H01M50/446

摘要： A separator includes a substrate and a ceramic coating layer disposed on at least one surface of the substrate. The ceramic coating layer includes a first filler, a second filler, and a binder. A mass ratio between the first filler, the second filler, and the binder is (88.5 to 99):(0.5 to 10):(0.5 to 1.5). An ionic impedance of the ceramic coating layer is 0.001 Ω to 0.15 Ω. The separator based on the above settings exhibits a relatively low ionic impedance, indicating that the kinetic performance of the separator is improved. The separator as applied in an electrochemical device improves the kinetic performance of the electrochemical device.

公开(公告)号：US20240079727A1

公开(公告)日：2024-03-07

申请号：US18476840

申请日：2023-09-28

申请人： Ningde Amperex Technology Limited

发明人： Bo FENG

IPC分类号： H01M50/449 ,  H01M10/0525 ,  H01M50/42 ,  H01M50/426 ,  H01M50/443 ,  H01M50/451 ,  H01M50/457 ,  H01M50/46 ,  H01M50/491

CPC分类号： H01M50/449 ,  H01M10/0525 ,  H01M50/42 ,  H01M50/426 ,  H01M50/443 ,  H01M50/451 ,  H01M50/457 ,  H01M50/46 ,  H01M50/491

摘要： A separator includes a substrate and a first coating layer provided on at least one surface of the substrate. The first coating layer includes a first polymer. The number of particles with a maximum length of 10 μm to 30 μm in the first polymer in any area of 250 μm*200 μm on a surface of the first coating layer is 10 to 30. The separator provided by this application has good interface adhesion performance and improves the structural stability of the lithium-ion battery, so that the lithium-ion battery has better charge and discharge performance, especially rate performance and cycle performance under low temperature.