Isolation film, method for manufacturing the same, and secondary battery and power using device related thereto
By applying a coating of fibrous material and filler to the surface of a porous substrate, the problems of energy density and cycle performance in improving the thermal safety of secondary batteries are solved, achieving high heat resistance and high ion conductivity, reducing the risk of short circuits, and improving the overall performance of the battery.
CN119324294BActive Publication Date: 2026-05-29CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2022-12-05
- Publication Date
- 2026-05-29
Smart Images
Figure CN119324294B_ABST
Abstract
The present application provides an isolation film, a preparation method thereof, and a secondary battery and an electric device related thereto, the isolation film comprising a porous substrate and a coating layer provided on at least one surface of the porous substrate, the coating layer comprising fibrous matter and a filler, and the average pore area of the coating layer being smaller than the average pore area of the porous substrate in the thickness direction of the isolation film. The present application can make the secondary battery have high energy density, high thermal safety performance, and good cycle performance and kinetic performance.
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