一种隔离膜及其制备方法与化学电池
By attaching a nanofiber layer to the surface of a porous polyolefin separator, the problems of short circuits and poor wettability of polyolefin separators under extreme conditions are solved, resulting in a separator with high efficiency in liquid absorption and retention and good heat resistance, thus improving the overall performance of lithium-ion batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI ENERGY NEW MATERIALS TECHNOLOGY CO LTD
- Filing Date
- 2023-03-13
- Publication Date
- 2026-07-17
AI Technical Summary
Existing polyolefin separators are prone to causing internal short circuits in batteries under extreme conditions, and have poor wettability to electrolytes, affecting the performance and lifespan of lithium-ion batteries.
A nanofiber layer is attached to the surface of a porous polyolefin membrane using an electrospinning process. The high porosity of the nanofiber layer is formed by the combination of polyamide and PVA binder in the spinning solution, which enhances the mechanical strength and heat resistance of the membrane and improves the wettability of the electrolyte.
It improves the heat resistance of the separator and the liquid absorption and retention performance of the electrolyte, enhances the charge and discharge capacity and cycle performance of lithium-ion batteries, improves mechanical strength, shortens electrolyte diffusion time, and reduces thermal shrinkage rate.
Smart Images
Figure CN116207439B_ABST