Separator with excellent adhesion and air permeability and preparation method thereof

A gas-permeable and cohesive technology, applied in the direction of separators/films/diaphragms/spacers, structural parts, electrical components, etc., can solve the problems of poor comprehensive performance of the diaphragm, achieve a small cross-overlapping range, and ensure adhesion direct effect, the effect of ensuring uniformity
CN114094283BActive Publication Date: 2022-04-08JIANGSU ADVANCED MATERIAL TECH CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU ADVANCED MATERIAL TECH CO LTD
Publication Date
2022-04-08

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Abstract

The invention relates to the technical field of lithium batteries, in particular to a separator with excellent adhesiveness and gas permeability and a preparation method thereof, comprising: a base film and an adhesive layer, the adhesive layer is arranged on at least one surface of the base film, and the adhesive The junction layer includes several hollow structures, and each hollow structure is fixed on the surface of the base film. The hollow structure is surrounded by raised parts, and the inside surrounded by the raised parts is the hollow part. The separator with excellent cohesiveness and air permeability and the preparation method thereof of the present invention maintain the thermal shrinkage performance of the ceramic coated separator, satisfy the bonding strength between the separator and the pole piece through a relatively low glue content, and maintain It ensures the good air permeability of the separator and improves the overall performance of the battery.
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Description

technical field

[0001] The invention relates to the technical field of lithium batteries, in particular to a separator with excellent adhesion and gas permeability and a preparation method thereof. Background technique

[0002] Lithium-ion batteries generally include a positive electrode, a negative electrode, a separator, and an electrolyte. As a key component, the diaphragm can prevent the short circuit of the positive and negative electrodes of the lithium-ion battery, provide a channel for transporting ions, and block the transmission of lithium ions through closed cells under uncontrolled conditions to prevent accidents. Therefore, the research on improving the safety, usability, and manufacturability of lithium-ion batteries by improving the performance of the separator has received more and more attention.

[0003] In the case of manufacturing rechargeable lithium batteries, if the electrodes are not properly bonded to the separator, the positive and negative electro...

Claims

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