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Lithium-ion battery diaphragm coated with aramid composite and preparation method thereof

A lithium ion battery and aramid fiber technology is applied in the field of aramid fiber composite coated lithium ion battery separator and its preparation field, and achieves the effects of improved wettability, good high temperature resistance and environmental protection

Active Publication Date: 2020-10-30
刘桥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to overcome the above-mentioned problems existing in the prior art, and provides an aramid composite coated lithium-ion battery separator and a preparation method thereof, which have better high temperature resistance and no environmental pollution problems

Method used

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  • Lithium-ion battery diaphragm coated with aramid composite and preparation method thereof
  • Lithium-ion battery diaphragm coated with aramid composite and preparation method thereof

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and examples, and the contents of the examples are not intended to limit the protection scope of the present invention.

[0032] The invention relates to a lithium-ion battery diaphragm coated with an aramid fiber composite. Similar to the Chinese invention patent with application number 201510457866.X, the aramid composite coated lithium-ion battery separator of the present invention also includes a lithium-ion battery base film and a coating coated on one or both sides of the base film. And, preferably, the lithium-ion battery base film is a polyethylene-based film, a polypropylene-based film, a polypropylene / polyethylene / polypropylene composite base film, a poly One of imide base film, polyvinylidene fluoride base film, polyethylene non-woven fabric base film, polypropylene non-woven fabric base film and polyimide non-woven fabric base film.

[0033] Unlike the coatin...

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Abstract

The invention relates to a lithium-ion battery separator coated with aramid fibers and a preparation method thereof. The separator includes a lithium-ion battery base film and a coating coated on one or both sides of the base film, and the coating is made of aramid The aramid composite slurry is obtained after coating, steam preheating, and hot air drying. The composition and weight ratio of the aramid composite slurry are: aramid polymer: 5-20%; solvent: 80-90%; Adhesive: 0~8%. The aramid coated separator of the present invention has good mechanical properties and high temperature resistance. At the same time, the separator has an open pore structure, which greatly improves the wettability of the electrolyte. In addition, it is environmentally friendly and low in cost. , Simple process, convenient for continuous production and so on.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a lithium ion battery diaphragm and a preparation method thereof, in particular to an aramid composite coated lithium ion battery diaphragm and a preparation method thereof. Background technique [0002] Lithium-ion batteries are widely used as power sources for various mobile devices due to their high energy density, high operating voltage, no memory effect, and long cycle life. Lithium-ion batteries generally include a positive electrode, a negative electrode, a separator, and an electrolyte. As a barrier between the positive and negative electrodes, the diaphragm plays a vital role in the performance of lithium-ion batteries. Therefore, the research on improving the safety, usability, and manufacturability of lithium-ion batteries by improving the performance of the diaphragm is receiving more and more attention. Much attention. [0003] At present, the separator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/0525C09D177/00C09D7/20C09D7/65C09D4/02C09D4/06H01M50/403H01M50/44H01M50/449H01M50/457
CPCH01M10/0525C09D177/00C09D4/06H01M50/411H01M50/44H01M50/403H01M50/449C08L27/16Y02E60/10
Inventor 刘桥
Owner 刘桥