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A lithium battery power battery high temperature resistant microporous film material and preparation method thereof

A technology of microporous thin film and power battery, which is applied in the field of membrane materials, can solve the problems of reduced safety of lithium-ion batteries, poor electrolyte infiltration performance, and influence on battery cycle performance, and achieve good adsorption effect, good dispersion and uniform pore diameter. small effect

Active Publication Date: 2021-12-03
SHENZHEN LICHANGSHI ADHESIVE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, lithium-ion battery separators are mainly polyolefin films. The limitations of this separator material are: limited temperature resistance, usually lower than 150°C, which reduces the safety of lithium-ion batteries; poor wettability and retention of electrolyte , thereby affecting the cycle performance of the battery. This type of diaphragm has a large static electricity and is likely to cause a short circuit in the battery during the battery manufacturing process. Therefore, it is not suitable as a lithium-ion power battery diaphragm for electric vehicle applications.

Method used

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  • A lithium battery power battery high temperature resistant microporous film material and preparation method thereof

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Embodiment 1

[0022] A high-temperature-resistant microporous film material for a lithium battery power battery. The raw materials include 7.5 parts by mass of polyphenylene sulfide, 25 parts of polypropylene, 2.5 parts of polysilicone, and 0.4 parts of 1,8-diaminonaphthalene. 0.2 parts of hydroquinone, 7.5 parts of mesoporous carbon, 0.75 parts of tricalcium phosphate fine powder, 3 parts of simethicone, 30 parts of paraffin oil, 0.15 parts of heat stabilizer, 0.15 parts of antioxidant .

[0023] The average pore diameter of the mesoporous carbon is 2nm, and the mesoporous carbon is amorphous mesoporous carbon. The thermal stabilizer is tridecyl phosphite. The antioxidant is antioxidant 1010.

[0024] A method for preparing a high-temperature-resistant microporous film material for a lithium battery power battery, comprising the following steps:

[0025] (1) Pour mesoporous carbon, tricalcium phosphate micropowder, simethicone oil, and paraffin oil into a blender, heat to 80°C, mix and ...

Embodiment 2

[0031] A high-temperature-resistant microporous film material for a lithium battery power battery. The raw materials include 5 parts by mass of polyphenylene sulfide, 30 parts of polypropylene, 2 parts of polysilicone, and 0.6 parts of 1,8-diaminonaphthalene. 0.1 parts of hydroquinone, 10 parts of mesoporous carbon, 0.5 parts of tricalcium phosphate fine powder, 4 parts of simethicone, 20 parts of paraffin oil, 0.2 parts of heat stabilizer, 0.1 parts of antioxidant .

[0032] The preparation method of embodiment 2 is identical with embodiment 1.

Embodiment 3

[0034] A high-temperature-resistant microporous film material for a lithium battery power battery. The raw materials include 10 parts by mass of polyphenylene sulfide, 20 parts of polypropylene, 3 parts of polysilicone, and 0.2 parts of 1,8-diaminonaphthalene. 0.3 parts of hydroquinone, 5 parts of mesoporous carbon, 1 part of tricalcium phosphate fine powder, 2 parts of simethicone oil, 40 parts of paraffin oil, 0.1 part of heat stabilizer, 0.2 part of antioxidant .

[0035] The preparation method of embodiment 3 is identical with embodiment 1.

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Abstract

The invention provides a high temperature resistant microporous film material for lithium battery power batteries, the raw materials of which include polyphenylene sulfide, polypropylene, polysiloxane, 1,8-diaminonaphthalene, hydroquinone, mesoporous carbon, triphosphate calcium fine powder, dimethicone, paraffin oil, heat stabilizer, antioxidant; the ratio of the polyphenylene sulfide, polypropylene, and polysilicon is 5-10:20-30:2-3; Porous carbon, tricalcium phosphate powder, dimethyl silicone oil, and paraffin oil are fully mixed and evenly mixed, heated and stirred to make a paste before use. The high temperature resistant microporous film material of the lithium battery power battery of the invention has the characteristics of high temperature resistance and corrosion resistance, and has high porosity and uniform pores.

Description

technical field [0001] The invention belongs to the field of membrane materials, and in particular relates to a high-temperature-resistant microporous membrane material for a lithium battery power battery and a preparation method thereof. Background technique [0002] Due to the advantages of high specific energy, long cycle life, and no memory effect, lithium-ion batteries have developed rapidly in recent years, especially with the successful application of lithium-ion power batteries in electric vehicles, the development speed has reached unprecedented. However, the safety of lithium-ion power batteries has always been a key issue restricting its development, and the diaphragm is a key component related to the safety of lithium-ion power batteries. The separator is an electrically insulating film with a porous structure. Its main function is to isolate the positive and negative electrodes, prevent the electrons in the battery from freely passing through, and at the same ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/446H01M50/403H01M50/406B29C48/08B29C55/14B29C71/00
CPCB29C71/0009B29C2071/0027B29C48/0018B29C48/0022B29C48/08H01M50/403H01M50/446Y02E60/10
Inventor 王益刚黄伟
Owner SHENZHEN LICHANGSHI ADHESIVE PROD
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