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High-temperature resistant micropore thin film material and application thereof

A technology of microporous film and high temperature resistance, which is applied in the direction of electrical components, circuits, battery pack components, etc., can solve the problems of poor liquid absorption and liquid retention capacity, poor high temperature resistance, low mechanical strength, etc., to reduce battery life. Effects of internal resistance, improved safety performance, and large specific surface area

Active Publication Date: 2014-07-16
莱州联友金浩新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of poor high temperature resistance, low mechanical strength, poor liquid absorption and liquid retention capacity, low porosity, and high static electricity of the diaphragm material in the prior art, and provide a high temperature resistant, antistatic, high porosity High-temperature-resistant microporous film material with high efficiency, high liquid retention capacity, and excellent electrolyte absorption performance, which can be used as a lithium-ion power battery diaphragm, a supercapacitor diaphragm or a filter material

Method used

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  • High-temperature resistant micropore thin film material and application thereof

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Effect test

Embodiment 1

[0025] The fiber and inorganic powder materials are compounded according to weight ratio: ceramic fiber diameter is 0.6μm, length 5mm; PET fiber diameter is 3μm, length 6mm; cellulose fiber diameter is 0.3μm, length 3mm; the required weight of nano zirconia powder 90% of the above fibers and zirconia nano-powders are made by wet papermaking process, after beating, molding, dehydration, and then coated with a coating solution prepared by zirconia powder and PVDF, rolling, drying, pressing Rolled to make a thickness of 30μm and a surface density of 20g / m 2 A high-temperature-resistant microporous film material, in which the content of various materials is: 32% ceramic fiber, 45% PET fiber, 10% cellulose fiber, 6% nano-zirconia powder, and 7% PVDF.

Embodiment 2

[0027] The fiber and inorganic powder materials are compounded according to the weight ratio: that is, the ultrafine glass fiber has a diameter of 0.6 μm and a length of 5 mm; PET fiber has a diameter of 3 μm and a length of 6 mm; cellulose fiber has a diameter of 0.3 μm and a length of 3 mm; 90% of the weight is required. The above-mentioned fibers and alumina nano-powder are made by wet papermaking process, beaten, shaped, dehydrated, and then coated with a coating solution prepared from alumina powder and acrylate, rolled, and baked. Dry, rolled, the thickness is 45μm, the surface density is 25g / m 2 A high-temperature-resistant microporous film material, in which the content of various materials is: 30% ultrafine glass fiber, 40% PET fiber, 12% cellulose fiber, 8% nano-alumina powder, and 10% acrylate.

Embodiment 3

[0029] The fiber and inorganic powder materials are compounded according to the weight ratio: that is, the diameter of alumina fiber is 0.6 μm, and the length is 5 mm; the diameter of PET fiber is 3 μm, and the length is 6 mm; the diameter of cellulose fiber is 0.3 μm, and the length is 3 mm; 90% by weight, the above-mentioned fiber and magnesium oxide nano-powder adopt wet papermaking process, after beating, forming, dehydration, and then use the coating solution prepared by magnesium oxide powder and cellulose binder to coat, rolling, in Drying, rolling, the thickness is 60μm, the surface density is 36g / m 2 A high-temperature-resistant microporous film material, in which the content of various materials is: 31% alumina fiber, 48% PET fiber, 10% cellulose fiber, 5% nano-magnesia powder, and 6% cellulose binder.

[0030] Using the above batching conditions and treatment methods, the performance indicators of the prepared high temperature resistant microporous film material are...

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Abstract

The invention relates to a high-temperature resistant micropore thin film material prepared from inorganic fiber, synthetic fiber, natural organic fiber, nano-grade inorganic powder and an adhesive. The thin film material is a non-woven fabric material prepared through one-step molding with a wet papermaking technology combined with a coating technology. The material has a 3-dimensional network structure and porosity higher than 90%. The high-temperature resistant micropore thin film material has an outstanding high-temperature resistance. Under a temperature of 260 DEG C, excellent dimension and structure stabilities of the material are maintained for a long time. The material has excellent liquid absorbency, excellent liquid retaining capacity, and 3-dimensional stereo pores with good uniformity. An average pore size is 0.02-2.5mum. The high-temperature resistant micropore thin film material can be used as lithium ion power battery separation films, super-capacitor separation films, or filtrating materials.

Description

technical field [0001] The invention relates to the preparation and application of a novel material; in particular, it relates to a high-temperature-resistant microporous film material and its application. 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 time allow the electrolyte ions to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16
CPCY02E60/10
Inventor 方开东徐继亮
Owner 莱州联友金浩新型材料有限公司
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