Preparation method of glass fiber nonwoven fabric aramid coating diaphragm

A glass fiber and non-woven technology, which is applied to electrical components, circuits, battery pack components, etc., can solve the problems of excessive glass fiber non-woven pores, thermal shrinkage of diaphragms, and low mechanical strength of non-woven fabrics. The effect of improved thermal stability, good air permeability and high mechanical strength

Inactive Publication Date: 2019-03-29
HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problems to be solved by the present invention are the problem of excessively large pore size of the glass fiber non-woven fabric, the problem of low mechanical strength of the non-woven fabric and the problem of thermal shrinkage of the diaphragm

Method used

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  • Preparation method of glass fiber nonwoven fabric aramid coating diaphragm
  • Preparation method of glass fiber nonwoven fabric aramid coating diaphragm
  • Preparation method of glass fiber nonwoven fabric aramid coating diaphragm

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A kind of preparation method of glass fiber non-woven fabric aramid fiber coating diaphragm, comprises the following steps:

[0021] A. Preparation of aramid fiber slurry: by weight, take 6 parts of PMIA, 6 parts of alumina, 6 parts of methanol, and 6 parts of DMAC, heat and stir to dissolve, the dissolution temperature is 70 ° C, and mix evenly to obtain a mixture;

[0022] B. Preparation of the separator: the above mixture is coated on the glass fiber non-woven fabric by oil-based coating, and the aramid-coated separator is prepared through an extraction process.

[0023] Extraction process: 5 extraction tanks are set up, the extraction solvent is deionized water, and the extraction speed is 20m / min.

Embodiment 2

[0025] A kind of preparation method of glass fiber non-woven fabric aramid fiber coating diaphragm, comprises the following steps:

[0026] A. Preparation of aramid slurry: in parts by weight, take 10 parts of PMIA, 10 parts of alumina, 7 parts of propylene glycol, 8 parts of glycerin, and 15 parts of DMF, heat and stir to dissolve, and the dissolution temperature is 80 ° C. Mix Homogeneously, a mixture is obtained;

[0027] B. Preparation of the separator: the above mixture is coated on the glass fiber non-woven fabric by oil-based coating, and the aramid-coated separator is prepared through an extraction process.

[0028] Extraction process: set up 10 extraction tanks, the extraction solvent is ethanol, and the extraction speed is 60m / min.

Embodiment 3

[0030] A kind of preparation method of glass fiber non-woven fabric aramid fiber coating diaphragm, comprises the following steps:

[0031] A, the preparation of aramid fiber slurry: by weight, get 7 parts of PMIA, 8 parts of alumina, 3 parts of isoprene glycol, 4 parts of dipropylene glycol, 3 parts of tripropylene glycol, 4 parts of NMP, 4 parts of DMAC, 4 parts of DMF, heated and stirred to dissolve, the dissolution temperature is 90°C, mixed evenly to obtain a mixture;

[0032] B. Preparation of the separator: the above mixture is coated on the glass fiber non-woven fabric by oil-based coating, and the aramid-coated separator is prepared through an extraction process.

[0033] Extraction process: 7 extraction tanks are set up, the extraction solvent is acetone, and the extraction speed is 40m / min.

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PUM

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Abstract

A preparation method of a glass fiber nonwoven fabric aramid coating diaphragm belongs to the technical field of lithium ion battery diaphragms. The preparation method includes the following steps: A,preparation of aramid slurry: taking PMIA, alumina, dispersant and oil solvent at a certain ratio, heating and stirring the materials, dissolving the materials at 70-90 DEG C, and mixing the materials evenly to obtain a mixture; and B, preparation of a diaphragm: coating a piece of glass fiber nonwoven fabric with the mixture by means of oil coating, and obtaining an aramid coating diaphragm through an extraction process. The glass fiber nonwoven fabric aramid coating diaphragm prepared by the invention has better air permeability, higher mechanical strength and higher ionic conductivity, andcan improve the rate discharge and cycle performance of lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium battery separators, relates to an aramid-coated separator, in particular to a method for preparing a glass fiber non-woven aramid-coated separator, and the prepared glass fiber non-woven aramid-coated separator has better High air permeability, high mechanical strength, and high ionic conductivity can improve the rate discharge and cycle performance of lithium-ion batteries. Background technique [0002] The basic role of the battery separator in a lithium battery is to separate the positive and negative electrodes, and to absorb the electrolyte to allow lithium ions to pass through. 3C products include computers (Computer), communications (Communication) and consumer electronics (ConsumerElectronics), which are the main fields of lithium battery application. For lithium batteries of 3C products, only PP separator and PE separator are used, and its performance can be obtained. nice to meet. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M50/403H01M50/44
CPCH01M50/431H01M50/44H01M50/403H01M50/411Y02E60/10
Inventor 徐锋袁海朝贾亚峰苏碧海
Owner HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
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