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Production process of high-quality lithium battery separator

A lithium battery separator and manufacturing process technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of insufficient liquid absorption and moisturizing ability to meet the requirements for use, poor mechanical properties, etc., and achieve improved mechanical strength and moisture absorption characteristics. The effect of long service life, great promotion value and market competitiveness

Active Publication Date: 2018-02-16
盐城盐聚电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the polyolefin porous membrane inherently has extremely excellent resistance to electrolyte corrosion, and has good chemical and electrochemical stability, but when it is used as a lithium battery separator, its mechanical properties are poor, and the surface absorbs liquid Moisturizing ability often cannot meet the requirements of use, and needs to be continuously improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A manufacturing process of a high-quality lithium battery diaphragm, comprising the following steps:

[0028] (1) Preparation of functional granular fillers:

[0029] a. Put 3 parts of cocamidopropyl amine oxide, 5 parts of lauryl amidopropyl amine oxide, 42 parts of absolute ethanol, 2.5 parts of ammonia water, and 105 parts of water into the reactor in corresponding parts by weight, and heat to keep the reaction The temperature in the kettle was 40°C, and the mixture A was obtained after continuous stirring for 20 minutes;

[0030] b. Add tetraethyl orthosilicate which is 6.5 times the total mass of mixture A to the reaction kettle treated in operation a, heat to keep the temperature in the reaction kettle at 36°C, and keep stirring for 12 minutes to obtain mixture B for later use;

[0031] c. Add a composite solution of 9% of the total mass of mixture B to the reactor after operation b, then heat to keep the temperature in the reactor at 50°C, and obtain mixture C a...

Embodiment 2

[0046] A manufacturing process of a high-quality lithium battery diaphragm, comprising the following steps:

[0047] (1) Preparation of functional granular fillers:

[0048] a. Put 5 parts of cocamidopropyl amine oxide, 6 parts of lauryl amidopropyl amine oxide, 44 parts of absolute ethanol, 3 parts of ammonia water, and 108 parts of water into the reactor in corresponding parts by weight, and heat to keep the reaction The temperature in the kettle was 42°C, and the mixture A was obtained after continuous stirring for 23 minutes;

[0049] b. Add tetraethyl orthosilicate which is 8 times the total mass of mixture A to the reaction kettle treated in operation a, heat to keep the temperature in the reaction kettle at 38°C, and keep stirring for 14 minutes to obtain mixture B for later use;

[0050] c. Add a composite solution of 11% of the total mass of mixture B to the reactor after operation b, then heat to keep the temperature in the reactor at 52°C, and obtain mixture C afte...

Embodiment 3

[0065] A manufacturing process of a high-quality lithium battery diaphragm, comprising the following steps:

[0066] (1) Preparation of functional granular fillers:

[0067] a. Put 6 parts of cocamidopropyl amine oxide, 7 parts of lauryl amidopropyl amine oxide, 46 parts of absolute ethanol, 4.5 parts of ammonia water, and 110 parts of water into the reactor in corresponding parts by weight, and heat to keep the reaction The temperature in the kettle was 43°C, and the mixture A was obtained after continuous stirring for 25 minutes;

[0068] b. Add tetraethyl orthosilicate which is 8.5 times the total mass of mixture A to the reaction kettle treated in operation a, heat to keep the temperature in the reaction kettle at 40°C, and keep stirring for 16 minutes to obtain mixture B for later use;

[0069] c. Add a composite solution of 13% of the total mass of mixture B to the reactor after operation b, then heat to keep the temperature in the reactor at 53°C, and obtain mixture C ...

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Abstract

The invention discloses a production process of a high-quality lithium battery separator. The production process comprises the following steps: (1) preparing functional particle filler; (2) raw material mixing; (3) hot-press molding. A preparation method of the separator is improved specially, so that integrated quality of the separator is improved, mechanical strength and moisture absorption characteristic of the separator are improved, and the separator is long in service life and has great promotional value and market competitiveness.

Description

technical field [0001] The invention belongs to the technical field of lithium battery processing and manufacturing, and in particular relates to a manufacturing process of a high-quality lithium battery diaphragm. Background technique [0002] In the structure of lithium batteries, the separator is one of the key inner components. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. A separator with excellent performance can play an important role in improving the overall performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery, prevent the two electrodes from contacting and short circuit, and also have the function of allowing electrolyte ions to pass through. The separator material is non-conductive, and its physical and chemical properties have a great influence o...

Claims

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Application Information

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IPC IPC(8): H01M2/14H01M50/403H01M50/446H01M50/449H01M50/489
CPCH01M50/403Y02E60/10
Inventor 赵小亮
Owner 盐城盐聚电子有限公司
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