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A kind of preparation method of separator for high-strength lithium-ion battery

A lithium-ion battery, high-strength technology, applied to battery components, circuits, electrical components, etc., can solve the problems of low physical properties and high conductivity of polymer separators, and achieve the effect of decreased conductivity and increased strength

Active Publication Date: 2017-11-03
中材锂膜(常德)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: the physical performance of the polymer diaphragm used in lithium ion battery is not high, the electrical conductivity is relatively high, its preparation method is improved, and a kind of preparation method of high strength lithium ion battery diaphragm is proposed

Method used

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  • A kind of preparation method of separator for high-strength lithium-ion battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of high-strength lithium-ion battery diaphragm, the steps are:

[0024] Step 1: Take 60Kg of polypropylene, 4Kg of silicon carbide powder, 3Kg of titanium oxide powder, 8Kg of chlorinated polyethylene, 4Kg of stearic acid, 5Kg of polysulfide rubber, 1Kg of tolyldiureidosilane, and plasticizer phthalic acid Dioctyl 4Kg, mixed evenly, put into the side feed hopper of the twin-screw extruder, melted, kneaded, extruded, cooled, dried, pelletized, and film-made to obtain the base material, the screw of the twin-screw extruder The temperature is controlled between 180°C and the screw speed is controlled at 170 rpm;

[0025] Step 2, zirconia powder 5Kg, pentaerythritol stearate 2Kg, surfactant lecithin 4Kg, antioxidant (antioxidant 1010) 0.5Kg, stabilizer dibutyltin dilaurate 0.5Kg, organic solvent, stir Uniformly, a mixed solution is obtained;

[0026] Step 3: Heat the substrate to 90°C and keep it for 60 minutes, then at this temperature, apply the m...

Embodiment 2

[0028] The preparation method of high-strength lithium-ion battery diaphragm, the steps are:

[0029] Step 1: Take 100Kg of polypropylene, 10Kg of silicon carbide powder, 6Kg of titanium oxide powder, 16Kg of chlorinated polyethylene, 10Kg of stearic acid, 10Kg of polysulfide rubber, 3Kg of tolyldiureidosilane, and plasticizer phthalic acid Dioctyl ester 8Kg, mix evenly, put into the side feeding hopper of twin-screw extruder, melt, knead, extrude, cool, dry, cut into pellets, film-making, obtain base material, the screw of twin-screw extruder The temperature is controlled between 200°C and the screw speed is controlled at 190 rpm;

[0030] Step 2, mix 12Kg of zirconia powder, 5Kg of pentaerythritol stearate, 7Kg of surfactant lecithin, 0.8Kg of antioxidant (antioxidant 1010), 0.8Kg of stabilizer dibutyltin dilaurate, organic solvent, and stir Uniformly, a mixed solution is obtained;

[0031] Step 3. Heat the base material to 110°C and keep it for 90 minutes. Then, at this t...

Embodiment 3

[0033] The preparation method of high-strength lithium-ion battery diaphragm, the steps are:

[0034] Step 1: Take 80Kg of polypropylene, 8Kg of silicon carbide powder, 5Kg of titanium oxide powder, 12Kg of chlorinated polyethylene, 6Kg of stearic acid, 8Kg of polysulfide rubber, 2Kg of tolyldiureidosilane, and plasticizer phthalic acid Dioctyl ester 6Kg, mix uniformly, put into the side feeding hopper of twin-screw extruder, melt, knead, extrude, cool, dry, cut into pellets, film-making, obtain base material, the screw of twin-screw extruder The temperature is controlled between 190°C and the screw speed is controlled at 180 rpm;

[0035] Step 2, zirconia powder 8Kg, pentaerythritol stearate 4Kg, surfactant lecithin 5Kg, antioxidant (antioxidant 1010) 0.7Kg, stabilizer dibutyltin dilaurate 0.7Kg, organic solvent, stir Uniformly, a mixed solution is obtained;

[0036] Step 3: Heat the base material to 100°C and keep it for 80 minutes. Then, at this temperature, apply the mix...

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Abstract

The invention relates to a preparation method of a diaphragm for a high-strength lithium-ion battery, belonging to the technical field of lithium-ion batteries. It includes the following steps: take polypropylene, silicon carbide powder, titanium oxide powder, chlorinated polyethylene, stearic acid, polysulfide rubber, tolylbisureidosilane, and plasticizer, mix them evenly, and put them into a twin-screw extruder The side feeding hopper is used for melting, kneading, extruding, cooling, drying, pelletizing, and film-making to obtain the base material; zirconia powder, pentaerythritol stearate, surfactant, antioxidant, stabilizer, Organic solvent, stir evenly to obtain a mixed solution; heat the substrate, and then apply the mixed solution on the substrate film; heat up, let cool, and that’s it. In the present invention, by doping the silicon carbide powder into the base material, a higher binding force can be formed between the surface coating and the strength of the diaphragm is improved.

Description

technical field [0001] The invention relates to a preparation method of a diaphragm for a high-strength lithium-ion battery, belonging to the technical field of lithium-ion batteries. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on lithium ions to move between positive and negative electrodes to work. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Batteries generally use materials containing lithium elements as electrodes, which are representatives of modern high-performance batteries. [0003] Lithium-ion batteries mainly include: (1) Positive electrode: The active material is generally lithium manganese o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/06C08L23/12C08L23/28C08L81/04C08K13/06C08K9/02C08K3/34C08K9/06C08K3/22C08K5/09C08K5/5455H01M2/14H01M2/16H01M50/403H01M50/417H01M50/431H01M50/446H01M50/489H01M50/497
CPCY02E60/10
Inventor 高保清陈红辉舒均国
Owner 中材锂膜(常德)有限公司
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