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A kind of preparation method of lithium ion battery electrolyte membrane

A lithium-ion battery and electrolyte membrane technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of low temperature resistance, low electrical performance, insufficient mechanical strength, etc., and achieve good mechanical properties and good electrolyte wettability and the effect on electrical properties

Active Publication Date: 2018-05-11
JIANGSU SHENSU ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used lithium-ion battery electrolyte membrane has problems of insufficient mechanical strength, low temperature resistance and low electrical performance, so there are great limitations in the use process.

Method used

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  • A kind of preparation method of lithium ion battery electrolyte membrane

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Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method for lithium ion battery electrolyte membrane, comprising the following steps:

[0021] Step 1, 5 parts by weight of phenolic resin, 3 parts of PET, 2 parts of maleic anhydride resin, 3 parts of modified graphite, 2 parts of polyester fiber, and 2 parts of polyvinyl alcohol are stirred and mixed in a mixing mixer Uniformly, the stirring speed is 120 rev / min, and the stirring time is 20 minutes, and the material 1 is obtained;

[0022] Step 2, transfer material 1 into the reaction kettle, raise the temperature to 70°C at a heating rate of 5°C / min, keep it for 60 minutes, then add 1 part of polyvinyl butyral, and raise the temperature to 90°C under nitrogen protection. ℃, kept for 5 minutes to obtain material 2;

[0023] Step 3, after drying the material 2, add 1 part by weight of titanium dioxide and 2 parts of carboxymethyl cellulose, and mix evenly to obtain the material 3, wherein the drying temperature is 110° C., and the drying time is 2 hours; ...

Embodiment 2

[0027] A preparation method for lithium ion battery electrolyte membrane, comprising the following steps:

[0028] Step 1, 6 parts by weight of phenolic resin, 4 parts of PET, 3 parts of maleic anhydride resin, 5 parts of modified graphite, 3 parts of polyester fiber, and 4 parts of polyvinyl alcohol are stirred and mixed in a mixing mixer Uniformly, the stirring speed is 130 rpm, and the stirring time is 25 minutes, and the material 1 is obtained;

[0029] Step 2, transfer material 1 into the reaction kettle, raise the temperature to 75°C at a heating rate of 5°C / min, keep it for 68 minutes, then add 2 parts of polyvinyl butyral, and raise the temperature to Keep at 95°C for 6 minutes to obtain material 2;

[0030] Step 3, after drying the material 2, add 2 parts by weight of titanium dioxide and 3 parts of carboxymethyl cellulose, and mix evenly to obtain the material 3, wherein the drying temperature is 114 ° C, and the drying time is 3 hours;

[0031] Step 4: Extrude the...

Embodiment 3

[0034] A preparation method for lithium ion battery electrolyte membrane, comprising the following steps:

[0035] Step 1, 8 parts by weight of phenolic resin, 7 parts of PET, 4 parts of maleic anhydride resin, 6 parts of modified graphite, 4 parts of polyester fiber, and 3 parts of polyvinyl alcohol are stirred and mixed in a mixing mixer Evenly, the stirring speed is 140 rpm, and the stirring time is 28 minutes to obtain material 1;

[0036] Step 2, transfer material 1 into the reaction kettle, raise the temperature to 80°C at a heating rate of 5°C / min, keep it for 90 minutes, then add 3 parts of polyvinyl butyral, and raise the temperature to 96°C under nitrogen protection. ℃, kept for 8 minutes to obtain material 2;

[0037] Step 3, after drying the material 2, add 2 parts by weight of titanium dioxide and 4 parts of carboxymethyl cellulose, and mix evenly to obtain the material 3, wherein the drying temperature is 117° C., and the drying time is 3 hours;

[0038] Step 4...

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Abstract

The invention discloses a preparation method for a lithium ion battery electrolyte membrane. The method comprises the steps that firstly, phenolic resin, PET, maleic anhydride resin, modified graphite, polyester fibers and polyvinyl alcohol are stirred and mixed to be uniform, and a first material is obtained; secondly, the mixed material is transferred into a reaction kettle, the temperature is raised and kept for a certain period of time, then polyvinyl butyral is added, the temperature is raised again under protection of inert gas and kept for a period of time, and a second material is obtained; thirdly, titanium dioxide and carboxymethylcellulose are added after the second material is dried, the materials are mixed to be uniform, and a third material is obtained; lastly, the third material is extruded through a twin-screw extruder to form a membrane, and the lithium ion battery electrolyte membrane is obtained. The lithium ion battery electrolyte membrane obtained through the preparation method has good mechanical properties, electrolyte wetting properties and electrical properties.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a preparation method of an electrolyte membrane of a lithium ion battery. Background technique [0002] Lithium-ion batteries have become the most popular source of power due to their advantages such as high-density energy, long cycle life, no memory effect, strong safety and reliability, and fast charging and discharging. Lithium-ion batteries using polymer electrolyte membranes have the characteristics of small size and changeable shape, so they are widely used in portable electronic products, such as laptop computers, cameras, mobile communication equipment, etc. Large-capacity polymer lithium-ion batteries are also used in electric vehicles and are expected to become one of the main sources of power for electric vehicles in the 21st century, and will be used in satellites, aerospace and energy storage. [0003] The working principle of lithium-ion b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/06C08L67/02C08L67/00C08K9/04C08K3/04C08K3/22H01M10/0565
CPCC08J5/18C08J2361/06C08J2467/02C08L61/06C08L2201/08C08L2203/16C08L2203/20C08L2205/02C08L2205/035C08L2205/16H01M10/0565C08L67/02C08L67/00C08K9/04C08K3/04C08K2003/2241Y02E60/10
Inventor 周江王正飞杨同兴马骁
Owner JIANGSU SHENSU ELECTRONICS TECH CO LTD