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Sulfonated polyaryletherketone and preparation method and application thereof

A sulfonated polyaryletherketone, lithium battery separator technology, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, structural parts, etc., can solve the problems of poor solubility of PEEK, unsuitable for industrial production, harsh operating conditions, etc. , to achieve the effects of good electrolyte wettability, high loading rate and good mechanical properties

Active Publication Date: 2020-09-29
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PEEK has poor solubility and high chemical stability, and is insoluble in general strong acids or strong alkalis except concentrated sulfuric acid; therefore, high-temperature melt-blown methods are generally used to form films, but this method consumes a lot of energy. Harsh operating conditions, not suitable for large-scale industrial production

Method used

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  • Sulfonated polyaryletherketone and preparation method and application thereof
  • Sulfonated polyaryletherketone and preparation method and application thereof
  • Sulfonated polyaryletherketone and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: the preparation of polyaryletherketone

[0031] Under continuous and stable nitrogen conditions, hexafluorobisphenol A (0.32 mol), 4,4-bis(4-hydroxyphenyl)pentanoic acid (0.08 mol), 2,2'-bisphenol Allyl bisphenol A (0.4 mol), 1,4 bis(4-fluorobenzoyl)benzene (0.88 mol), anhydrous potassium carbonate (0.84 mol), 750 ml sulfolane (TMS) and 350 ml toluene, reflux 3 h, try to remove the water in the reaction; heat the reaction system to 180 °C under mechanical stirring, release toluene during the reaction; after 6 h, the solution becomes viscous, add a small amount of sulfolane to it, and polymerize after 1 h Completely, the viscous solution was quickly poured into 800 ml deionized water under stirring to obtain a white filamentous solid. Grind the solid polymer, reflux in deionized water and ethanol solution for 4-5 times to wash away the salts and solvents in the polymer, and vacuum-dry at 120 °C for 24 h after suction filtration to obtain polyaryletherketon...

Embodiment 2

[0033] Embodiment 2: Preparation of sulfonated polyaryletherketone

[0034] Take 10 g of the polyaryletherketone product obtained in Example 1, mix it with 200 ml of 98% concentrated sulfuric acid, mechanically stir for 12 h, settle with distilled water, pulverize the obtained polymer product, wash the material with distilled water until it is neutral, and then wash it at 80 After vacuum drying at ℃ for 24 h, the sulfonated polyaryletherketone was obtained.

Embodiment 3

[0035] Embodiment 3: the preparation of lithium salt solution

[0036] Take 100 mL of ethanol solution, add a certain amount of lithium bistrifluoromethanesulfonimide (LiTFSI) into it, stir and mix evenly, and prepare a lithium salt solution with a mass fraction of 10%-20%.

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Abstract

The invention provides sulfonated polyaryletherketone and a preparation method and application thereof. According to the invention, hexafluorobisphenol A, 4, 4-bis (4-hydroxyphenyl) valeric acid, 2, 2'-diallyl bisphenol A, 1, 4-bis (4-fluorobenzoyl) benzene and concentrated sulfuric acid are used as raw materials to prepare sulfonated polyaryletherketone with excellent performance, then sulfonated polyaryletherketone is processed through an electrostatic spinning technology to obtain a porous sulfonated polyaryletherketone electrostatic spinning membrane, and then the porous sulfonated polyaryletherketone electrostatic spinning membrane is infiltrated into a lithium salt solution to be modified to finally obtain the sulfonated polyaryletherketone lithium battery diaphragm. The sulfonatedpolyaryletherketone lithium battery diaphragm prepared by the invention has excellent mechanical properties, thermal stability and electrochemical properties, after 200 cycles at 0.2 C multiplying power, the sulfonated polyaryletherketone lithium battery diaphragm still has good coulombic efficiency, and the specific discharge capacity still can reach 150 mAh g <-1 > or above.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to sulfonated polyarylether ketone, a preparation method and its application in porous lithium battery separators through electrostatic spinning technology and lithium salt infiltration method. Background technique [0002] With the increasing requirements for sustainable development in today's world, lithium batteries have been widely used in mobile phones, computers and electric vehicles due to their advantages such as high energy density, high cycle stability and environmental protection. The development of the industry has put forward higher requirements for electrical performance, and lithium batteries are expected to become one of the main forms of energy in the future society. The working principle of a lithium battery is that lithium ions move freely between the positive electrode and the negative electrode, and are repeatedly intercalated and deinterca...

Claims

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Application Information

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IPC IPC(8): C08G65/48C08G65/40D01F6/78D04H1/728D01D5/00D06M13/503H01M2/16H01M10/052D06M101/30
CPCC08G65/48C08G65/4025C08G65/4043D01F6/78D04H1/728D01D5/0015D06M13/503H01M10/052D06M2101/30Y02E60/10
Inventor 呼微梁笑笑杨雪杜新伟赵麒刘佰军王艳淼徐义全王寒冰张亮
Owner CHANGCHUN UNIV OF TECH
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