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Preparation method of crosslinked polymer electrolyte, semisolid polymer battery and preparation method thereof

A polymer and electrolyte technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, solid electrolytes, etc., can solve the problem of low room temperature conductivity and achieve high dissociation rate, good compatibility, good stability and rate performance Effect

Active Publication Date: 2019-04-05
广东聚圣科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its conductivity at room temperature is low, and it needs to be cycled stably under high temperature conditions.

Method used

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  • Preparation method of crosslinked polymer electrolyte, semisolid polymer battery and preparation method thereof
  • Preparation method of crosslinked polymer electrolyte, semisolid polymer battery and preparation method thereof
  • Preparation method of crosslinked polymer electrolyte, semisolid polymer battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] It is prepared by reacting monoglycerol methacrylate and trimethyl borate according to the stoichiometric ratio of 1:1, then adding polyoxyethylene alcohol with hydroxyl groups at both ends for bridging, stirring and reacting for 18 hours; drying to remove solvent, after Column chromatography, obtains borate cross-linking agent structural formula as

[0025]

[0026] Under the protective atmosphere of argon with the content of water and oxygen less than 1ppm, the borate crosslinking agent of the above structure, the polymer monomer of polyethylene glycol diacrylate, lithium hexafluorophosphate, ethylene carbonate modifier and azo Diisobutyronitrile initiators are mixed to obtain a pre-polymerization solution, in which the mass ratio of the above substances is 20:10:10:59:1, and polymer electrolyte membrane can be obtained by in-situ polymerization on polypropylene diaphragm material at 70°C for 1 hour . After testing, the conductivity of the electrolyte membrane at ...

Embodiment 2

[0029] It is prepared by reacting monoglyceride methacrylate and trimethyl borate according to the stoichiometric ratio of 1:1, then adding polyvinyl alcohol acrylate for reaction, stirring for 18 hours; drying to remove solvent, and column chromatography to obtain The structural formula of borate ester crosslinking agent is

[0030]

[0031] Under the protective atmosphere of argon with water and oxygen content less than 1ppm, the borate crosslinking agent of the above structure, polymer monomer of polyethylene glycol diacrylate, lithium bistrifluoromethanesulfonimide, Propylene carbonate modifier and azobisisoheptanonitrile initiator are mixed to obtain a pre-polymerization solution, wherein the mass ratio of the above-mentioned substances is 20:10:20:49.5:0.5, at 60 ° C, on the cellulose non-woven membrane The polymer electrolyte membrane can be obtained by in-situ polymerization of materials for 10 h. After testing, the conductivity of the electrolyte membrane at room ...

Embodiment 3

[0034] It is prepared by reacting monoglycerol methacrylate and trimethyl borate according to the stoichiometric ratio of 1:1, then adding polyvinyl alcohol acrylate for reaction, stirring for 10 hours; drying to remove acetonitrile, and obtaining boron by column chromatography The structural formula of ester crosslinking agent is

[0035]

[0036]Under the protective atmosphere of argon with water and oxygen content less than 1ppm, the borate crosslinking agent with the above structure, polymer monomer of isooctyl methacrylate, lithium oxalate difluoroborate, tetraethylene glycol dimethyl Ether modifier and cyclohexanone isoperoxide initiator are mixed to obtain a pre-polymerization solution, wherein the mass ratio of the above-mentioned substances is 10:5:5:79.5:0.5, at 50°C, in-situ polymerization on glass fiber for 15h A polymer electrolyte membrane can be obtained. After testing, the conductivity of the electrolyte membrane at room temperature is 2.8×10 -3 S / cm, the ...

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Abstract

The invention provides a preparation method of crosslinked polymer electrolyte, a semisolid polymer battery and a preparation method thereof. A cyclic borate with alkenyl groups at two terminals is used as a crosslinker; a polymer monomer and the like are subjected to in-situ polymerization on a support material to obtain the crosslinked polymer electrolyte. The preparation method of the crosslinked polymer electrolyte is simple; the prepared polymer electrolyte has small resistance and good compatibility with electrodes, and has good mechanical properties and high electrical conductivity andtransport number; a polymer battery electrolyte assembly with the polymer electrolyte has good stability and rate performance.

Description

technical field [0001] The invention relates to a method for preparing an electrolyte for a secondary battery, a secondary battery and the preparation method, in particular to a method for preparing a polymer electrolyte, a polymer battery and the preparation method. Background technique [0002] Compared with traditional electrolytes, polymer electrolytes have the advantages of good mechanical properties, wide electrochemical window, high safety performance, and easy matching with high-voltage electrodes. They are more suitable for the next generation of high-performance secondary batteries, especially large-scale secondary lithium batteries. It has broad application prospects in the fields of electric vehicles, energy storage power stations and other fields. The polymer matrices studied can be divided into linear polymers, cross-linked polymers, comb polymers and other categories. Cross-linked polymer electrolytes usually have an interpenetrating network or semi-interpene...

Claims

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Application Information

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IPC IPC(8): C08F230/06C08F222/20C08F220/18C08F220/20H01M10/052H01M10/0565
CPCH01M10/052H01M10/0565C08F230/06C08F220/1808C08F220/20C08F222/102C08F220/1802Y02E60/10H01M2300/0082H01M10/058
Inventor 韦伟峰戴宽冯昊宇
Owner 广东聚圣科技有限公司
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