Boron-containing gel polymer electrolyte and preparation method and application thereof

A technology of gel polymers and electrolytes, applied in the direction of electrolyte immobilization/gelation, circuits, electrical components, etc., can solve the problems of easy leakage, high temperature, flammability and explosion, etc., and achieve good low temperature performance and high mechanical properties , high dissociation effect

Active Publication Date: 2017-02-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional electrolytes are mainly organic electrolyte systems. Under liquid conditions, the conductivity of ions is particularly high. However, organic systems have the defects of high temperature, flammability, explosion, and liquid leakage.

Method used

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  • Boron-containing gel polymer electrolyte and preparation method and application thereof
  • Boron-containing gel polymer electrolyte and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 50 mmol phenylboronic acid (PBA), 50 mmol 2,3-dihydroxypropyl methacrylate (GMMA), 50 g 4Å molecular sieves and 300 ml anhydrous dichloromethane into a 500 ml three-necked beaker, and pass inert gas for Protection, and the solution was stirred continuously for more than 24h. The mixture was suction-filtered more than 3 times, and then washed with a neutral alumina column to obtain a pure dichloromethane solution of olefinic boron-containing heterocyclic monomer (GMMA-PBA). After rotary evaporation, the pure light yellow monomer (GMMA-PBA) was obtained, and the yield was about 1.

[0034] Take 2ml of the above-mentioned monomer GMMA-PBA, the content of photoinitiator (benzoin dimethyl ether) is 1%-5%, glycidyl methacrylate (GMA, the content is 10% of GMMA-PBA) and 1ml of 2M DMF LiClO 4 Add it into a 5 ml beaker and stir evenly, then cast it in a 0.5mm thick PTFE mold; under the protection of an inert gas, the LED lamp irradiates the mold for about 6 minutes to obta...

Embodiment 2

[0036] Add 50 mmol of phenylboronic acid (PBA), 50 mmol of 2,3-dihydroxypropyl methacrylate (GMMA), and 100 ml of anhydrous toluene into a 200 ml three-neck beaker equipped with a condenser tube and an azeotropic device. Azeotropic water removal at 130-145°C for 6-8 hours. The mixture was suction-filtered more than 3 times, and then washed with a neutral alumina column to obtain a pure toluene solution of olefinic boron-containing heterocyclic monomer (GMMA-PBA). After rotary evaporation, the pure light yellow monomer (GMMA-PBA) was obtained, and the yield was about 1.

[0037]Take 2ml of the above-mentioned monomer GMMA-PBA, the content of photoinitiator (benzoin dimethyl ether) is 1%-5%, glycidyl methacrylate (GMA, the content is 10% of GMMA-PBA) and 1ml of 2M DMF LiClO 4 Add it into a 5 ml beaker and stir evenly, then cast it in a 0.5mm thick PTFE mold; under the protection of an inert gas, the LED lamp irradiates the mold for about 6 minutes to obtain the copolymer P((GM...

Embodiment 3

[0039] Accurately weigh 2ml of GMMA-PBA, a boron-containing heterocycloalkene monomer, the content of photoinitiator (benzoin dimethyl ether) is 1%-5%, the content of glycidyl methacrylate (GMA, 20% of GMMA-PBA ) and 1ml of 2M DMF·LiClO 4 Add it into a 5 ml beaker and stir evenly, then cast it in a 0.5mm thick PTFE mold; under the protection of an inert gas, the LED lamp irradiates the mold for about 6 minutes to obtain the copolymer P((GMMA-PBA)-GMA). The thickness of the film is 150-200 μm. The conductivity of the polymer electrolyte was measured using a sandwich structure that was assembled in a 2016 button cell in the order of stainless steel / polymer electrolyte membrane / stainless steel. The AC impedance spectrum of the polymer electrolyte membrane was tested, and the room temperature conductivity was calculated to be 1.5×10 -3 S cm -1 .

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Abstract

The invention belongs to the technical field of polymer electrolytes, and particularly relates to a boron-containing gel polymer electrolyte and a preparation method and application thereof. The gel polymer electrolyte is prepared from lithium salt, an organic solvent, a photoinitiator, boron-containing heterocyclic photosensitive monomers and acrylate monomers in a copolymerization mode. The preparation method of the gel polymer electrolyte includes the steps that a compound containing boric acid groups and an alkene compound with a diol structure are esterified to obtain boron-containing heterocyclic alkene monomers, and the boron-containing heterocyclic alkene monomers, the acrylate monomers, the photoinitiator, the lithium salt and the organic solvent are uniformly dispersed; a mould containing the mixed solution is irradiated by an LED lamp for surface photo-initiated polymerization, and the boron-containing gel polymer electrolyte is obtained. The boron-containing gel polymer electrolyte has high ionic conductivity and a high cationic transference number, effectively solves the problems of liquid leakage, corrosion, poor mechanical performance and the like of a liquid electrolyte in traditional lithium-ion batteries and can be applied to preparation of supercapacitors, lithium-ion batteries, hybrid supercapacitors and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer electrolytes, and in particular relates to a boron-containing gel polymer electrolyte and its preparation method and application. Background technique [0002] The liquid electrolyte in traditional energy storage devices such as lithium-ion batteries is difficult to meet people's daily use due to the shortcomings of leakage, flammability and explosion. With the continuous advancement of science and technology, more and more lightweight and miniaturized new energy devices have entered the public eye. Polymer batteries are increasingly used in laptops, mobile phones, charging treasures, electric vehicles, and drones. universal. Electrolyte is one of the important components of energy storage devices such as supercapacitors and lithium-ion batteries. Its main function is to provide ions that can be transported or as a channel for ion transport. Traditional electrolytes are mainly organic electrolyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F230/06C08F220/32C08F2/48C08F2/44C08K3/24H01M10/0565
CPCC08F2/44C08F2/48C08F230/06C08K3/16H01M10/0565H01M2300/0085C08F220/325Y02E60/10
Inventor 马晓华袁平彭夏雨郭艳辉田文生
Owner FUDAN UNIV
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