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Three-arm branched polymerized ionic liquid gel electrolyte and preparation method thereof

A technology for polymerizing ionic liquids and gel electrolytes, applied in circuits, fuel cells, electrical components, etc., can solve the problems of poor stability, low electrical conductivity, insufficient mechanical strength, etc., and achieve the effects of easy processing and size control.

Active Publication Date: 2018-01-12
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low conductivity, poor stability, and insufficient mechanical strength in current solid-state electrolytes, the present invention provides a three-arm branched polymeric ionic liquid, and uses this as a matrix to prepare a polymeric ionic liquid gel electrolyte, which can be used for lithium Ion batteries, lithium-sulfur batteries, lithium-air batteries and other fields

Method used

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  • Three-arm branched polymerized ionic liquid gel electrolyte and preparation method thereof
  • Three-arm branched polymerized ionic liquid gel electrolyte and preparation method thereof
  • Three-arm branched polymerized ionic liquid gel electrolyte and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1: (R 1 for R 2 for )

[0045] Under nitrogen, 2.68g of trimethylolpropane was dissolved in tetrahydrofuran, cooled in an ice bath, 27.6g of 2-bromoisobutyryl bromide and 12g of triethylamine were successively added dropwise, stirred for 24h and raised to room temperature. The product was transferred to a separatory funnel and extracted with dichloromethane using 10% hydrochloric acid, 5% NaHCO 3 Wash with aqueous solution and deionized water repeatedly. The organic phase was dried over anhydrous magnesium sulfate, and spin-dried under reduced pressure. A mixed solvent of dichloromethane and methanol is used for recrystallization to obtain a three-arm macromolecular initiator.

[0046] Under nitrogen, dissolve 0.037g of cuprous bromide, 4g of dimethylaminoethyl methacrylate and 0.044g of N,N,N',N",N"-pentamethyldiethylenetriamine in 6g of ionized water. Dissolve 0.025 g of the three-arm macromolecular initiator obtained in step 1 in 1 mL of DMSO, and ...

Embodiment 2

[0053] Embodiment 2: (R 1 for R 3 for )

[0054] Under the protection of nitrogen, 2.68g of trimethylolpropane was dissolved in tetrahydrofuran, cooled in an ice bath, 27.6g of 2-bromoisobutyryl bromide and 12g of anhydrous triethylamine were added dropwise, stirred for 24h and raised to room temperature. The product was transferred to a separatory funnel and extracted with dichloromethane using 10% hydrochloric acid, 5% NaHCO 3 Wash with aqueous solution and deionized water repeatedly. The organic phase was dried over anhydrous magnesium sulfate, and spin-dried under reduced pressure. A mixed solvent of dichloromethane and methanol is used for recrystallization to obtain a three-arm macromolecular initiator.

[0055] Under nitrogen, 0.037g of cuprous bromide, 4g of dimethylaminoethyl methacrylate and 0.058g of 1,1,4,7,10,10-hexamethyltriethylenetetramine were dissolved in 6g of deionized water. Dissolve 0.025 g of the three-arm macroinitiator obtained in step 1 in 1 ...

Embodiment 3

[0062] Embodiment 3: (R 1 for R 2 for )

[0063] Under the protection of nitrogen, 2.68g of trimethylolpropane was dissolved in tetrahydrofuran, cooled in an ice bath, 27.6g of 2-bromoisobutyryl bromide and 12g of anhydrous triethylamine were added dropwise, stirred for 24h and raised to room temperature. The product was transferred to a separatory funnel and extracted with dichloromethane using 10% hydrochloric acid, 5% NaHCO 3 Wash with aqueous solution and deionized water repeatedly. The organic phase was dried over anhydrous magnesium sulfate, and spin-dried under reduced pressure. A mixed solvent of dichloromethane and methanol is used for recrystallization to obtain a three-arm macromolecular initiator.

[0064] Under nitrogen, 0.037g of cuprous bromide, 4g of dimethylaminoethyl methacrylate and 0.04g of 2,2-bipyridyl were dissolved in 6g of toluene. Dissolve 0.025 g of the three-arm macroinitiator obtained in step 1 in 1 mL of DMSO, and add the solution contain...

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Abstract

The invention discloses three-arm branched polymerized ionic liquid gel electrolyte and a preparation method thereof. The preparation method comprises the following steps: enabling trimethylolpropaneto react with 2-bromine isobutyryl so as to prepare a three-arm macroinitiator; performing atom transfer free radical polymerization on methacrylic acid dimethylamino ethyl ester with the three-arm macroinitiator so as to prepare a three-arm branched polymer; performing an N-alkylation reaction and ion exchange on the three-arm branched polymer with halogenated hydrocarbon or halogenated quaternary ammonium salt so as to obtain a three-arm branched polymerized ionic liquid; compounding the three-arm branched polymerized ionic liquid with different lithium salts and ionic liquids, and performing a solution casting method, so as to obtain the polymerized ionic liquid gel electrolyte. The polymerized ionic liquid gel electrolyte is relatively high in ionic conductivity and ion transference number and relatively wide in electrochemical window and can be applied to fields such as lithium batteries, lithium sulfur batteries and lithium air batteries.

Description

technical field [0001] The invention belongs to the preparation technology of an electrolyte diaphragm material for an energy storage device, and in particular relates to a three-arm branched polymeric ionic liquid gel electrolyte and a preparation method thereof. Background technique [0002] With the development of science and technology and the continuous improvement of people's living standards, various portable mobile electronic devices such as laptops and mobile phones have become necessities in daily life. The use of these mobile terminals is inseparable from the development of energy storage devices. On the other hand, the large-scale use of fossil fuels has brought serious environmental pollution problems such as acid rain and the greenhouse effect. It is imminent to improve energy utilization and conversion efficiency and fully develop green energy technologies. Lithium ion battery is an ideal chemical energy storage device recognized by the international community...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M8/1048H01M8/1072C08F293/00C08F220/34
CPCY02E60/10Y02E60/50
Inventor 杨勇王煜峰周宁
Owner NANJING UNIV OF SCI & TECH
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