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A kind of preparation method of healable ion gel polymer electrolyte

An ion gel, polymer technology, used in non-aqueous electrolyte batteries, sustainable manufacturing/processing, circuits, etc., can solve problems such as long healing time, achieve broad application prospects, large electrochemical window, and excellent autonomous self-healing effect of ability

Active Publication Date: 2022-08-09
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although recent advances have successfully fabricated self-healing ionogels requiring long healing times and specific external stimuli, challenges remain to prepare self-supporting ionogels with high repair efficiency under various harsh conditions

Method used

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  • A kind of preparation method of healable ion gel polymer electrolyte
  • A kind of preparation method of healable ion gel polymer electrolyte
  • A kind of preparation method of healable ion gel polymer electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Accurately weigh 0.0718 g lithium bistrifluoromethanesulfonimide (LiTFSI) (0.25 mmol) and 2.5 g 1-ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt (BMImTFSI) (6.4 mmol) Add to the beaker, and add small magnetic particles to the beaker and stir to dissolve at room temperature to obtain ionic liquid solution B doped with 0.1mol / kg LiTFSI

Embodiment 2

[0030] Weigh 0.0067g of 1,3,5-triformylbenzene (TPB), 0.125g of diaminopolyethylene glycol (PEG-diamine), 0.0328g of doped 0.1mol / kg LiTFSI of ionic liquid solution B, and simultaneously pipette 500 μl of anhydrous acetonitrile solvent to make [amine] 0 = [aldehyde] 0 = 0.25M. Then the mixture was stirred on an intelligent constant temperature timed magnetic stirrer for 1 h to dissolve completely. Once the solution has become homogeneous, use a pipette to slowly transfer it to a Teflon mold to minimize the formation of air bubbles, the top and bottom of the mold are covered with two microscope slides, allowing the mixture to cool at room temperature. Let stand in the mold for 1 hour. The ion gel polymer electrolyte membrane (IGPE-20) was obtained, which was finally put into a vacuum drying oven and dried at 80°C.

Embodiment 3

[0032] Weigh 0.0067g of 1,3,5-triformylbenzene (TPB), 0.125g of diaminopolyethylene glycol (PEG-diamine), 0.0709g of doped 0.1mol / kg LiTFSI of ionic liquid solution B, and simultaneously pipette 500 μl of anhydrous acetonitrile solvent to make [amine] 0 = [aldehyde] 0 = 0.25M. Then the mixture was stirred on an intelligent constant temperature timed magnetic stirrer for 1 h to dissolve completely. Once the solution has become homogeneous, use a pipette to slowly transfer it to a Teflon mold to minimize the formation of air bubbles, the top and bottom of the mold are covered with two microscope slides, allowing the mixture to cool at room temperature. Let stand in the mold for 1.5 hours. The ion gel polymer electrolyte membrane (IGPE-35) was obtained, and finally it was put into a vacuum drying oven and dried at 80°C.

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Abstract

The invention provides a preparation method of a healable ion gel polymer electrolyte. The polycondensation of diamino polyethylene glycol with a molecular weight of 2000 and 1,3,5-triformyl benzene in a polar solvent acetonitrile forms a dynamic Imine-crosslinked polymer backbone. Then 0.1 mol / kg of 1-ethyl-3-methylimidazole bis(trifluoromethylsulfonyl)imide of lithium bistrifluoromethanesulfonimide is doped into the above-mentioned polymer backbone to obtain Self-healing under harsh conditions, high ionic conductivity at room temperature, and good mechanical flexibility ion gel polymer electrolyte realizes the self-healing ability and conductivity of electrolyte under harsh conditions, and improves the safety, cycle life and Scope of application.

Description

technical field [0001] The invention relates to a preparation method of a healable ion gel polymer electrolyte, and specifically belongs to the technical field of lithium metal battery materials. Background technique [0002] Lithium metal batteries are considered to be the most promising energy storage technology, and lithium metal batteries with typical coin cells or flexible packaging have received extensive attention due to their multiple advantages such as high energy density, light weight, high operating voltage, and small memory effect, and Essential for enabling portable and wearable electronics. However, in order to meet more social needs, in addition to improving the energy density and power density of batteries, the further improvement of battery safety and stability is still a key challenge, especially in large-scale applications. [0003] In recent years, gel electrolytes have been extensively investigated as a safe and promising alternative to address challeng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/06C08J5/18H01M10/052H01M10/0565C08L61/22
CPCC08G12/06C08J5/18H01M10/052H01M10/0565C08J2361/22Y02P70/50
Inventor 童永芬曹晓燕万龙薛小媛
Owner NANCHANG HANGKONG UNIVERSITY
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