Polyimide single-ion polymer, preparation method thereof and solid polymer electrolyte membrane

A technology based on ionic polymers and polyimides, applied in the field of polymers and lithium-ion batteries, can solve the problem of difficult balance between thermal stability and electrochemical stability of polymer electrolyte membranes

Active Publication Date: 2020-08-18
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to solve the defect that the thermal stability and electrochemical stability of the polymer electrolyte membrane are difficult to be taken into account at the same time. The present invention provides a polyimide single ion polymer and its preparation method, and the single ion Polymer as Solid Polymer Electrolyte Membrane

Method used

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  • Polyimide single-ion polymer, preparation method thereof and solid polymer electrolyte membrane
  • Polyimide single-ion polymer, preparation method thereof and solid polymer electrolyte membrane
  • Polyimide single-ion polymer, preparation method thereof and solid polymer electrolyte membrane

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Embodiment 1

[0048] a. 3-Chloropropanesulfonyl lithium (trifluoromethanesulfonyl)imide Preparation of:

[0049] Add 10mmol (1.4909g) of trifluoromethanesulfonamide and 20mmol (0.4786g) of LiOH to 10ml of anhydrous acetonitrile, fill with nitrogen to maintain an inert atmosphere, and add 10mmol (1.7705g) of 3- Chloropropanesulfonyl chloride was reacted at room temperature for 20 hours, acetonitrile was removed by rotary evaporation, and the obtained 3-chloropropanesulfonyl lithium (trifluoromethanesulfonyl)imide solid was recrystallized in dichloromethane, and 1.8125 g of white solid was obtained by filtration. That 1 HMR spectrum such as figure 1 shown.

[0050] b. Synthesis of Polyimides Containing Hydroxyl :

[0051] 2,2'-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (AHHFP), 4,4'-oxydiphthalic anhydride (ODPA), and 4,4'-diaminobis Add 1.83g, 3.10g, and 1.00g of phenyl ether (ODA) respectively (molar ratio is 1:2:1), add 35mL of m-cresol, pass nitrogen, add a drying tube, stir ev...

Embodiment 2

[0060] (1) Add 20mmol (2.9818g) of trifluoromethanesulfonamide and 40mmol (0.9572g) of LiOH to 20ml of anhydrous acetonitrile, fill with nitrogen to maintain an inert atmosphere, and add 20mmol (3.541g) in an ice-water bath 3-chloropropanesulfonyl chloride, react at room temperature for 20h, remove acetonitrile by rotary evaporation, recrystallize the solid 3-chloropropanesulfonyl lithium (trifluoromethanesulfonyl)imide in dichloromethane, and filter to obtain 3.628g white solid.

[0061] (2) 2,2'-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (AHHFP), 4,4'-oxydiphthalic anhydride (ODPA), and 4,4'- Add 2.56g, 3.10g, and 0.60g of diaminodiphenyl ether (ODA) respectively (the molar ratio is 7:10:3), add 25mL of m-cresol, pass nitrogen, add a drying tube, stir evenly, and heat up to 80 Heat and stir at ℃ for 4 hours, then add 2.5 mL of isoquinoline, stir evenly, heat to 180 ℃, react for 18 hours, pour the reaction liquid into ethanol, form fibers, wash with water and ethanol alte...

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Abstract

The invention provides a polyimide single-ion polymer, a preparation method thereof and a solid polymer electrolyte membrane. The chemical structure of the polyimide single-ion polymer is shown as a formula (I). The good thermal stability of polyimide is utilized; in addition, each repeating unit of the obtained polyimide skeleton contains two trifluoromethyl groups (-CF3), so that the polymer hasgood solubility; 3-chloropropane sulfonyl lithium (trifluoromethanesulfonyl) imide lithium salt is fixed on the polymer through a grafting reaction; low lithium ion dissociation domain energy existing in a lithium bis(sulfonyl) imide part can promote dissociation and transmission of lithium ions in grafted 3-chloropropanesulfonyl lithium (trifluoromethanesulfonyl) imide lithium salt, high lithiumion conductivity of the polymer electrolyte is ensured, more lithium sources are provided, the migration number of Li<+> of the electrolyte membrane is increased; therefore, the thermal stability andelectrochemical stability of the polymer electrolyte membrane and the cycling stability of a battery are ensured, and the use safety of a lithium ion battery is ensured.

Description

technical field [0001] The invention belongs to the field of polymers and lithium-ion batteries, in particular to a polyimide single-ion polymer and a preparation method thereof, as well as a solid polymer electrolyte membrane comprising the polyimide single-ion polymer and a lithium-ion battery . [0002] technical background [0003] Lithium-ion batteries have the advantages of high energy density, large output power, high voltage, small self-discharge, wide operating temperature range, no memory effect, and environmental friendliness. They have been used in electric vehicles, rail transit, large-scale energy storage, and aerospace. field. A traditional lithium-ion battery is composed of a liquid organic electrolyte, a separator, a positive electrode, and a negative electrode. Electrolyte is an important part of lithium-ion batteries. The material itself and its preparation process will affect the generation of lithium dendrites during the operation of the battery, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10H01M10/0525H01M10/0565
CPCC08G73/1071C08G73/1039C08G73/1042C08G73/1046H01M10/0565H01M10/0525Y02E60/10
Inventor 呼微梁笑笑朱广山刘佰军谢海明
Owner NORTHEAST NORMAL UNIVERSITY
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