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Polyarylether-based polymer with polyethylene glycol structure as side chain, solid polymer electrolyte and preparation method thereof

A solid polymer, polyethylene glycol technology, applied in the direction of solid electrolyte, non-aqueous electrolyte, electrolyte immobilization/gelation, etc., can solve the problem of not being able to meet the conditions of use at the same time, achieve good ionic conductivity, improve electrical conductivity The effect of lower rate, guaranteeing mechanical properties and thermal stability

Active Publication Date: 2021-07-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently reported polymer electrolytes cannot meet the conditions of use in terms of mechanical strength and temperature range. Therefore, the development of new polyarylether-based solid polymer electrolytes with high mechanical strength and heat resistance has attracted more and more attention. people's attention

Method used

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  • Polyarylether-based polymer with polyethylene glycol structure as side chain, solid polymer electrolyte and preparation method thereof
  • Polyarylether-based polymer with polyethylene glycol structure as side chain, solid polymer electrolyte and preparation method thereof
  • Polyarylether-based polymer with polyethylene glycol structure as side chain, solid polymer electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation of Example 1 Polyethylene Glycol 1000 Grafted Polyarylene Ether-Based Polymer PAES7030-g-PEG

[0051] 1) In 100 mL of sulfolane solvent with a concentration of 98%, add 0.07 mol, 0.1 mol and 0.03 mol of phenol monomers with phthalazinone structure, 4,4'-difluorodiphenyl sulfone, bisphenolic acid and 4g potassium carbonate. Then add 50mL of water-carrying agent toluene, the reactant is fully stirred and dissolved, and then heated to 130°C and refluxed for 4 hours to ensure that the water generated by the salt-forming reaction is completely removed, and then the toluene is removed, and finally the system is heated to 180°C for 6 hours. , to obtain a polymer solution.

[0052] 2) Pour the polymer solution prepared above into deionized water to precipitate, and obtain flexible polymer thin strips, which are washed 3 times with deionized water to remove residual reaction solvents and small molecular substances that do not participate in the reaction; the product...

Embodiment 2

[0058] Example 2 Preparation of polyethylene glycol 1000 grafted polyarylether-based polymer PAES9010-g-PEG

[0059] 1) In 100 mL of sulfolane solvent with a concentration of 98%, add 0.09 mol, 0.1 mol and 0.01 mol of phenol monomers with phthalazinone structure, 4,4'-difluorodiphenyl sulfone, bisphenolic acid and 4g potassium carbonate. Then add 50mL of water-carrying agent toluene, the reactant is fully stirred and dissolved, and then heated to 130°C and refluxed for 4 hours to ensure that the water generated by the salt-forming reaction is completely removed, and then the toluene is removed, and finally the system is heated to 180°C for 6 hours. , to obtain a polymer solution.

[0060] 2) Pour the polymer solution prepared above into deionized water to precipitate, and obtain flexible polymer thin strips, which are washed 3 times with deionized water to remove residual reaction solvents and small molecular substances that do not participate in the reaction; the product is ...

Embodiment 3

[0071] Example 3: Preparation of solid polymer electrolytes 1 and 2 by solvent evaporation

[0072] 1) 0.8 g of the dry polyarylether-based polymers containing polyethylene glycol structure in the side chain prepared in Example 1 and Example 2 were respectively dissolved in 8 mL of solvent sulfolane, and stirred at room temperature for 7 h to obtain a uniform, Transparent mixed solution.

[0073] 2) Pour the solution prepared in step 1) onto a horizontal glass plate of 8×8cm to form a film, and dry it in vacuum at 30-60°C for 72 hours to remove the solvent to obtain a polymer solid electrolyte membrane, and then immerse the polymer solid electrolyte membrane in In a lithium salt solution with a concentration of 10 wt%, the membranes were taken out to obtain all-solid polymer electrolytes 1 and 2, respectively. Wherein, the tensile strength of the obtained polymer solid electrolyte membrane is 40MPa and 35MPa.

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Abstract

The invention discloses a polyarylether-based polymer whose side chain is a polyethylene glycol structure and a preparation method thereof, a solid polymer electrolyte and a preparation method thereof. The main chain of the polymer is a polymer structure containing a polyarylether group, and the side chain is a polyethylene glycol structure. The structural formula of the polyarylether-based polymer is as follows: the side chain is a polyethylene glycol structure. The preparation of the polyarylether-based polymer comprises: step (1): preparing a polyarylether-containing polymer; step (2): dissolving the polyarylether-containing polymer and polyethylene glycol in a solvent , then add the catalyst, after the catalyst dissolves, add the coupling agent dropwise, and then carry out the reaction under stirring to obtain the final product. The all-solid polymer electrolyte prepared by the invention has good ion conductivity, and also has excellent heat and high temperature resistance and mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of polymer electrolyte preparation, and in particular relates to a polyarylether-based solid polymer electrolyte with high mechanical strength and heat resistance and a preparation method thereof. Background technique [0002] With the continuous aggravation of global environmental pollution and energy crisis, the development of clean energy technology has received extensive attention, and at the same time promoted the development of electrochemical energy storage devices. As an important part of electrochemical energy storage devices, electrolyte plays an important role in the safety of energy storage devices. [0003] At present, the electrolytes of energy storage devices are mainly liquid electrolytes, but there are many problems in liquid electrolytes. For example, leakage problems during assembly and use, and because the liquid electrolyte is mainly organic electrolyte, it may cause the electrolyte to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/40C08G65/48C08G81/00H01M10/0565
CPCC08G65/4037C08G65/48C08G81/00H01M10/0565C08G65/4006H01M10/0525H01M2300/0082C08G65/485C08G2650/38H01M2300/0085
Inventor 蹇锡高胡方圆刘程张守海王锦艳宗立率
Owner DALIAN UNIV OF TECH
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