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Fluorine-containing polyarylether-based anion exchange membrane with low surface resistivity and high oxidation stability and preparation method of fluorine-containing polyarylether-based anion exchange membrane

An anion exchange membrane, high oxidation stability technology, applied in electrochemical generators, circuits, fuel cells, etc., to achieve the effect of low surface resistivity, simple reaction method, and improved ion conductivity

Pending Publication Date: 2020-09-15
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the use of fluorine-containing polyarylethers as framework materials for anion exchange membranes in all-vanadium redox flow batteries.

Method used

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  • Fluorine-containing polyarylether-based anion exchange membrane with low surface resistivity and high oxidation stability and preparation method of fluorine-containing polyarylether-based anion exchange membrane
  • Fluorine-containing polyarylether-based anion exchange membrane with low surface resistivity and high oxidation stability and preparation method of fluorine-containing polyarylether-based anion exchange membrane
  • Fluorine-containing polyarylether-based anion exchange membrane with low surface resistivity and high oxidation stability and preparation method of fluorine-containing polyarylether-based anion exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation of embodiment 1 fluorine-containing polyarylether compound FPAE-10

[0041] Add 0.2315 g (0.40 mmol) tetraamine bisphenol fluorene, 1.2615 g (3.60 mmol) bisphenol fluorene, 1.3500 g (4.00 mmol) decafluorobiphenyl and 8.50 mL N -Methylpyrrolidone, stir until the solid is completely dissolved, add 0.1250 g (3 mmol) of calcium hydride and 2.50 g (17 mmol) of cesium fluoride, and stir at room temperature for 24 hours under the protection of argon. After the reaction, the viscous mixture was poured into 500 mL of deionized water and stirred while pouring to precipitate the polymer, and the resulting white strip polymer was collected and dried in a vacuum oven at 60 °C for 12 hours, and then Dissolve 2.50 g of the obtained polymer in 30 mL of dichloromethane, then pour it into 500 mL of methanol, collect the precipitated flocculent polymer, and dry it in a vacuum oven at 60 °C for 12 hours to obtain tetraamine-based fluoropolymer Aryl ether compound FPAE-10, ...

Embodiment 2

[0042] Example 2 Preparation of fluorine-containing polyarylether compound FPAE-20

[0043] In Example 1, the feeding amount of tetraamine-based bisphenol fluorene was replaced by 0.4630 g (0.8 mmol), and the feeding amount of bisphenol fluorene was replaced by 1.1213 g (3.2 mmol). The rest of the steps were the same as in Example 1 to obtain tetraamine-based Fluorine-containing polyarylether compound FPAE-20, its yield is 95%.

Embodiment 3

[0044] Example 3 Preparation of dense diquaternary ammonium salt ion side chain type fluorine-containing polyarylether compound DQA-6C-FPAE-10

[0045] Dissolve 1.00 g (0.6 mmol) of the fluorine-containing polyarylether compound FPAE-10 obtained in Example 1 in 20 mL N- In methylpyrrolidone, make 5 wt.% solution A; then dissolve 2.73g (0.9 mmol) QA-6C in 30 mL N- Methylpyrrolidone, make 9 wt.% solution B; slowly drop solution B into solution A, stir the mixture at room temperature for 24 hours, then slowly pour it into deionized water to precipitate a precipitate, then filter and pour it on the surface In a dish, dry at 80°C for 12 hours to obtain the dense bisquaternary ammonium salt ion side chain type fluorine-containing polyarylether compound DQA-6C-FPAE-10, the yield rate is 96%, and the chemical structural formula is:

[0046] , where n is 1~400; m is 10~400.

[0047] The data of the proton nuclear magnetic resonance spectrum of this compound are: 1 HNMR (600MHz, DM...

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Abstract

The invention discloses a fluorine-containing polyarylether-based anion exchange membrane with low surface resistivity and high oxidation stability and a preparation method of the fluorine-containingpolyarylether-based anion exchange membrane. The preparation method comprises the following steps: carrying out polycondensation on tetramino bisphenol fluorene, bisphenol fluorene and decafluorobiphenyl at room temperature to synthesize a tetramino fluorine-containing polyarylether compound, and reacting the tetramino fluorine-containing polyarylether compound with a bromohexyl quaternary ammonium salt compound QA-6C to obtain a dense biquaternary ammonium salt ion side chain type fluorine-containing polyarylether compound; dissolving the obtained dense biquaternary ammonium salt ion side chain type fluorine-containing polyarylether compound into a polar aprotic solvent, and casting to form a membrane by adopting a solution casting method so as to obtain the fluorine-containing polyarylether-based anion exchange membrane with low surface resistivity and high oxidation stability. The surface resistivity of the fluorine-containing polyarylether-based anion exchange membrane under similar ion exchange capacity is lower than that of a common polyarylether-based anion exchange membrane, the oxidation stability of the fluorine-containing polyarylether-based anion exchange membrane is higher than that of the common polyarylether-based anion exchange membrane, and the fluorine-containing polyarylether-based anion exchange membrane has wide application prospects in all-vanadium redox flow batteries.

Description

technical field [0001] The invention belongs to the field of anion-exchange membrane material preparation, in particular to a fluorine-containing polyarylether-based anion-exchange membrane with low surface resistivity and high oxidation stability and a preparation method thereof. Background technique [0002] In recent years, all-vanadium redox flow batteries have attracted much attention in large-scale energy storage applications due to their low cost, fast response, high energy efficiency, good cycle stability, environmental protection, safety and flexibility. Anion-exchange membranes are an important class of all-vanadium redox flow battery separators. The anion exchange membrane mainly plays the role of selecting the charged ions in the electrolyte to form a battery circuit in the all-vanadium redox flow battery, and at the same time isolating the two-electrode electrolyte. At present, the anion exchange membranes used in all-vanadium redox flow batteries mainly have t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48C08G65/40H01M8/103H01M8/1039H01M8/1069H01M8/1072H01M8/1086H01M8/18
CPCC08G65/485C08G65/4025H01M8/1039H01M8/103H01M8/1069H01M8/1072H01M8/1086H01M8/188C08G2650/48C08G2650/50Y02E60/50
Inventor 陈栋阳李艳琰陈煜
Owner FUZHOU UNIV
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