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
CN111662446APending Publication Date: 2020-09-15FUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
FUZHOU UNIV
Publication Date
2020-09-15

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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.
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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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