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Preparation method of ion exchange membrane used in vanadium battery

An ion exchange membrane, vanadium battery technology, applied in fuel cells, regenerative fuel cells, circuits, etc., can solve the problems of anion exchange membrane human body and environmental hazards, improve chemical stability and mechanical properties, low vanadium ion permeability , the effect of low equipment requirements

Active Publication Date: 2016-09-07
深圳市益达兴科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chloromethyl ether is a highly toxic substance, which makes the preparation of anion exchange membranes very harmful to the human body and the environment.

Method used

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  • Preparation method of ion exchange membrane used in vanadium battery
  • Preparation method of ion exchange membrane used in vanadium battery
  • Preparation method of ion exchange membrane used in vanadium battery

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preparation example Construction

[0030] The embodiment of the present invention discloses a preparation method of an ion exchange membrane for a vanadium battery, comprising the following steps: adding tetrabutylammonium bromide, an aqueous solution of sodium hydroxide and 1,4-butanesulfonic acid to the DMSO solution of the polycondensate The DMSO solution of the lactone is stirred for 5-8 hours under a nitrogen atmosphere, filtered, washed, recrystallized, and dried to obtain a sulfonated polycondensate, which is selected from one or more of formula 1 and formula 2 ,

[0031]

[0032] Formula 1),

[0033]

[0034] Formula 2,

[0035] Wherein, wherein, any integer in n=24-36, any integer in t=25-36; the polymerization type imidazolium salt ionic liquid monomer, styrene and initiator are mixed, heated under the protection of inert gas React for 1-3 hours, precipitate, wash, dry, and then dissolve in N,N-dimethylformamide to obtain a 2%-5% solution, drop it on a polytetrafluoroethylene plate, and obtain...

Embodiment 1

[0057] (1) Sulfonation of polycondensate: the polycondensate shown in 100g formula 1 is dissolved in 1.5L DMSO solution, and 4g tetrabutylammonium bromide is added therein, the aqueous solution (concentration 50wt%) of 150mL sodium hydroxide and 625mL DMSO solution of 1,4-butane sultone (concentration 2mol / L,), the above mixture was stirred at room temperature under nitrogen atmosphere for 5 hours, the product was filtered, washed with acetone and ethanol, recrystallized, dried and other steps. get,

[0058]

[0059] Formula 1)

[0060] Wherein, any integer in n=24-36;

[0061] (2) Polymer addition synthesis: in the reaction vessel, add the mixture of the polymeric imidazolium salt ionic liquid monomer shown in 75g formula 3, 25g styrene and 1g azobisisobutyronitrile (AIBN), after feeding Under the protection of an inert gas, heat the reaction for 3 hours to obtain the product; the obtained product is precipitated, washed, and dried in a vacuum oven at 80°C for 10 hours, ...

Embodiment 2

[0066] (1) Sulfonation of polycondensate: the polycondensate shown in 100g formula 2 is dissolved in 1.5L DMSO solution, and 4g tetrabutylammonium bromide is added therein, the aqueous solution (concentration 50wt%) of 150mL sodium hydroxide and 625mL DMSO solution of 1,4-butane sultone (concentration 2mol / L,), the above mixture was stirred at room temperature under nitrogen atmosphere for 5 hours, the product was filtered, washed with acetone and ethanol, recrystallized, dried and other steps. get,

[0067]

[0068] Formula 2)

[0069] Wherein, t=any integer in 25-36. ;

[0070] (2) Polymer addition synthesis: in the reaction vessel, add the mixture of the polymeric imidazolium salt ionic liquid monomer shown in 75g formula 3, 25g styrene and 1g azobisisobutyronitrile (AIBN), after feeding Under the protection of an inert gas, heat the reaction for 3 hours to obtain the product; the obtained product is precipitated, washed, and dried in a vacuum oven at 80°C for 10 hour...

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Abstract

The invention provides a preparation method of an ion exchange membrane used in a vanadium battery. The preparation method comprises the steps of dissolving sulfonated polycondensate and a sulfonated addition polymer in a first solvent; pouring at 60-80 DEG C for membrane formation so as to obtain the ion exchange membrane used in the vanadium battery. Compared with the prior art, the ion exchange membrane prepared by the method abovementioned has the characteristics of a polymer imidazole salt ionic liquid membrane and a polycondensate membrane; the polymer imidazole salt ionic liquid membrane and the polycondensate membrane are cross-linked through an ionic bond to further improve the chemical stability and mechanical property thereof; and the ionic bond is good for formation of an ionic channel, so that the ionic conductivity thereof is also ensured while good mechanical property and good chemical stability are ensured. According to the preparation method of the ion exchange membrane used in the vanadium battery, use of chloromethyl ether and concentrated sulfuric acid is avoided, and damage to a human body and the environment is reduced. The prepared ion exchange membrane used in the vanadium battery has relatively low vanadium ion permeability, relatively high ionic conductance and chemical stability and relatively good mechanical property. In addition, the preparation method of the membrane is simple in preparation and low in price, and has low requirements on equipment.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of an ion exchange membrane for a vanadium battery. Background technique [0002] With the development of the national economy and the deepening of human understanding of environmental pollution, energy crisis and other issues, people are paying more and more attention to the development of renewable and clean energy. Wind energy, solar energy, and water energy are typical representatives of renewable new energy sources, and have become the powerful vitality of the dominant energy source in the 21st century. However, the randomness, indirectness and uncontrollability of green energy such as wind energy, solar energy, and water energy have restricted their wider application. Therefore, the development of efficient and feasible large-scale energy storage technology is particularly important to utilize the power generation system and achieve continuou...

Claims

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Application Information

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IPC IPC(8): H01M8/18
CPCH01M8/184Y02E60/50
Inventor 魏亮
Owner 深圳市益达兴科技股份有限公司
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