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Poly(2-hydroxyethyl methacrylate) and anion exchange membrane for vanadium battery

A polyhydroxyethyl methacrylate and anion exchange membrane technology, applied in the field of electrochemical materials, can solve the problems of complex process, high production cost and high surface resistance, and achieve easy, environment-friendly, low cost and good vanadium resistance performance. Effect

Inactive Publication Date: 2012-05-02
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent CN1770503A discloses a polyvinylidene fluoride film doped with inorganic nano-fillers as a matrix, and an organic acid with a sulfonate group is introduced into the matrix to obtain the target product through self-polymerization. The conductivity of the film reaches the order of 10-2S / cm , the vanadium ion permeability reaches 10-7cm2 / min; Qiu Xinping and others from Tsinghua University used Nafion membrane as the substrate to prepare multi-layer membranes for all-vanadium redox flow batteries by self-assembly method, but the production cost is high and the process is relatively complicated. complex
Chinese patent CN101931070 discloses a method for preparing an organic-inorganic composite proton exchange membrane suitable for an all-vanadium redox battery. First, a sulfonated polymer is prepared from a sulfuric acid sulfonated polymer, and then dissolved by adding a heteropolyacid to obtain a synthetic proton exchange membrane. Membrane liquid, and then use polypropylene lithium-ion battery separator as a reinforced membrane to make a sulfonated polymer / heteropolyacid / polypropylene composite membrane. The composite membrane has good vanadium resistance performance, but its water content is high and the surface resistance ratio NafionHigh

Method used

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  • Poly(2-hydroxyethyl methacrylate) and anion exchange membrane for vanadium battery
  • Poly(2-hydroxyethyl methacrylate) and anion exchange membrane for vanadium battery
  • Poly(2-hydroxyethyl methacrylate) and anion exchange membrane for vanadium battery

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A synthetic method for polyhydroxyethyl methacrylate, comprising the following steps:

[0049] (1) In the round bottom flask, add 1mmol 4-bromomethylbenzophenone, 50mmol hydroxyethyl methacrylate, 1mmol cuprous bromide, 1mmol pentamethyldiethylenetriamine and 6.0g toluene solution, to react The system was subjected to liquid nitrogen freezing-vacuumizing-argon filling-thawing repeated operation 3 times, and the system was sealed after 10 minutes of argon gas. The reaction was carried out at 20°C for 5 hours. Terminate the reaction, centrifuge the reaction product, take the precipitate, and wash the precipitate to obtain polytrimethyl-terminated hydroxyethyl methacrylate (PHEMA-tmsn); wherein n is 30.

[0050] (2) Dissolve 1mmol PHEMA-tmsn in 10ml tetrahydrofuran, add 0.1ml 1mol / L hydrochloric acid solution for hydrolysis, react at 30°C for 3 hours, centrifuge the reaction product, take the precipitate, wash the precipitate, and obtain polyhydroxyethyl methacrylate (PH...

Embodiment 2

[0060] A synthetic method for polyhydroxyethyl methacrylate, comprising the following steps:

[0061] (1) In the round bottom flask, add 1mmol 1-phenylethyl chloride, 100mmol hydroxyethyl acrylate, 3mmol cuprous bromide, 3mmol pentamethyldiethylenetriamine and 11.6g anisole solution, and carry out the reaction system Liquid nitrogen freezing-vacuumizing-filling with argon-thawing operation repeated 3 times, argon for 10 minutes and then sealed. The reaction was carried out at 50° C. for 8 hours. Terminate the reaction, centrifuge the reaction product, take the precipitate, and wash the precipitate to obtain polytrimethyl-terminated hydroxyethyl acrylate (PHEA-tmsn); wherein n is 70.

[0062] (2) Dissolve 1mmol PHEA-tmsn in 10ml dioxane, add 0.1ml 1mol / L hydrochloric acid solution for hydrolysis, react at 30°C for 6 hours, centrifuge the reaction product, take the precipitate, wash the precipitate, and obtain polyhydroxyethyl acrylate Esters (PHEAn).

[0063] (3) Dissolve 1m...

Embodiment 3

[0072] A synthetic method for polyhydroxyethyl methacrylate, comprising the following steps:

[0073] (1) In the round bottom flask, add 1mmol 1-phenylethyl chloride, 400mmol hydroxyethyl methacrylate, 8mmol cuprous chloride, 8mmol 2'2-bipyridyl and 52.1g anisole solution, and the reaction system Perform liquid nitrogen freezing-vacuumizing-filling with argon-thawing repeatedly 3 times, and seal it after argon gas for 10 minutes. The reaction was carried out at 80° C. for 15 hours. Terminate the reaction, centrifuge the reaction product, take the precipitate, and wash the precipitate to obtain polytrimethyl-terminated hydroxyethyl acrylate (PHEMA-tmsn); wherein n is 280.

[0074] (2) Dissolve 1mmol PHEMA-tmsn in 10ml pyridine, add 0.1ml 1mol / L hydrochloric acid solution for hydrolysis, react at 30°C for 9 hours, centrifuge the reaction product, take the precipitate, wash the precipitate to obtain polyhydroxyethyl methacrylate (PHEMAn).

[0075] (3) Dissolve 1mmol PHEMAn in ...

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Abstract

The invention discloses poly(2-hydroxyethyl methacrylate) and an anion exchange membrane for a vanadium battery. Poly(2-hydroxyethyl methacrylate) has a structure as shown in the formula (I). The substrate of the anion exchange membrane for the vanadium battery is a hydrophobic porous membrane, the surface of which is covered with a layer of poly(2-hydroxyethyl methacrylate). Poly(2-hydroxyethyl methacrylate) provided by the invention can be prepared into a membrane which can be used in the field of vanadium redox flow batteries, and has good vanadium resistance, proton conductivity, mechanical properties, chemical stability and film forming performance. The membrane conductivity reaches the magnitude of 10<-2>s / cm. The vanadium ion permeability reaches 10<-7>cm<2> / min. In addition, the preparation method of the anion exchange membrane for the vanadium battery has advantages of simple and practicable preparation process and low cost, is suitable for industrial production, and is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of electrochemical materials, in particular to vanadium battery materials, in particular to a polyhydroxyethyl methacrylate containing cinnamyl ester groups and quaternary ammonium groups and an anion exchange membrane for vanadium batteries prepared therefrom. Background technique [0002] Vanadium battery is called vanadium redox flow battery `Vanadium Redox Battery, abbreviated as VRB), referred to as vanadium battery, is a kind of redox battery in which the active material is in a circulating liquid state. Reduction reaction is used to realize energy conversion. The active substance participating in the reaction is liquid vanadium ions. Its power is determined by the stack, and its capacity is determined by the electrolyte, which increases the flexibility of battery design. Vanadium battery is a liquid flow energy storage battery with high efficiency, environmental protection, large capacity, high current charge a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/04C08F120/28C08F8/44C08F8/20C08F8/14C08J5/22C08J7/16H01M8/02
CPCY02E60/50
Inventor 胡继文卢汝烽
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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