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Amphoteric polyether-ether-ketone organic matter and preparation method thereof, amphoteric polyether-ether-ketone ion exchange membrane and iron-chromium redox flow battery

A technology of ion-exchange membrane and polyetheretherketone, which is applied in the field of iron-chromium redox flow battery, can solve the problems of area specific resistance, ion-exchange membrane cannot have chemical stability, etc., and achieve good performance of blocking iron and chromium ions , Improve the proton transmission ability, reduce the effect of resistance

Pending Publication Date: 2022-01-07
STATE POWER INVESTMENT CORP RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide an amphoteric polyetheretherketone organic compound and its preparation method, an amphoteric polyether ether ketone ion exchange membrane and an iron-chromium redox flow battery to solve the problem that the existing ion exchange membrane cannot have good chemical stability and the problem of low area specific resistance

Method used

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  • Amphoteric polyether-ether-ketone organic matter and preparation method thereof, amphoteric polyether-ether-ketone ion exchange membrane and iron-chromium redox flow battery
  • Amphoteric polyether-ether-ketone organic matter and preparation method thereof, amphoteric polyether-ether-ketone ion exchange membrane and iron-chromium redox flow battery
  • Amphoteric polyether-ether-ketone organic matter and preparation method thereof, amphoteric polyether-ether-ketone ion exchange membrane and iron-chromium redox flow battery

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preparation example Construction

[0030] The second aspect of the present application also provides a method for preparing the above-mentioned amphoteric polyether ether ketone organic compound. The preparation method of the amphoteric polyether ether ketone organic compound comprises: in the presence of water and an alcohol solvent, sulfonated polyether ether ketone Amination reaction with organic amine and formaldehyde to obtain amphoteric polyetheretherketone organic compound containing both sulfonic acid groups and amino groups, wherein the sulfonated polyether ether ketone has the following structure:

[0031]

[0032] Organic amines have the structure R 1 R 2 NH, where R 1 and R 2 and x have the same definition as above, and the degree of polymerization of the sulfonated polyether ether ketone and the amphoteric polyether ether ketone organic compound to be prepared should correspond.

[0033] Compared with the existing synthesis route of amphoteric polyetheretherketone, the preparation method prov...

Embodiment 1

[0053] In this example, the preparation method of the amphoteric polyether ether ketone ion exchange membrane for the iron-chromium redox flow battery is as follows:

[0054] (1) Sulfonation reaction:

[0055] Dissolve 10 g of polyetheretherketone (molecular weight: 20,000 to 30,000) in 100 mL of concentrated sulfuric acid, and raise the temperature to 60° C. for sulfonation for 1.5 h. After the reaction was completed, the temperature of the reaction solution was lowered to 0° C., and then slowly poured into deiced water to precipitate precipitates, which were collected by filtration and washed with ice water for several times. After suction filtration, it was dried in a vacuum oven at 60° C. for 24 hours to obtain sulfonated polyetheretherketone with a sulfonation degree of 68%, with a yield of 90-95%.

[0056] (2) Amination reaction:

[0057] At room temperature, mix 10 g of the above sulfonated polyetheretherketone with 140 ml of water and 60 ml of ethanol, then add 10 ti...

Embodiment 2

[0066] In this example, the preparation method of the amphoteric polyether ether ketone ion exchange membrane for the iron-chromium redox flow battery is as follows:

[0067] (1) Sulfonation reaction:

[0068]Dissolve 10 g of polyether ether ketone in 100 ml of concentrated sulfuric acid, and raise the temperature to 60° C. for sulfonation reaction for 2 hours. After the reaction was completed, the temperature of the reaction solution was lowered to 0° C., and then slowly poured into deiced water to precipitate precipitates, which were collected by filtration and washed with ice water for several times. After suction filtration, it was dried in a vacuum oven at 60° C. for 24 hours to obtain sulfonated polyetheretherketone with a sulfonation degree of 72%, with a yield of 90-95%.

[0069] (2) Amination reaction:

[0070] The specific steps are the same as in Example 1. Amphoteric polyetheretherketone with a sulfonation degree of 72% and an amination degree of 5% is obtained t...

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Abstract

The invention provides an amphoteric polyether-ether-ketone organic matter and a preparation method thereof, an amphoteric polyether-ether-ketone ion exchange membrane and an iron-chromium redox flow battery. The amphoteric polyether-ether-ketone organic matter comprises a chain segment A, a chain segment B and a chain segment C, R1 and R2 are independently selected from C1-C10 alkyl groups respectively, the molecular weight is 23000-38000, the sulfonation degree is 60-90%, and the amination degree is 1-5%. The amphoteric polyether-ether-ketone membrane provided by the invention has the advantages of good chemical stability, good iron and chromium ion resistance, high conductivity, good temperature resistance, great cost reduction and the like, and can be widely applied to the field of iron-chromium redox flow batteries.

Description

technical field [0001] The invention relates to an iron-chromium redox flow battery, in particular to an amphoteric polyether ether ketone organic compound and a preparation method, an amphoteric polyether ether ketone ion exchange membrane and an iron-chromium redox flow battery. Background technique [0002] As efficient large-scale energy storage devices, redox flow batteries (RFBs) have been used in combination with solar and wind energy for peak-shaving and valley-filling of power grids to overcome the instability and unsustainability of these renewable energy sources. Over the past few decades, there has been increasing interest in various emerging acidic aqueous redox flow batteries due to the flexibility in system design, high cycle reliability, and safety. Representative ones are all-vanadium redox flow batteries and iron-chromium flow batteries. The proton permeation selective membrane of RFB in acidic water system is one of the core components, which has two main...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08J5/22C08J7/14C08L61/16H01M8/18
CPCC08G8/28C08J5/2256C08J7/14H01M8/188C08J2361/16Y02E60/50
Inventor 张蓉孙璇王曙光贺高红焉晓明胡磊江小松
Owner STATE POWER INVESTMENT CORP RES INST
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