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A kind of sulfonated polyarylether sulfone and all-vanadium redox flow battery blend membrane and preparation method thereof

A sulfonated polyaryl ether sulfone, all-vanadium flow battery technology, applied in the field of ion exchange membrane, can solve the problems of poor dimensional stability, low membrane mechanical strength, damage, etc., and achieves strong dimensional stability, low price, and mechanical strength. big effect

Active Publication Date: 2016-06-01
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its dimensional stability is poor, and in the actual operation of vanadium batteries, the membrane is damaged due to low mechanical strength

Method used

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  • A kind of sulfonated polyarylether sulfone and all-vanadium redox flow battery blend membrane and preparation method thereof
  • A kind of sulfonated polyarylether sulfone and all-vanadium redox flow battery blend membrane and preparation method thereof
  • A kind of sulfonated polyarylether sulfone and all-vanadium redox flow battery blend membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of sulfonated polyaryl ether sulfone with chlorosulfonic acid, specifically as follows:

[0035] (1) At room temperature, add 1g of polyarylethersulfone (PAES) into a 150mL single-necked bottle, add 50mL of dichloromethane, and magnetically stir to dissolve;

[0036] (2) Weigh 1 mL of chlorosulfonic acid, add 10 mL of dichloromethane to make a solution, then slowly drop the prepared solution into a single-necked flask, react at room temperature for 15 hours, and the sulfonation is completed. There is precipitation in the reaction mixture, pour out dichloromethane, add 15mL of DMAc, stir to make it fully dissolved, then add acetone, separate the precipitate and wash until neutral, and dry the product to constant weight to obtain a sulfonated polyarylene with a sulfonation degree of 12.6%. Ethersulfone (SPAES).

[0037] Among them, the titration method is used to measure the sulfonation degree (DS) of sulfonated polyarylethersulfone (SPAES).

[0038...

Embodiment 2

[0044] A preparation method of sulfonated polyaryl ether sulfone with chlorosulfonic acid, specifically as follows:

[0045] (1) At room temperature, add 1g of polyarylethersulfone (PAES) into a 150mL single-necked bottle, add 50mL of dichloromethane, and magnetically stir to dissolve;

[0046](2) Weigh 2 mL of chlorosulfonic acid, add 10 mL of dichloromethane to make a solution, then slowly drop the prepared solution into a single-necked flask, react at room temperature for 20 hours, and the sulfonation is completed. There is precipitation in the reaction mixture, pour out dichloromethane, add 15mL of DMAc, stir to make it fully dissolved, then add acetone, separate the precipitate and wash until neutral, and dry the product to constant weight to obtain a sulfonated polyarylene with a sulfonation degree of 52%. Ethersulfone (SPAES).

Embodiment 3

[0048] A preparation method of sulfonated polyaryl ether sulfone with chlorosulfonic acid, specifically as follows:

[0049] (1) At room temperature, add 1g of polyarylethersulfone (PAES) into a 150mL single-necked bottle, add 50mL of dichloromethane, and magnetically stir to dissolve;

[0050] (2) Weigh 1.7mL of chlorosulfonic acid, add 10mL of dichloromethane to make a solution, then slowly drop the prepared solution into a single-necked flask, react at room temperature for 15 hours, and the sulfonation is completed. There is precipitation in the reaction mixture, pour out dichloromethane, add 15mL of DMAc, stir to make it fully dissolved, then add acetone, separate the precipitate and wash until neutral, and dry the product to constant weight to obtain a sulfonated polyarylene with a sulfonation degree of 50%. Ethersulfone (SPAES).

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Abstract

The invention discloses sulfonated polyarylethersulfone and a blend membrane used for vanadium redox flow batteries and preparation method thereof, the preparation method of sulfonated polyarylethersulfone comprises the following steps: mixing polyether sulphone containing a repetition unit in a formula I and chlorosulfonic acid according to 1: 1-1:2w / v, Reacting for 5-25 hours at 18-30 DEG C to obtain sulfonated polyarylethersulfone containing a repetition unit in a formula II; the preparation method of the blend membrane comprises the following steps: mixing sulfonated polyarylethersulfone and polyvinylidene fluoride, adding an organic solvent until the mass percentage of sulfonated polyarylethersulfone and polyvinylidene fluoride are respectively 10-35% and 1-12%, stirring for dissolving, filtering, deaerating, and coating on a glass plate, insulating at 50-80 DEG C, insulating at 95-105 DEG C, and cooling to room temperature to obtain the blend membrane. The preparation method has the advantages of low price of raw materials and simple technology, and can greatly reduce the cost of a diaphragm; the prepared blend membrane has the advantages of strong mechanical strength, high size stability and strong wear resistance, and the blend membrane is suitable for long-term operation of vanadium cells and is in favor of commercialization.

Description

technical field [0001] The invention relates to the field of ion exchange membranes for all-vanadium redox flow batteries, in particular to a blend membrane for sulfonated polyarylether sulfone and all-vanadium redox flow batteries and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the contradiction between energy, resources and environmental protection has become increasingly prominent, prompting the urgent transformation of the traditional energy system to renewable energy. [0003] Adjusting the current power energy structure and developing large-scale utilization of renewable clean energy such as wind energy and solar energy have become the basic national policies for the development of electric energy in my country. The power generation process of renewable energy such as wind energy and solar energy is discontinuous and unstable. It needs to be equipped with power storage devices to achieve continuous and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/20C08L81/06C08L27/16H01M8/02H01M8/18
CPCY02E60/50Y02P70/50
Inventor 魏增福刘世念苏伟钟国彬李欣
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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