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Sulfonated poly (arylene ether sulfone), blend film for all-vanadium flow battery and preparation methods thereof

A technology of sulfonated polyarylethersulfone and all-vanadium redox flow battery, which is applied in the direction of fuel cells, battery pack parts, fuel cell parts, etc., can solve the problems of low mechanical strength, damage, and poor dimensional stability of the membrane. Achieve the effect of low price, strong dimensional stability and high mechanical strength

Active Publication Date: 2014-02-26
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Sulfonated poly (arylene ether sulfone), blend film for all-vanadium flow battery and preparation methods thereof
  • Sulfonated poly (arylene ether sulfone), blend film for all-vanadium flow battery and preparation methods thereof
  • Sulfonated poly (arylene ether sulfone), blend film for all-vanadium flow battery and preparation methods thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of preparation method of concentrated sulfuric acid sulfonated polyaryl ether sulfone, specifically as follows:

[0035] (1) Slowly add 10mL concentrated sulfuric acid into a 250mL three-neck flask, plug one mouth with a vacuum glass stopper, and adjust the stirrer to control a certain stirring speed for stirring;

[0036] (2) Then weigh 1g of dry polyarylethersulfone PAES powder and slowly add it into a three-necked beaker. Under the condition of electric stirring, at a temperature of 80°C, after sulfonation reaction for 5 hours, stop stirring, and let the reactant stand for a period of time. Sonicate to remove air bubbles. Then pour the sulfonated product into a 500mL separatory funnel and fix it on an iron stand. Use a separatory funnel to control the flow rate of the product, slowly pour it into a large amount of ice water under stirring conditions, the purple-red liquid turns into a white filament, stir it electrically for a certain period of time, and chan...

Embodiment 2

[0044] A kind of preparation method of concentrated sulfuric acid sulfonated polyaryl ether sulfone, specifically as follows:

[0045](1) Slowly add 20mL concentrated sulfuric acid into a 250mL three-necked flask, plug one mouth with a vacuum glass stopper, and adjust the stirrer to control a certain stirring speed for stirring;

[0046] (2) Then weigh 1g of dry PAES powder and slowly add it into a three-necked beaker. Under the condition of electric stirring, at a temperature of 85°C, after sulfonation reaction for 12 hours, stop stirring, let the reactant stand for a period of time, and use ultrasonic treatment to catch up. net air bubbles. Then pour the sulfonated product into a 500mL separatory funnel and fix it on an iron stand. Use a separatory funnel to control the flow rate of the product, slowly pour it into a large amount of ice water under stirring conditions, the purple-red liquid turns into a white filament, stir it electrically for a certain period of time, and ...

Embodiment 3

[0048] A kind of preparation method of concentrated sulfuric acid sulfonated polyaryl ether sulfone, specifically as follows:

[0049] (1) Slowly add 30mL concentrated sulfuric acid into a 250mL three-neck flask, plug one mouth with a vacuum glass stopper, and adjust the stirrer to control a certain stirring speed for stirring;

[0050] (2) Then weigh 1g of dry PAES powder and slowly add it into a three-necked beaker. Under the condition of electric stirring, at a temperature of 90°C, after sulfonation reaction for 25 hours, stop stirring, let the reactant stand for a while, and ultrasonically treat it to catch up. net air bubbles. Then pour the sulfonated product into a 500mL separatory funnel and fix it on an iron stand. Use a separatory funnel to control the flow rate of the product, slowly pour it into a large amount of ice water under stirring conditions, the purple-red liquid turns into a white filament, stir it electrically for a certain period of time, and change the ...

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Abstract

The invention discloses sulfonated poly (arylene ether sulfone), a blend film for an all-vanadium flow battery and preparation methods thereof. The preparation method of the sulfonated poly (arylene ether sulfone) is as follows: mixing poly (arylene ether sulfone) containing a type-I repeat unit with concentrated sulfuric acid in a ratio of 1:10-1:30w / v, reacting at 80-90 DEG C for 5-25h to obtain the sulfonated poly (arylene ether sulfone) containing a type-II repeat unit; the preparation method of the blend film is as follows: mixing the sulfonated poly (arylene ether sulfone) with polyvinylidene fluoride, adding an organic solvent to enable the mass fractions of the sulfonated poly (arylene ether sulfone) and the polyvinylidene fluoride respectively to be 10-35% and 1-12%, stirring for dissolving, filtering for defoaming, coating a glass plate, successively keeping warm at 50-80 DEG C and at 95-105 DEG C, and cooling to obtain the blend film. The preparation methods are low in price of used raw materials and simple in process, and greatly reduce the cost of the blend film. The prepared blend film has high mechanical strength and high dimensional stability and wear resistance, is suitable for long-term operation of the vanadium battery, and is conducive to commercialization.

Description

technical field [0001] 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 stable power output, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23C08L81/06C08L27/16H01M8/02H01M2/16H01M8/0221H01M50/411H01M50/417
CPCY02E60/50
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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