Sulfonated polyarylether polymer ion exchange membrane containing crosslinking groups and application thereof

A technology of ion exchange membrane and sulfonated polyarylether, which is applied in the application field of polymer ion exchange membrane in all-vanadium flow energy storage battery, can solve the problem of oxidation stability and other problems, and achieve good solubility and processing performance, good thermal and mechanical stability, and the effect of improving the selectivity of vanadium ions

Inactive Publication Date: 2011-07-13
DALIAN RONGKE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the polymer membrane materials mentioned above have been widely used in fuel cells, there are few reports in flow batteries

Method used

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  • Sulfonated polyarylether polymer ion exchange membrane containing crosslinking groups and application thereof
  • Sulfonated polyarylether polymer ion exchange membrane containing crosslinking groups and application thereof
  • Sulfonated polyarylether polymer ion exchange membrane containing crosslinking groups and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Add m mol of 1,4-bis(3-sulfonate sodium-4-fluoro-benzoyl)benzene, k mol of 4,4'-bis(4-fluoro-benzoyl)benzene, m+k mol of 3,3'4,4'-tetramethylbiquinone and m+k mol of anhydrous potassium carbonate were added to a three-necked flask equipped with mechanical stirring and a thermometer. Nitrogen protection, DMSO (NMP, TMS, DMAC can also be used) as a solvent (solid content 30wt%), toluene as a water-carrying agent, carry water at 140 ° C for 4 hours, then distill the toluene and heat up to 180 ° C to react 6 Hour. Pour the mixture into acetone, pulverize it in a 50wt% aqueous solution with a pulverizer, filter under reduced pressure, boil the obtained solid directly with acetone, reflux, and filter, repeat 5-6 times, then boil and filter with distilled water, repeat 5-6 times 6 times, dry in oven, obtain copolymer, productive rate is about 95%, (can adjust the sulfonation degree of polymkeric substance by adjusting the ratio of m and k, concrete sulfona...

Example Embodiment

[0033] Example 2

[0034] The polymer prepared in Example 1 was dissolved in DMF to form a 10wt% solution, and the resulting solution was cast on a glass plate or a stainless steel plate, dried at 60 for 5 hours, and then vacuum-dried at 80°C for 12 hours to form a film with a thickness of 90 μm about. Soak the prepared membrane in 1M sulfuric acid solution for 24 hours to obtain an ion exchange membrane. The prepared ion exchange membrane was assembled into an all-vanadium redox flow energy storage battery, the catalytic layer was activated carbon felt, the bipolar plate was graphite plate, and the effective area of ​​the membrane was 9cm -2 , with a current density of 50mA cm -2 , the vanadium ion concentration in the electrolyte is 1.50mol L -1 , H 2 SO 4 The concentration is 3mol L -1 . In Example 1, the current efficiency of the ion exchange membrane assembled battery with the sulfonation degree of 0.8 is 98.5%, the voltage efficiency is 88.8%, and the energy effic...

Example Embodiment

[0035] Example 3

[0036] Add m mol of 1,4-bis(3-sulfonate sodium-4-fluoro-benzoyl)benzene, k mol of 4,4'-bis(4-fluoro-benzoyl)benzene, m+k mol of allyl bisphenol A and m+k mol of anhydrous potassium carbonate were added to a three-necked flask equipped with mechanical stirring and a thermometer. Nitrogen protection, DMSO (NMP, TMS, DMAC can also be used) as a solvent (solid content 30wt%), toluene as a water-carrying agent, carry water at 140 ° C for 4 hours, then distill the toluene and heat up to 180 ° C for 6 hours . Pour the mixture into acetone, crush it in 50wt% aqueous solution with a pulverizer, filter under reduced pressure, boil the solid directly with acetone, reflux, and filter, repeat 5-6 times, then boil and filter with distilled water, repeat 5-6 times , drying in an oven to obtain a copolymer with a yield of about 95%, (the degree of sulfonation of the polymer can be adjusted by adjusting the ratio of m and k, the specific degree of sulfonation is shown in T...

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Abstract

The invention relates to a sulfonated polyarylether polymer ion exchange membrane containing crosslinking groups and application thereof to a liquid flow energy storage battery of acidic electrolyte. The ion exchange membrane provided by the invention is mild in preparation conditions and easy for batch production. The prepared ion exchange membrane has favorable mechanical performance and simultaneously has favorable proton conductivity and excellent performance of blocking vanadium ions from infiltrating in a full-vanadium liquid flow energy storage battery. In addition, the chemical stability and the vanadium blocking performance of the ion exchange membrane can be further improved through a crosslinking reaction.

Description

technical field [0001] The invention relates to a sulfonated polyarylether polymer ion-exchange membrane containing crosslinking groups and its application in acid electrolyte flow energy storage batteries, in particular to the use of this type of polymer ion-exchange membrane in all-vanadium liquid Applications in flow energy storage batteries. Background technique: [0002] Flow energy storage battery containing acid electrolyte is a new electrochemical energy storage technology with high energy conversion efficiency, flexible system design, large storage capacity, free site selection, deep discharge, safety and environmental protection, and low maintenance cost. It is one of the preferred technologies for large-scale and efficient energy storage technology. In particular, all-vanadium flow energy storage batteries are considered to be the most promising and representative of flow energy storage batteries due to their high safety, good stability, high efficiency, long lif...

Claims

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Application Information

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IPC IPC(8): C08L71/12C08G65/40C08J5/18H01M8/02H01M2/16H01M8/0221H01M8/18
CPCY02E60/12Y02E60/50
Inventor 张华民李先锋史丁秦张洪章
Owner DALIAN RONGKE POWER
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