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Polymer-metal-MOF-ionic liquid composite alkaline anion exchange membrane and preparation method thereof

An alkaline anion, ionic liquid technology, used in fuel cells, electrochemical generators, electrical components, etc., can solve problems such as performance degradation and chemical stability degradation, and achieve the effect of improving service life and breaking through performance degradation over time.

Pending Publication Date: 2022-04-08
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at higher temperatures (>60°C), high concentrations of OH - It will attack the cationic groups or defect sites in the material, resulting in the reduction of the chemical stability of the basic anion exchange membrane and the degradation of the material, so that the performance of the basic anion exchange membrane will gradually decrease with the increase in the number of uses

Method used

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  • Polymer-metal-MOF-ionic liquid composite alkaline anion exchange membrane and preparation method thereof
  • Polymer-metal-MOF-ionic liquid composite alkaline anion exchange membrane and preparation method thereof
  • Polymer-metal-MOF-ionic liquid composite alkaline anion exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 2,6-bis(4-1H-pyrazolyl)-1,3,5,7-pyromellitic acid diimide (H 2 MPDI) (0.0191 g, 0.05 mmol) and isophthalic acid (0.025 g, 0.12 mmol) were dissolved in 2 mL of DMF, and the solution became clear after stirring for 5 minutes.

[0041] Cu(NO 3 ) 2 ·3H 2 O (0.0242 g, 0.1 mmol) was dissolved in 2 mL of DMF and the solution became clear after stirring for 5 min.

[0042] After mixing the above two mixed solutions evenly, continue to add 1mL methanol and 0.1mL 1mol / L hydrochloric acid solution, stir evenly and react at 150°C for 3 days to obtain red crystal Cu-MOF.

[0043] The ionic liquid 1-methyl-3-vinylimidazole hydroxide was dissolved in ethanol to form a 1 mol / L ionic liquid solution.

[0044] The red crystals were dispersed in 10 mL of the above ionic liquid solution, configured as an ionic liquid with a mass percentage of 4%, and centrifuged at 10,000 rpm for 10 minutes to obtain Cu-MOF@ionic liquid.

[0045] After dissolving 2g of PVA in distilled water at 90°C, ...

Embodiment 2

[0047] 2,6-bis(4-1H-pyrazolyl)-1,3,5,7-pyromellitic acid diimide (H 2 MPDI) and isophthalic acid are dissolved in the DMF of 2mL, and its ratio is as shown in Table 1. The solution became clear after stirring for 5 minutes.

[0048] Cu(NO 3 ) 2 ·3H 2 O (0.0242 g, 0.1 mmol) was dissolved in 2 mL of DMF and the solution became clear after stirring for 5 min.

[0049] After mixing the above two mixed solutions evenly, continue to add 1mL methanol and 0.1mL 1mol / L hydrochloric acid solution, stir evenly and react at 150°C for 3 days to obtain red crystal Cu-MOF.

[0050] The ionic liquid 1-methyl-3-vinylimidazole hydroxide was dissolved in ethanol to form a 1 mol / L ionic liquid solution.

[0051] The red crystals were dispersed in 10 mL of the above ionic liquid solution, configured as an ionic liquid with a mass percentage of 4%, and centrifuged at 10,000 rpm for 10 minutes to obtain Cu-MOF@ionic liquid.

[0052] After dissolving 2g of PVA in distilled water at 90°C, add Cu...

Embodiment 3

[0057] 2,6-bis(4-1H-pyrazolyl)-1,3,5,7-pyromellitic acid diimide (H 2 MPDI) (0.0191 g, 0.05 mmol) and isophthalic acid (0.025 g, 0.12 mmol) were dissolved in 2 mL of DMF, and the solution became clear after stirring for 5 minutes.

[0058] Taking different masses of Cu(NO 3 ) 2 ·3H 2 O was dissolved in 2mL of DMF, and its ratio was shown in Table 2. The solution became clear after stirring for 5 minutes.

[0059] After mixing the above two mixed solutions evenly, continue to add 1mL methanol and 0.1mL 1mol / L hydrochloric acid solution, stir evenly and react at 150°C for 3 days to obtain red crystal Cu-MOF.

[0060] The ionic liquid 1-methyl-3-vinylimidazole hydroxide was dissolved in ethanol to form a 1 mol / L ionic liquid solution.

[0061] The red crystals were dispersed in 10 mL of the above ionic liquid solution, configured as an ionic liquid with a mass percentage of 4%, and centrifuged at 10,000 rpm for 10 minutes to obtain Cu-MOF@ionic liquid.

[0062] After dissol...

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Abstract

According to the polymer-metal-MOF-ionic liquid composite alkaline anion exchange membrane and the preparation method thereof, from the perspective of structural design, the mechanical advantages of a polymer, the structural advantages of MOFs and the combined action of multiple materials are integrated, high-alkali-resistance porous MOF serves as a container, an OH-conduction carrier is introduced into holes of the container, and high OH-conduction is achieved; a high-molecular polymer monomer is introduced as a film forming substrate, the mechanical property of the film is regulated and controlled, the defect that the film forming property of an MOF crystalline material is poor is overcome, and the high OH <-> conductivity with the highest OH <-> conductivity reaching 0.122 S / cm is obtained. And the material can realize rapid recovery of OH <-> conduction performance through a simple copper ion soaking method, breaks through the fate that the performance of an alkaline anion exchange membrane is attenuated along with time and is disposable, and is expected to prolong the service life of a fuel cell.

Description

technical field [0001] The invention belongs to the technical field of alkaline fuel cells, and specifically relates to a preparation method of a polymer@metal-MOF@ionic liquid composite alkaline anion exchange membrane. Background technique [0002] Fuel cells have a high specific energy density and can directly and continuously convert the chemical energy in fuels and oxidants into electrical energy. They are recognized as the most promising clean energy in the 21st century and will shoulder the great responsibility of a new generation of energy innovation and breakthroughs. Among them, the alkaline fuel cell is a kind of fuel cell. When working under alkaline conditions, the reduction kinetics of cathode oxygen becomes faster, and the activation polarization loss is greatly reduced, so that non-precious metal catalysts such as: Ag, Ni, Co The use of etc. becomes possible, and thus is subject to more extensive research. Alkaline anion exchange membranes, as the core compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08L29/04C08L87/00C08K5/3445C08G83/00H01M8/083
CPCY02E60/50
Inventor 李子银周永南刘世文葛元宇胡小赛
Owner YANCHENG INST OF TECH
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