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Preparation method of metal-organic framework material/polymer composite proton exchange membrane

A metal-organic framework, proton exchange membrane technology, used in fuel cells, regenerative fuel cells, electrochemical generators, etc., can solve the problems of thin film structure defects, affecting performance, etc., to achieve regular internal structure of the membrane, no defects in membrane thickness, The effect of uniform film thickness

Active Publication Date: 2016-07-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These polymer films have good stability, convenient operation, and simple process, but structural defects are prone to occur in the film during the preparation process, which affects the final performance.
[0004] Metal-organic framework materials (Metal-organic Frameworks, referred to as MOF) have received extensive attention from researchers. It has a porous structure and very rich internal pores, which makes the application of MOF materials quite broad, but it is reported that it is used in proton exchange membranes. still very little

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 0.01g of MOF-5, 1g of sulfonated polyimide and 1g of polyvinyl alcohol in a conical flask, add 24g of dimethyl sulfoxide, heat and stir at 80°C for 48h, and then sonicate at room temperature for 2h to prepare a uniformly dispersed membrane liquid . The film solution was coated on the flat and smooth surface of the glass plate, the solvent was dried with an infrared lamp, and then placed in a vacuum at 100°C for 24 hours to obtain a composite film with a thickness of 60 μm.

Embodiment 2

[0027] Put 0.1g of ZIF-8 and 2g of polytetrafluoroethylene in a conical flask, add 19g of dimethylformamide, heat and stir at 80°C for 48h, then sonicate at room temperature for 2h to prepare a uniformly dispersed film solution. The film solution was coated on the flat and smooth surface of the glass plate, quickly put into water to replace the solvent, and then placed in a vacuum at 100°C for 24 hours to obtain a composite film with a thickness of 100 μm.

Embodiment 3

[0029] Put 1g of MIL-101 and 2g of sulfonated polyethersulfone ketone into a conical flask, add 10g of N-methylpyrrolidone, heat and stir at 80°C for 48h, and then sonicate at room temperature for 2h to prepare a uniformly dispersed membrane solution. The film solution was coated on the flat and smooth surface of the glass plate, the solvent was dried with an infrared lamp, and then placed in a vacuum at 100°C for 24 hours to obtain a composite film with a thickness of 20 μm.

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Abstract

The invention relates to a preparation method of a metal-organic framework material / polymer composite proton exchange membrane. The method is characterized by comprising the following steps: dissolving a polymer matrix and a certain amount of metal-organic framework material with an organic solvent and carrying out ultrasonic dispersion to form a uniform membrane liquid; coating the flat and smooth surface of a glass plate with the obtained membrane liquid, and then removing the organic solvent to obtain a composite membrane; and carrying out vacuum drying on the composite membrane for 24 hours to prepare the composite proton exchange membrane for an all-vanadium redox flow battery. The composite proton exchange membrane is smooth in surface; the internal structure of the membrane is regular; the membrane is uniform in thickness and free of a defect; and the thickness is 10-300 microns. The composite proton exchange membrane provided by the invention has excellent vanadium ion permeation blocking ability, keeps excellent proton transfer performance, overcomes the defect of relatively high vanadium ion permeability of an existing all-vanadium redox flow battery membrane, and has the advantages of being simple in preparation process, high in proton transmittance, excellent in vanadium blocking property, excellent in oxidative resistance, easy to industrially amplify and the like.

Description

technical field [0001] The invention relates to the field of proton exchange membrane preparation, in particular to a method for preparing a metal organic framework material / polymer composite proton exchange membrane used in an all-vanadium redox flow battery. Background technique [0002] At present, the global energy and environmental problems are becoming more and more serious, which has become a bottleneck restricting the economic and social development of countries around the world. Vigorously developing clean and efficient renewable energy, such as wind energy, solar energy, water energy and geothermal energy, has become a solution to energy problems. However, due to the limitation of natural conditions, the power generation of wind energy and solar energy varies significantly with the change of day and night, and it is difficult to maintain a stable power output. It needs to cooperate with a certain scale of power storage devices to ensure continuous and stable power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1081H01M8/18
CPCH01M8/1081H01M8/188Y02E60/50
Inventor 王丽华刘帅刘必前
Owner INST OF CHEM CHINESE ACAD OF SCI
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