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Preparation method of MOF/aramid nanofiber modified Nafion proton exchange membrane with beaded structure for fuel cell

A technology of nanofibers and fuel cells, applied in fuel cells, circuits, electrical components, etc., can solve the problems of lack of performance and poor interfacial compatibility of nanofiber composite proton exchange membranes, and reduce swelling and methanol penetration Sex, improve water retention capacity, good proton conductivity effect

Pending Publication Date: 2021-01-05
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems: the poor interfacial compatibility between the nanofiber filler and the matrix and the lack of transfer pathways and proton-conducting groups limit the further improvement of the performance of the nanofiber composite proton exchange membrane.

Method used

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  • Preparation method of MOF/aramid nanofiber modified Nafion proton exchange membrane with beaded structure for fuel cell
  • Preparation method of MOF/aramid nanofiber modified Nafion proton exchange membrane with beaded structure for fuel cell
  • Preparation method of MOF/aramid nanofiber modified Nafion proton exchange membrane with beaded structure for fuel cell

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Experimental program
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Effect test

Embodiment 1

[0026] Dissolve the aramid stock solution in N,N-dimethylacetamide and stir evenly, then add 2% tetrabutylammonium chloride to the mixed solution to prepare a 58wt% spinning solution, and then mix the formed The solution was stirred at high speed for 6 hours at room temperature to form a uniform and stable spinning solution. It is spun on a receiving roller by electrospinning, and the spinning voltage and receiving distance are 30kv and 17cm, respectively. An aramid nanofiber membrane with a thickness of 80 μm was prepared.

[0027] Soak the aramid nanofiber membrane in the cobalt nitrate aqueous solution for 12 hours, and then stir and mix it with the 2-methylimidazole aqueous solution, wherein the molar ratio of cobalt nitrate, 2-methylimidazole and water is 1:20:2228, and the solution turns purple After that, let it stand for 12 hours. The composite membrane was repeatedly washed with distilled water, and finally placed in a vacuum oven to dry at 60° C. to obtain a beaded...

Embodiment 2

[0030] Dissolve the aramid stock solution in N,N-dimethylacetamide and stir evenly, then add 3% tetrabutylammonium chloride to the mixed solution to prepare a 58wt% spinning solution, and then mix the formed mixed solution Stir at high speed for 6 hours at room temperature to form a uniform and stable spinning solution. It is spun on a receiving roll by electrospinning, and the spinning voltage and receiving distance are 31kv and 17cm, respectively. An aramid nanofiber membrane with a thickness of 90 μm was prepared.

[0031] First, cobalt nitrate and 2-methylimidazole were dissolved in 20ml of methanol solution, and the aramid nanofiber membrane was soaked in cobalt nitrate methanol solution for 12 hours, and then stirred and mixed with 2-methylimidazole methanol solution, wherein cobalt nitrate, 2- The molar ratio of methylimidazole was 1:30. After the solution turned purple, it was allowed to stand for 12 hours. The composite membrane was repeatedly washed with methanol, ...

Embodiment 3

[0034]Dissolve the aramid stock solution in N,N-dimethylacetamide and stir evenly, then add 3% tetrabutylammonium chloride to the mixed solution to prepare a 58wt% spinning solution, and then mix the formed The solution was stirred at high speed for 6 hours at room temperature to form a uniform and stable spinning solution. It is spun on a receiving roll by electrospinning, and the spinning voltage and receiving distance are 31kv and 17cm, respectively. An aramid nanofiber membrane with a thickness of 90 μm was prepared.

[0035] First, cobalt chloride and 2-methylimidazole were dissolved in 20ml of methanol solution, and the aramid nanofiber membrane was soaked in cobalt chloride methanol solution for 12 hours, and then stirred and mixed with 2-methylimidazole methanol solution, in which cobalt chloride , The molar ratio of 2-methylimidazole is 1:40, after the solution turns purple, let it stand for 12h. Wash the composite membrane repeatedly with ethanol, and finally place...

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Abstract

The invention provides an MOF / aramid nanofiber modified Nafion proton exchange membrane with a beaded structure and a preparation method. According to the method, aramid nanofibers are used as a carrier and soaked in a ZIF67 precursor solution, uniform nucleation and ordered growth of ZIF67 on the nanofibers can be achieved, and the bead structure ZIF67 / aramid nanofibers are prepared. The materialis compounded with a Nafion solution to be used as a proton exchange membrane of a fuel cell, so that the MOFs composite nano electrospun fiber / polymer matrix interface structure is optimized, the transfer channel structure is improved, and the physical and chemical microenvironment of the composite membrane is regulated and controlled; the high-performance composite proton exchange membrane withsynchronously improved proton transfer performance, alcohol resistance and mechanical performance is synergistically constructed.

Description

technical field [0001] The invention relates to the technical field of electrospinning nanofibers, MOFs and proton exchange membranes, in particular to a method for preparing a MOF / nanofiber modified Nafion proton exchange membrane with a string structure. Background technique [0002] With the continuous development of the global economy, the continuous expansion of the population base and the continuous and rapid growth of energy demand, the energy crisis and environmental pollution are the bottlenecks restricting the survival and development of human society, and have become the biggest challenges to the sustainable development of society. In view of the seriousness of the above problems, it is imperative to optimize the energy structure, change the energy utilization technology, and realize the "open source" and "reduction" of energy. As a high-quality new energy technology that integrates the functions of "open source" and "throttling", fuel cells have received extensiv...

Claims

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Application Information

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IPC IPC(8): H01M8/1069H01M8/1081
CPCH01M8/1069H01M8/1081Y02E60/50
Inventor 程博闻王蒙康卫民王利媛邓南平
Owner TIANJIN POLYTECHNIC UNIV
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