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Preparation method of carbazole polyaromatic piperidine anion exchange membrane

An anion exchange membrane and polyaromatic piperidine technology, which is applied in the field of preparation of carbazole polyaromatic piperidine anion exchange membranes, can solve the problems of high conductivity, low electrical conductivity, poor mechanical stability and chemical stability of anion exchange membranes, and achieves the Low production cost, high mechanical strength, and excellent film-forming properties

Active Publication Date: 2021-12-28
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing anion-exchange membranes of carbazole polyaromatic piperidines for the shortcomings of current anion-exchange membranes, such as high electrical conductivity, low electrical conductivity, and poor mechanical and chemical stability.

Method used

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  • Preparation method of carbazole polyaromatic piperidine anion exchange membrane
  • Preparation method of carbazole polyaromatic piperidine anion exchange membrane
  • Preparation method of carbazole polyaromatic piperidine anion exchange membrane

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Embodiment 1

[0030] A kind of preparation method of carbazole polyaromatic piperidine anion exchange membrane, its concrete method step comprises:

[0031] (1), under normal temperature conditions, first dissolve N-ethylcarbazole and p-terphenyl monomer in chloroform according to the molar ratio of 5:95 to form a homogeneous or heterogeneous solution; then, add dichloro Add N-methyl-4-piperidone monomer to the methane solution, stir to dissolve, the molar ratio of the sum of N-ethylcarbazole and p-terphenyl monomer to N-methyl-4-piperidone monomer 1:1, the concentration of all monomers in the solution is 10wt%;

[0032] (2), under the environment of -4 ℃, add trifluoroacetic acid and trifluoromethanesulfonic acid successively to the solution of step (1), wherein the volume of trifluoroacetic acid, trifluoromethanesulfonic acid and chloroform in the solution The ratio is 1:5:10, and then react at this temperature for 8 hours; after the reaction, pour the solution into 1M KOH solution to ob...

Embodiment 2

[0038] A kind of preparation method of carbazole polyaromatic piperidine anion exchange membrane, its concrete method step comprises:

[0039] (1), under normal temperature conditions, first N-ethylcarbazole and p-terphenyl monomer are dissolved in dichloromethane according to the molar ratio of 10:90 to form a homogeneous or heterogeneous solution; then, to Add N-methyl-4-piperidone monomer in the dichloromethane solution, stirring and dissolving, the sum of N-ethylcarbazole and p-terphenyl monomer and N-methyl-4-piperidone monomer The molar ratio is 1:1.05, and the concentration of all monomers in the solution is 20wt%;

[0040] (2), under the environment of 0 ℃, in the solution of step (1), add dropwise trifluoroacetic acid and trifluoromethanesulfonic acid successively, wherein trifluoroacetic acid, trifluoromethanesulfonic acid and dichloromethane in the solution The volume ratio is 1:8:10, and then react at this temperature for 12 hours; after the reaction, pour the sol...

Embodiment 3

[0048] A kind of preparation method of carbazole polyaromatic piperidine anion exchange membrane, its concrete method step comprises:

[0049] (1), under normal temperature conditions, first dissolve N-ethylcarbazole and p-terphenyl monomer in chloroform according to the molar ratio of 15:85 to form a homogeneous or heterogeneous solution; then, add dichloro Add N-methyl-4-piperidone monomer to the methane solution, stir to dissolve, the molar ratio of the sum of N-ethylcarbazole and p-terphenyl monomer to N-methyl-4-piperidone monomer 1:1.1, the concentration of all monomers in the solution is 25wt%;

[0050] (2), under the environment of 3 ℃, in the solution of step (1), add dropwise trifluoroacetic acid and trifluoromethanesulfonic acid successively, wherein the volume ratio of trifluoroacetic acid, trifluoromethanesulfonic acid and chloroform in the solution 1:8:8, then react at this temperature for 24h; after the reaction, pour the solution into 1M KOH solution to obtain...

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Abstract

The invention provides a preparation method of a carbazole polyaromatic piperidine anion exchange membrane, and belongs to the technical field of fuel cells. The carbazole aryl group is introduced into a polymer main chain of aromatic hydrocarbon and piperidone for the first time, and a benzene ring in the carbazole aryl group does not have an internal rotation function, so that the phenyl adsorption effect of a fuel cell catalyst can be effectively reduced, and the performance of a fuel cell is improved. The anion exchange membrane prepared by the invention not only has excellent mechanical stability, but also has excellent OH<-> conductivity (as high as 204.8 mS / cm@90 DEG C); after being soaked in a 1M KOH solution at 80 DEG C for 2100 hours, the conductivity loss is only 3%, and the alkaline resistance is extremely high; when the prepared anion exchange membrane is assembled on a fuel cell, the peak power density reaches up to 1.72 W / cm < 2 >, and meanwhile, the service life of 100 hours can be kept; and the method is simple and easy to implement and low in production cost, and the anion exchange membrane prepared by adopting the method can be applied to the fields of alkaline fuel cells, electrolyzed water, carbon dioxide catalytic reduction and the like.

Description

1. Technical field: [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a preparation method of a carbazole polyarene piperidine anion exchange membrane. 2. Background technology: [0002] In order to jointly deal with the problem of global warming, my country solemnly promises to the world the dual carbon goals of carbon peaking and carbon neutrality. One of the important ways to achieve this goal is to replace traditional fossil energy with greener and more environmentally friendly new energy, the most potential of which is fuel cell technology with high energy conversion efficiency and pollution-free. Proton exchange membrane fuel cells, which are currently in the early stages of commercialization, are facing cost challenges for large-scale applications. The fundamental reason is that they rely too much on expensive precious metal platinum catalysts. Unlike proton exchange membrane fuel cells, alkaline anion exchange membrane f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1072C08G61/12
CPCC08G61/124C08G61/122H01M8/1072C08G2261/122C08G2261/3221C08G2261/3241C08G2261/312C08G2261/72Y02E60/50Y02P70/50
Inventor 魏子栋王建川袁伟李莉
Owner CHONGQING UNIV
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