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A kind of preparation method of proton exchange membrane with chemical stability

A technology of proton exchange membrane and chemical stability, which is applied in the field of proton conductive polymer material preparation, can solve the problems of low durability of proton exchange membrane, and achieve the effects of mild treatment conditions, high chemical stability and wide range of raw materials

Active Publication Date: 2022-04-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention focuses on solving the technical problem of low durability of proton exchange membranes in the actual use of fuel cells, and provides a method for preparing a chemically stable proton exchange membrane, which coordinates ferricyanide with strong negative charge density The introduction of groups into the proton exchange membrane can continuously consume the free radicals OH and OOH in the system during the operation of the proton exchange membrane fuel cell, and obtain a proton exchange membrane with high chemical stability

Method used

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  • A kind of preparation method of proton exchange membrane with chemical stability
  • A kind of preparation method of proton exchange membrane with chemical stability
  • A kind of preparation method of proton exchange membrane with chemical stability

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) evaporate the solvent of commercialization NafionD521 dispersion liquid, obtain Nafion212 solute;

[0027] (2) Physically mix Nafion212 solute and potassium ferrocyanide in a ratio of 95:5 in parts by mass to form a film-making formula;

[0028] (3) Dissolving the film-making formula in dimethylformamide to make a film-making solution with a total concentration of solute of 100g / L, fully dissolving and standing for defoaming;

[0029] (4) Pour the film-making solution into a petri dish, and evaporate the solution at 80°C for 20 hours under the condition of an air pressure of 1 atm to form a film;

[0030] (5) After the membrane forming process, the membrane was removed from the culture dish, soaked in 1mol / L dilute sulfuric acid in an ice bath environment for acidification, and a proton exchange membrane with high chemical stability could be obtained.

[0031] figure 1 The open circuit of the proton exchange membrane (Nafion212-Redox) prepared by the physical mixt...

Embodiment 2

[0033] (1) Dissolve 10.0 g of polyether ether ketone in 300 ml of concentrated sulfuric acid, react at room temperature for 60 hours, pour the product solution into ice water, wash the precipitate with ultrapure water to pH = 7, and then dry it at room temperature for 12 hours to obtain sulfonate Sulfonated polyether ether ketone with a degree of sulfonation of 70%;

[0034] (2) Physically mixing sulfonated polyetheretherketone and potassium ferricyanide in a ratio of 90:10 by mass to form a film-making formula;

[0035] (3) Dissolving the film-making formula in dimethylacetamide to make a film-making solution with a total concentration of solute of 50g / L, fully dissolving and standing for defoaming;

[0036] (4) Pour the film-making solution into a petri dish, and evaporate the solution at 120° C. for 12 hours under the condition of an air pressure of 1 atm to form a film;

[0037] (5) After the membrane forming process, the membrane was removed from the culture dish, soaked...

Embodiment 3

[0040] (1) Dissolve 5.0 g of polysulfone in 200 ml of concentrated sulfuric acid, react at room temperature for 30 hours, pour the product solution into ice water, wash the precipitate with ultrapure water to pH = 7, and then dry at room temperature for 12 hours to obtain the degree of sulfonation 45% sulfonated polysulfone;

[0041] (2) physically mixing sulfonated polysulfone and ferric pentacyanamide sodium salt in a ratio of 99:1 by mass to form a film-making formula;

[0042] (3) Dissolving the film-making formula in nitrogen-methylpyrrolidone to prepare a film-making solution with a total solute concentration of 500g / L, fully dissolving and standing for defoaming;

[0043](4) Pour the film-making solution into a petri dish, and evaporate the solution at 20°C for 48 hours under the condition of an air pressure of 1 atm to form a film;

[0044] (5) After the membrane forming process, the membrane was removed from the culture dish, soaked in 1mol / L dilute sulfuric acid in ...

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Abstract

The invention belongs to the technical field of proton conductive polymer material preparation and discloses a preparation method of a chemically stable proton exchange membrane. First prepare the polymer matrix material; then physically mix the polymer matrix material with the material containing the ferricyanide coordination group, and use it together as a film formula, or make the polymer matrix material and the material containing the ferricyanide coordination group produce iron The ligand substitution reaction of the cyanide coordination group becomes a whole, which is used as a membrane formula alone; then the membrane formula material is dissolved in a solvent to make a film-making solution, and after fully dissolved, it is left to defoam; then the film-making solution is poured into the culture Under certain temperature and time conditions, the film is formed by solvent evaporation; after the film forming process is completed, the proton exchange membrane can be obtained by acidifying the film in an ice bath. The invention introduces ferricyanide coordination groups into the membrane formula material, can continuously consume the free radicals generated in the system during the operation of the fuel cell, and prepares the proton exchange membrane with high chemical stability.

Description

technical field [0001] The invention belongs to the technical field of proton conductive polymer material preparation, and in particular relates to a preparation method of a proton exchange membrane. [0002] technical background [0003] As the core component of the proton exchange membrane fuel cell, the proton exchange membrane is responsible for conducting protons and isolating electrons while separating the cathode and anode of the battery, which has a decisive impact on the overall performance of the proton exchange membrane fuel cell. At present, the conductivity of some commercialized proton exchange membranes, such as Nafion series products, can already meet the basic requirements for use in proton exchange membrane fuel cells. However, in the actual operation of the proton exchange membrane fuel cell, the proton exchange membrane is in a complex system intertwined with water collection, heat, electricity and chemical reactions, and is extremely prone to mechanical, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22C08J7/14C08L27/18C08K3/28H01M8/1039H01M8/1069
CPCC08J5/2237C08J7/14H01M8/1039H01M8/1069C08J2327/18C08K3/28Y02P70/50Y02E60/50C08J5/2231C08J5/2256C08J2325/18C08J2381/06H01M2008/1095H01M8/1072H01M8/1051H01M8/1025H01M8/1027H01M8/1032H01M8/1034H01M8/1081C08J5/225C08J5/2287C08J5/2293C08J2323/36C08J2371/08H01M8/1023
Inventor 尹燕张俊锋刘鑫迈克尔·多米尼克·盖费
Owner TIANJIN UNIV