Molecular cage modified fuel battery proton exchange membrane and preparation method thereof

Abstract

The invention provides a molecular cage modified fuel battery proton exchange membrane and a preparation method thereof. Benzenetricarboxaldehyde and hydrated heteropoly acid are added into an ethyl acetate solvent; after stirring treatment, an ethylenediamine solution is added; an organic molecular cage coated heteropoly acid particle colloid material is obtained through heat treatment; then, mixing and ball milling are performed on the organic molecular cage coated heteropoly acid particle colloid material and solid nafion resin powder in an organic solvent; casting film forming is performedto obtain the molecular cage modified fuel battery proton exchange membrane. The method has the advantages that an organic molecular cage coat the heteropoly acid particles; the escape of the heteropoly acid particles from the molecular cage is effectively controlled; water molecules can freely flow inside the molecular cage; the dissolution loss of heteropoly acid is effectively avoided; the stability of the heteropoly acid compounds is improved; meanwhile, the whole protolysis rate of the film material cannot be reduced; meanwhile, in the preparation, the compounding conditions are simple,so that the technical flow process is simplified; the mass production of the proton exchange membrane can be promoted.

Description

technical field

[0001] The invention relates to the field of fuel cells, in particular to the preparation of proton exchange membranes, in particular to a molecular cage modified fuel cell proton exchange membrane and a preparation method. Background technique

[0002] Since the fuel cell began to use DuPont's nafion perfluorosulfonic acid proton exchange membrane in 1966, various technologies have gradually matured. The sulfonic acid ionomer represented by Nafion membrane has high ion selective permeability and is currently the most mature commercial proton exchange membrane. But there are still many shortcomings. One is that it is expensive, the sulfonation and fluorination process of raw materials is very complicated, and the preparation cost is extremely high; the other is that the use environment of the membrane material is relatively harsh, and it needs to work below 100°C and in a suitable humidity range. Once the temperature is too high Excessive moisture content w...

Examples

Embodiment 1

[0029] The preparation process is:

[0030] (1) Add trimesin to ethyl acetate solvent and let it stand for 5 minutes, then add hydrated heteropolyacid for ultrasonic stirring treatment, and then stand for 30 minutes, trimesaldehyde is adsorbed on the hydrated heteropolyacid due to the hydrophilic property of The surface of polyacid, then slowly add ethylenediamine solution dropwise and let it stand for 24 hours, and finally put the solution system in a vacuum furnace for heat treatment, so that trimesaldehyde and ethylenediamine form molecular cages on the surface of heteropolyacid particles for encapsulation After the solvent is completely volatilized, the colloidal material of the organic molecular cage coated heteropolyacid particles is obtained; the ultrasonic power density of the ultrasonic stirring treatment is 3W / cm 2 , the stirring speed is 140r / min, and the treatment time is 18min; the temperature of heat treatment is 260°C, and the time is 3h; the parts by weight of ...

Embodiment 2

[0036] The preparation process is:

[0037] (1) Add trimesin to ethyl acetate solvent and let it stand for 5 minutes, then add hydrated heteropolyacid for ultrasonic stirring treatment, and then stand for 30 minutes, trimesaldehyde is adsorbed on the hydrated heteropolyacid due to the hydrophilic property of The surface of polyacid, then slowly add ethylenediamine solution dropwise and let it stand for 24 hours, and finally put the solution system in a vacuum furnace for heat treatment, so that trimesaldehyde and ethylenediamine form molecular cages on the surface of heteropolyacid particles for encapsulation After the solvent is completely volatilized, the colloidal material of the organic molecular cage coated heteropolyacid particles is obtained; the ultrasonic power density of the ultrasonic stirring treatment is 2W / cm 2 , the stirring speed is 120r / min, and the treatment time is 30min; the heat treatment temperature is 200°C, and the time is 4h; the parts by weight of eac...

Embodiment 3

[0044] The preparation process is:

[0045] (1) Add trimesin to ethyl acetate solvent and let it stand for 5 minutes, then add hydrated heteropolyacid for ultrasonic stirring treatment, and then stand for 30 minutes, trimesaldehyde is adsorbed on the hydrated heteropolyacid due to the hydrophilic property of The surface of polyacid, then slowly add ethylenediamine solution dropwise and let it stand for 24 hours, and finally put the solution system in a vacuum furnace for heat treatment, so that trimesaldehyde and ethylenediamine form molecular cages on the surface of heteropolyacid particles for encapsulation After the solvent is completely volatilized, the colloidal material of the organic molecular cage coated heteropolyacid particles is obtained; the ultrasonic power density of the ultrasonic stirring treatment is 4W / cm 2 , the stirring speed is 180r / min, and the treatment time is 10min; the temperature of heat treatment is 300°C, and the time is 2h; the parts by weight of ...

technical field

[0001] The invention relates to the field of fuel cells, in particular to the preparation of proton exchange membranes, in particular to a molecular cage modified fuel cell proton exchange membrane and a preparation method. Background technique

[0002] Since the fuel cell began to use DuPont's nafion perfluorosulfonic acid proton exchange membrane in 1966, various technologies have gradually matured. The sulfonic acid ionomer represented by Nafion membrane has high ion selective permeability and is currently the most mature commercial proton exchange membrane. But there are still many shortcomings. One is that it is expensive, the sulfonation and fluorination process of raw materials is very complicated, and the preparation cost is extremely high; the other is that the use environment of the membrane material is relatively harsh, and it needs to work below 100°C and in a suitable humidity range. Once the temperature is too high Excessive moisture content w...

Examples

Embodiment 1

[0029] The preparation process is:

[0030] (1) Add trimesin to ethyl acetate solvent and let it stand for 5 minutes, then add hydrated heteropolyacid for ultrasonic stirring treatment, and then stand for 30 minutes, trimesaldehyde is adsorbed on the hydrated heteropolyacid due to the hydrophilic property of The surface of polyacid, then slowly add ethylenediamine solution dropwise and let it stand for 24 hours, and finally put the solution system in a vacuum furnace for heat treatment, so that trimesaldehyde and ethylenediamine form molecular cages on the surface of heteropolyacid particles for encapsulation After the solvent is completely volatilized, the colloidal material of the organic molecular cage coated heteropolyacid particles is obtained; the ultrasonic power density of the ultrasonic stirring treatment is 3W / cm 2 , the stirring speed is 140r / min, and the treatment time is 18min; the temperature of heat treatment is 260°C, and the time is 3h; the parts by weight of ...

Embodiment 2

[0036] The preparation process is:

[0037] (1) Add trimesin to ethyl acetate solvent and let it stand for 5 minutes, then add hydrated heteropolyacid for ultrasonic stirring treatment, and then stand for 30 minutes, trimesaldehyde is adsorbed on the hydrated heteropolyacid due to the hydrophilic property of The surface of polyacid, then slowly add ethylenediamine solution dropwise and let it stand for 24 hours, and finally put the solution system in a vacuum furnace for heat treatment, so that trimesaldehyde and ethylenediamine form molecular cages on the surface of heteropolyacid particles for encapsulation After the solvent is completely volatilized, the colloidal material of the organic molecular cage coated heteropolyacid particles is obtained; the ultrasonic power density of the ultrasonic stirring treatment is 2W / cm 2 , the stirring speed is 120r / min, and the treatment time is 30min; the heat treatment temperature is 200°C, and the time is 4h; the parts by weight of eac...

Embodiment 3

[0044] The preparation process is:

[0045] (1) Add trimesin to ethyl acetate solvent and let it stand for 5 minutes, then add hydrated heteropolyacid for ultrasonic stirring treatment, and then stand for 30 minutes, trimesaldehyde is adsorbed on the hydrated heteropolyacid due to the hydrophilic property of The surface of polyacid, then slowly add ethylenediamine solution dropwise and let it stand for 24 hours, and finally put the solution system in a vacuum furnace for heat treatment, so that trimesaldehyde and ethylenediamine form molecular cages on the surface of heteropolyacid particles for encapsulation After the solvent is completely volatilized, the colloidal material of the organic molecular cage coated heteropolyacid particles is obtained; the ultrasonic power density of the ultrasonic stirring treatment is 4W / cm 2 , the stirring speed is 180r / min, and the treatment time is 10min; the temperature of heat treatment is 300°C, and the time is 2h; the parts by weight of ...

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