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Proton exchange membrane and preparation method thereof

A technology for proton exchange membranes and membrane components, which is applied in the manufacture of final products, sustainable manufacturing/processing, solid electrolyte fuel cells, etc., and can solve the problems of inability to obtain continuous and uniform membranes, poor mechanical properties, and no practical value.

Active Publication Date: 2015-04-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a low-concentration solution cannot obtain a continuous and uniform film, and the mechanical properties of the film are very poor and have no practical value
Another method, even if the PBO film is obtained, it is difficult to dope the film to obtain the doped PBO, because the PBO macromolecular chains are tightly aggregated, and it is difficult for the doping acid to enter the molecular chains.

Method used

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  • Proton exchange membrane and preparation method thereof
  • Proton exchange membrane and preparation method thereof
  • Proton exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Preparation of mixed poly(p-phenylenebenzobisoxazole) and polyphosphoric acid (PBO / PPA) slurry

[0056] Add 114.90g of 4,6-diaminoresorcinol hydrochloride (DAR), 917.8g of P 2 o 5 Polyphosphoric acid (PPA) with a concentration of 80wt%, 89.55g of terephthalic acid (PTA) with a particle size of 5 microns and 316.50g of P 2 o 5 , Seal the reaction kettle, start the agitator, the stirring direction is the same as the helical direction of the bolt belt, and the rotation speed is 80rpm.

[0057] Raise the temperature of the reaction materials in the reaction kettle to 40°C and keep for 1 hour to make the materials mix initially, then slowly raise the temperature to 65°C and keep for 1 hour. Feed dry high-purity nitrogen gas into the reactor, so that the pressure in the reactor reaches 0.5 MPa, and at the same time raise the temperature to 110°C, keep it for 15 hours, open the pressure relief valve, and remove the pressure from the reactor.

[0058] Then heat up the r...

Embodiment 2

[0068] 1) Preparation of mixed poly(p-phenylenebenzobisoxazole) and polyphosphoric acid (PBO / PPA) slurry

[0069] Add 114.9g of 4,6-diaminoresorcinol hydrochloride (DAR), 920.3g of P 2 o 5 Polyphosphoric acid (PPA) at a concentration of 80 wt%, 152.6g of 2,5-dihydroxyterephthalic acid with a particle size of 5 microns and 326.40g of P 2 o 5 , Seal the reaction kettle, start the agitator, the stirring direction is the same as the helical direction of the bolt belt, and the rotation speed is 80rpm.

[0070]Raise the temperature of the reaction materials in the reactor to 50°C and keep for 1 hour to make the materials mix initially, then slowly raise the temperature to 70°C and keep for 1 hour. Feed dry high-purity nitrogen into the reactor to make the pressure in the reactor reach 1.5MPa, and at the same time raise the temperature to 120°C, keep it for 6 hours, open the pressure relief valve, and remove the pressure from the reactor.

[0071] Then heat up the reaction materi...

Embodiment 3

[0082] (1) Preparation of mixed poly(p-phenylenebenzobisoxazole) and polyphosphoric acid (PBO / PPA) slurry

[0083] Add 114.90g of 4,6-diaminoresorcinol hydrochloride (DAR), 919.3g of P 2 o 5 Polyphosphoric acid (PPA) with a concentration of 80wt%, 109.43g terephthaloyl chloride with a particle size of 5 microns and 321.50gP 2 o 5 , Seal the reaction kettle, start the agitator, the stirring direction is the same as the helical direction of the bolt belt, and the rotation speed is 90rpm.

[0084] Raise the temperature of the reaction materials in the reaction kettle to 45°C and keep for 1 hour to make the materials mix initially, then slowly raise the temperature to 60°C and keep for 1 hour. Feed dry high-purity nitrogen into the reactor to make the pressure in the reactor reach 1.2MPa, and at the same time raise the temperature to 120°C, keep it for 15 hours, open the pressure relief valve, and remove the pressure from the reactor.

[0085] Then the reaction mass was heated...

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Abstract

The invention relates to a proton exchange membrane and preparation method thereof, and the proton exchange membrane is a Poly-p-phenylene ben-zobisthiazole and polyphosphoric acid blend membrane (PBO / PPA), and the method for preparing the Poly-p-phenylene ben-zobisthiazole and polyphosphoric acid blend membrane (PBO / PPA) as a proton exchange membrane comprises: (1) polymerizing and obtaining a PBO / PPA slurry; (2) preparing the PBO / PPA slurry into a PBO / PPA proton exchange membrane; (3) controlling the thickness of the membrane by controlling the concentration of the polymer solution and the compacting temperature and pressure; (4) carrying out a proton conductivity test directly after the membrane is taken out and the membrane is used as a proton exchange membrane is assembled in the H2 / O2 fuel monocell for investigating power generation performance. The invention selects an appropriate film forming technology according to the characteristic of the PBO rigid molecular chain, and has the advantages of simple preparation technology and easy control, and the obtained proton exchange membrane has a higher proton conductivity under high temperature with excellent power generation property.

Description

technical field [0001] The invention relates to a proton exchange membrane and a preparation method thereof, and provides a poly(p-phenylenebenzobisoxazole) proton exchange membrane which is suitable for high-temperature hydrogen-oxygen fuel cells and has good proton conductivity, film-forming performance and mechanical properties The invention relates to a method for preparing the same, in particular to a method in which poly-p-phenylenebenzobisoxazole (PBO) and polyphosphoric acid (PPA) blend membrane (PBO / PPA) is used as a proton exchange membrane, and the blend membrane is used in a fuel cell application in Background technique [0002] The fuel cell is a new type of energy conversion device, which directly converts the chemical energy stored in the fuel into electrical energy through an electrochemical reaction, that is, through the fuel (such as H 2 , Methanol) electrochemical oxidation and oxidant (such as O 2 ) electrochemical reduction directly generates an electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/10
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 李光蔡荷菲金俊弘杨胜林江建明
Owner DONGHUA UNIV
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