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Composite anion exchange membrane for fuel cell and preparation method thereof

An anion exchange membrane and base membrane technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of complex raw materials, large conduction resistance, low electrical conductivity, etc., and achieve high quaternization degree, low preparation cost, and electrical conductivity. high rate effect

Inactive Publication Date: 2011-06-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem faced by the traditional anion membrane is that the conductivity is low, which is mainly due to the large hydration radius of the conducted hydroxide ion, and the large conduction resistance through the membrane; the low conductivity leads to the output power of the battery mostly in the tens of mW / cm 2 The second is that the mechanical properties and stability of the membrane are low, and the quaternary ammonium group is easy to degrade (T.Sata et al., J.MembraneSci., 1996,112,161) under higher temperature and alkaline conditions, resulting in membrane loss of ion conduction
The highest ion exchange capacity of the anion membrane prepared by this technology is 1.66mmol / g, and the conductivity and fuel cell performance of the membrane have not been reported; in addition, the raw materials used are complicated and the cost is high, and the brushing of the mixed slurry on the reinforced mesh cannot guarantee uniformity

Method used

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  • Composite anion exchange membrane for fuel cell and preparation method thereof
  • Composite anion exchange membrane for fuel cell and preparation method thereof
  • Composite anion exchange membrane for fuel cell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024]Mix chloromethylstyrene (VBC), divinylbenzene (DVB) and benzoyl peroxide (BPO), the molar percentage is VBC:DVB:BPO=97.8:1.2:1; the cut size is 6.5cm×7cm The PTFE porous membrane was placed in a 0.5M potassium hydroxide ethanol solution for 2 hours, taken out, rinsed with ethanol and dried naturally in the air; the pretreated PTFE membrane was placed in the monomer / initiator prepared above Immerse in the mixed solution of solvent for 60 hours. After taking it out, absorb the monomer solution on the surface with filter paper, spread it between two glass plates with a thickness of 7mm, and seal the gap between the glass plates with adhesive tape; the three-layer structure Put it on a heating plate, apply external pressure with a heavy object, and then heat it at 110°C for 3 hours; the obtained composite film is peeled off from the surface of the glass plate, and then soaked in an aqueous solution of trimethylamine with a mass fraction of 33% for 40 hours. After taking it ou...

Embodiment 2

[0030] Mix chloromethylstyrene (VBC), divinylbenzene (DVB) and benzoyl peroxide (BPO), the molar percentage is VBC:DVB:BPO=97.8:1.2:1; the cut size is 6.5cm×7cm The PTFE porous membrane was placed in a 0.5M potassium hydroxide ethanol solution for 2 hours, taken out, rinsed with ethanol and dried naturally in the air; the pretreated PTFE membrane was placed in the monomer / initiator prepared above Immerse in the mixed solution of solvent for 60 hours. After taking it out, absorb the monomer solution on the surface with filter paper, spread it between two glass plates with a thickness of 7mm, and seal the gap between the glass plates with adhesive tape; the three-layer structure Put it on a heating plate, apply external pressure with a heavy object, and then heat it at 110°C for 4 hours; the obtained composite film is peeled off from the surface of the glass plate, and then immersed in an aqueous solution of trimethylamine with a mass fraction of 33% for 48 hours, taken out and u...

Embodiment 3

[0033] Mix chloromethylstyrene (VBC), divinylbenzene (DVB) and benzoyl peroxide (BPO), the molar percentage is VBC:DVB:BPO=97.8:1.2:1; the cut size is 6.5cm×7cm The PTFE porous membrane was placed in a 0.5M potassium hydroxide ethanol solution for 2 hours, taken out, rinsed with ethanol and dried naturally in the air; the pretreated PTFE membrane was placed in the monomer / initiator prepared above Immerse in the mixed solution of solvent for 60 hours. After taking it out, absorb the monomer solution on the surface with filter paper, spread it between two glass plates with a thickness of 7mm, and seal the gap between the glass plates with adhesive tape; the three-layer structure Put it on a heating plate, apply external pressure with a heavy object, and then heat it at 110°C for 4 hours; the composite film obtained is peeled off from the surface of the glass plate, and then it is washed with an aqueous solution of trimethylamine and tetramethylethylenediamine with a mass fraction...

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Abstract

The invention relates to preparation of fuel cell key materials, in particular to a composite anion exchange membrane for a fuel cell and a preparation method thereof. The method comprises the following steps: pretreating a porous polymer base membrane; reasonably matching chloromethylated radical polymerizing monomer, a cross linking agent and an initiator to prepare monomer solution; saturatingthe pretreated base membrane in the monomer solution; thermally polymerizing the monomer inside the base membrane in-situ, and promoting compounding of a polymer and the base membrane under the action of external pressure; and performing quaternization and alkali treatment to prepare the anion exchange membrane. The composite anion exchange membrane for the fuel cell and the preparation method thereof are concise and efficient, and save raw materials; and the prepared anion exchange membrane has high conductivity and strong stability, and is suitable for application in the field of alkaline fuel cells.

Description

technical field [0001] The invention relates to the field of fuel cell key materials. Specifically, it is a high-performance, low-cost, and simple-process composite anion-exchange membrane for fuel cells and a preparation method thereof. Background technique [0002] The rapid development of the global economy has greatly increased the demand for energy. However, fossil resources such as oil, natural gas, and coal have limited reserves on the earth, and they are not inexhaustible. Not only that, the use of fossil fuels emits a lot of CO 2 , NxO, hydrocarbons, sulfides and other pollutants, leading to environmental pollution problems such as greenhouse effect, acid rain, and ozone layer destruction. Human beings are facing increasingly serious energy and environmental crises. Therefore, the development of new clean energy has attracted great attention from governments and business circles all over the world. Proton Exchange Membrane Fuel Cell (PEMFC) is a new generation o...

Claims

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Application Information

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IPC IPC(8): H01M4/94H01M4/88C08J7/12C08J7/06
CPCY02E60/50
Inventor 张凤祥张华民曲超邱艳玲任俊霞
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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