Preparation process of composite membrane for fuel cell

A preparation process and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of composite membrane penetration and leakage, battery performance degradation, and low proton conductivity, so as to increase hydrophilicity and improve performance , smooth surface effect

Active Publication Date: 2021-04-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of preparing the composite membrane in the existing technology, on the one hand, the resin liquid is unevenly distributed in the pores of the microporous membrane, and some micropores cannot be immersed in the resin, and a layer of resin film is formed on the surface of the microporous membrane, resulting in the composite membrane. During the operation of the battery, phenomena such as gas penetration and hydrogen permeation occur; on the other hand, the composite membrane prepared b

Method used

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  • Preparation process of composite membrane for fuel cell
  • Preparation process of composite membrane for fuel cell

Examples

Experimental program
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Example Embodiment

[0045]Example 1

[0046]A, base film pretreatment: an expansion-piratoethylene microporous membrane having a pore size of 1 μm, a porosity of 1 μm, and a thickness of 1 μm to 3% by weight of H.2O2In the solution, it was cooked at 60 ° C for 20 min, followed by a large amount of deionized water, the flushing mode was taken after the base film was completely immersed in the deionized water 5S, repeated soaking - taken out the step 5 times, no h2O2After the residue, the base film was soaked in the isopropyl alcohol solvent for 30 min, and the drying 2h was taken out, and then placed in a closed space filled with oxygen, 10 min was irradiated with an ultraviolet lamp having a wavelength of 185 nm.

[0047]B. Solution configuration: Nafion solution (perfluorosulfonic acid resin liquid) with a concentration of 5 wt%, diluted with isopropanol solvent to 0.1% by weight of concentration as a low concentration of perfluorosulfonic acid resin, and add a resin solid content 5 wt % SIO2And resin solid...

Example Embodiment

[0053]Example 2

[0054]a, base film pretreatment: Put the pore diameter of 10 μm, a porosity of 80%, thickness of 15 μm, and placed in 3% by weight of H2O2In the solution, it was cooked at 60 ° C for 20 min, followed by a large amount of deionized water, and the flushing mode was taken after the base film was completely immersed in the deionized water. After removing, repeated soaked - taken out 7 times, no h2O2After the residue, the base film was soaked in the isopropyl alcohol solvent for 30 min, and the drying 2h was removed, and then placed in a closed space filled with oxygen, 15 min was irradiated with an ultraviolet lamp having a wavelength of 185 nm.

[0055]B. Solution configuration: Nafion solution with a concentration of 5 wt%, diluted with isopropanol solvent to 0.5 wt% concentration as a low concentration of perfluorosulfonic acid resin, and add a resin content of 2% by weight TiO2And the resin content of 2% by weight of MnO particles, thoroughly stirred well, poured it into...

Example Embodiment

[0061]Example 3

[0062]A, base film pretreatment: pore diameter of 20 μm, porosity of 65%, thickness of 30 μm, is placed in 3% by weight of H2O2In the solution, cooked at 60 ° C for 20 min, after which a large amount of deionized water was rinsed, the flushing mode was taken after the base film was completely immersed in the deionized water 8S, repeated soaking - taken out step 8 times, no h2O2After the residue, the base membrane was soaked in the isopropyl alcohol solvent for 30 min, and the drying 2h was removed, and then placed in a closed space filled with oxygen, and the wavelength was irradiated with a wavelength of 185 nm for 10 min, spare.

[0063]b, solution configuration: Nafion solution having a concentration of 5 wt%, diluted with isopropanol solvent to 1 wt% concentration as a low concentration of perfluorosulfonic acid resin liquid, 3 wt% Al2O3And resin content 3 wt% Zro2, Stir well and pour it into the treatment pool.

[0064]The Nafion solution having a concentration of 10 w...

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Abstract

The invention discloses a preparation process of a composite membrane for a fuel cell, the composite membrane takes an expansion body polytetrafluoroethylene microporous base membrane as a skeleton, and is subjected to dipping treatment of mixed liquids with different concentrations from low to high, specifically, a treatment tank I is loaded with mixed liquid of perfluorosulfonic acid resin liquid with the concentration of 0.1 wt%-1wt%, a water-retaining agent and a free radical quenching agent; a mixed solution of perfluorosulfonic acid resin liquid with the concentration of 2wt%-6wt%, a water-retaining agent and a free radical quenching agent is contained in a treatment tank II; and a mixed solution of perfluorosulfonic acid resin liquid with the concentration of 7wt%-20wt% and sulfonated polyetheretherketone is contained in a treatment tank III. The proton exchange composite membrane prepared by the process provided by the invention does not generate pore residues, avoids hydrogenpermeation in the use process, and can meet the requirements of mechanical strength, dimensional stability and excellent electrochemical performance at the same time.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a preparation process of a composite membrane for fuel cells. Background technique [0002] Proton exchange membrane fuel cells (PEMFC) have the advantages of high power density, high energy conversion efficiency, low temperature start-up, and environmental friendliness, and are widely used in aerospace, energy, transportation, and military fields. Proton exchange membrane (PEM) is one of the core components of the battery, which is the substrate of the electrolyte (proton transfer) and electrode active material (catalyst); in addition, PEM is also a dense selective permeable membrane, which is different from the usual porous film. An ideal PEM has high proton conductivity, low gas permeability, high mechanical strength, thermal and chemical stability, and suitable cost performance. [0003] The currently used perfluorosulfonic acid proton exchange membrane has good proton c...

Claims

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Application Information

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IPC IPC(8): H01M8/1023H01M8/1086H01M8/1088
CPCH01M8/1088H01M8/1023H01M8/1086Y02E60/50
Inventor 郝金凯张洪杰邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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