A kind of preparation method of sulfonated microporous polymer with high temperature resistance and high gas permeability for fuel cell and platinum-carbon composite membrane

A microporous polymer and fuel cell technology, applied in electrical components, battery electrodes, circuits, etc., to achieve the effects of easy scale-up production, high conductivity, and simple synthesis process

Active Publication Date: 2022-04-29
JIANGSU BINGCHENG HYDROGEN ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no literature report on the preparation method of sulfonated microporous polymer and its platinum-carbon composite membrane.

Method used

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  • A kind of preparation method of sulfonated microporous polymer with high temperature resistance and high gas permeability for fuel cell and platinum-carbon composite membrane
  • A kind of preparation method of sulfonated microporous polymer with high temperature resistance and high gas permeability for fuel cell and platinum-carbon composite membrane
  • A kind of preparation method of sulfonated microporous polymer with high temperature resistance and high gas permeability for fuel cell and platinum-carbon composite membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Preparation of sulfonated self-porous polymers. A four-neck flask equipped with a stirrer, a thermometer and an adapter was placed in a constant temperature oil bath. In a nitrogen atmosphere, the anhydrous K 2 CO 3 (120mmol, 16.5852g), tetrahydroxy monomer A1 (60mmol, 20.4252g), tetrafluoromonomer B1 (60mmol, 18.6114g) and anhydrous DMF (390mL) were added in a four-necked flask, first stirred at room temperature for 1 hours, and then reacted at 80°C for 2 hours. After the reaction, cool to room temperature, add distilled water, filter to obtain a filter cake, wash the filter cake with methanol and distilled water successively, and vacuum-dry to constant weight to obtain sulfonated microporous polymer powder.

[0032] (2) Preparation of sulfonated self-porous polymer mixture. The dried polymer powder was dissolved in NMP to form a polymer solution with a solid content of 8 wt.%. Then use a 0.45 μm filter membrane to filter, that is, the sulfonated self-micropor...

Embodiment 2

[0035] (1) Preparation of sulfonated self-porous polymers. A four-necked flask equipped with a stirrer, a thermometer and an adapter was placed in a constant temperature oil bath. In a nitrogen atmosphere, the anhydrous K 2CO 3 (120mmol, 16.5852g), tetrahydroxy monomer A2 (60mmol, 17.9004g) and tetrafluoromonomer B2 (60mmol, 21.615g) and anhydrous DMF (405mL) were added in the four-necked flask, first stirred at room temperature for 2 hours, and then reacted at 100°C for 5 hours. After the reaction, cool to room temperature, add distilled water, filter to obtain a filter cake, wash the filter cake with methanol and distilled water successively, and vacuum-dry to constant weight to obtain sulfonated microporous polymer powder.

[0036] (2) Preparation of sulfonated self-porous polymer mixture. The dried polymer powder was dissolved in DMF to form a polymer solution with a solid content of 9 wt.%. Then use a 0.45 μm filter membrane to filter, that is, the sulfonated self-mi...

Embodiment 3

[0039] (1) Preparation of sulfonated self-porous polymers. A four-necked flask equipped with a stirrer, a thermometer and an adapter was placed in a constant temperature oil bath. In a nitrogen atmosphere, the anhydrous K 2 CO 3 (120mmol, 16.5852g), tetrahydroxy monomer A3 (60mmol, 22.9452g), tetrafluoromonomer B3 (60mmol, 21.615g) and anhydrous DMF (446mL) were added in the four-necked flask, first stirred at room temperature for 1 hours, and then reacted at 150°C for 12 hours. After the reaction, cool to room temperature, add distilled water, filter to obtain a filter cake, wash the filter cake with methanol and distilled water successively, and vacuum-dry to constant weight to obtain sulfonated microporous polymer powder.

[0040] (2) Preparation of sulfonated self-porous polymer mixture. The dried polymer powder was dissolved in tetrahydrofuran to prepare a polymer solution with a solid content of 6 wt.%. Then use a 0.45 μm filter membrane to filter, that is, the sulf...

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Abstract

The invention discloses a preparation method of a high-temperature-resistant high-gas-permeability sulfonated microporous polymer and a platinum-carbon composite membrane for a fuel cell. Under an inert gas atmosphere, the tetrahydroxy monomer A, the sulfonated tetrafluoro monomer B and potassium carbonate are dissolved in a polar organic solvent C, and heated and polycondensed to form the sulfonated microporous polymer I. Dissolve I in an aprotic polar solvent D to form a polymer mixture E with a solid content of 5-20%, add platinum carbon to form a dispersion G, and the mass ratio of the platinum-carbon catalyst to I is 1-5:100 . Coat G evenly on flat glass, dry it in an inert atmosphere oven or a vacuum oven according to a certain heat treatment procedure, peel off the film after drying, and obtain a sulfonated microporous polymer platinum with a thickness of 10-50 microns Carbon Composite Membranes II. In the present invention, the sulfonated microporous polymer I has the characteristics of high temperature resistance and high air permeability; the composite membrane II has high mechanical strength, high electrical conductivity and high air permeability.

Description

technical field [0001] The invention relates to the field of preparation of fuel cell membrane electrodes, in particular to a preparation method of a fuel cell high-temperature-resistant and highly gas-permeable sulfonated microporous polymer and a platinum-carbon composite membrane thereof. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy in fuel and oxidant into electrical energy with high efficiency (50-70%) and environmental friendliness through electrochemical reaction without combustion. Proton exchange membrane fuel cell (PEMFC) has become the fastest growing technology in recent years due to its high energy conversion rate, high power density, environmental friendliness, quick startup at room temperature, no electrolyte loss, easy water discharge, and long life. A type of fuel cell. [0003] The core component of PEMFC is the membrane electrode (MEA), which is generally composed of proton exchange membrane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/40H01M4/86H01M4/88
CPCC08G65/4056C08G65/4093H01M4/8875H01M4/8668Y02E60/50
Inventor 庄永兵朱浩朱艾成张大杰万印华
Owner JIANGSU BINGCHENG HYDROGEN ENERGY TECH CO LTD
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