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Fuel cell membrane with high tolerance and its preparation method

A fuel cell membrane and tolerance technology, used in fuel cells, fuel cell parts, battery pack parts, etc., can solve the problem of the decrease in the activity of oxygen-containing hydroxyl radicals, the inability to play a protective role, and the acceleration of peroxidation. Hydrogen deterioration and other problems, to achieve the effect of increased tolerance

Active Publication Date: 2012-06-27
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This phenomenon causes an inevitable increase in the local concentration of metal elements leading to accelerated degradation of hydrogen peroxide and deterioration of the membrane.
3) The added phenols, quinones, hindered amines and other substances are mostly used as polymerization inhibitors in free radical polymerization, that is to say, they have very good reactivity to carbon free radicals, but for oxygen-containing hydroxyl free base activity will be greatly reduced
Furthermore, when they scavenge free radicals, they themselves continue to degrade and eventually disappear, unable to play a protective role.

Method used

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  • Fuel cell membrane with high tolerance and its preparation method
  • Fuel cell membrane with high tolerance and its preparation method
  • Fuel cell membrane with high tolerance and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The exchange capacity obtained by formula (III) and tetrafluoroethylene copolymer hydrolytic acidification is that the perfluorosulfonic acid resin of 1.50mmol / g is dissolved in DMF and forms the dispersion liquid of 25wt%, in this dispersion liquid, add the equivalent to resin weight 8 % of formula (VI) and Ce 3+ The formed complex contains oxygen free radicals to degrade additives, and then disperses evenly, and heats after pouring to volatilize the solvent to obtain a 30-micron-thick high-endurance fuel cell membrane. R in formula (VI) 1 for:

[0051]

[0052] R 2 = H; R 3 =CH 3 .

Embodiment 2

[0054] The perfluorosulfonic acid resin with exchange capacity of 1.25mmol / g obtained by copolymerizing formula (I) with (IV) and tetrafluoroethylene and hydrolytic acidification is dissolved in DMSO to form a 30wt% dispersion liquid. In above-mentioned dispersion liquid, add the formula (E) material that is equivalent to resin weight 15% (the steric hindrance of boronic acid group is in quinoline ring 5) and Mn 2+ The complex oxygen-containing free radical degrading additive that forms; Disperse evenly, the polytetrafluoroethylene microporous membrane (aperture 1 micron) of porosity 95% is immersed in the above-mentioned dispersion liquid, treat the microporous polytetrafluoroethylene membrane After the pores are completely filled, take it out and heat it to volatilize the solvent, and obtain a 20-micron-thick microporous-enhanced high-endurance fuel cell membrane.

Embodiment 3

[0056] The exchange capacity obtained by formula (VI) and tetrafluoroethylene copolymerization and acidification hydrolysis is dissolved in propanol-water (propanol: water=1:2 mass ratio) to form 15wt% perfluorophosphoric acid resin Dispersions. Add formula (VII) and La which are equivalent to 3% of resin weight in the above-mentioned dispersion liquid 3+ Formed complex oxygen free radical degradation additive, in formula (VII), R 5 Yes: R 4 Yes: Then disperse evenly, and heat to volatilize the solvent after pouring to obtain a 15 micron thick high-endurance fuel cell membrane.

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Abstract

The invention provides a fuel cell membrane with a high tolerance and its preparation method. The fuel cell membrane is formed by perfluoro ion resin, and an oxygen-containing free radical degradation agent is added into the membrane. The fuel cell membrane in the invention also contains polytetrafluoroethylene microporous membrane reinforcing material. The fuel cell membrane provided in the invention has a strong free radical tolerance, so that a high performance membrane is provided for long-life fuel cells. The invention also discloses the preparation method of the fuel cell membrane.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and in particular relates to a fuel cell membrane with high tolerance and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell is a power generation device that directly converts chemical energy into electrical energy by electrochemical means, and is considered to be the preferred clean and efficient power generation technology in the 21st century. Proton exchange membrane (proton exchange membrane, PEM) is the key material of proton exchange membrane fuel cell (proton exchange membrane fuel cell, PEMFC). [0003] In the fuel cell, the fuel cell membrane plays a key role in transporting the reaction gases between the cathode and anode and carrying the catalyst. When the fuel cell is working, there will always be a small amount of oxygen passing through the membrane from the cathode to the anode through osmosis, and the oxygen reachin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16C08L29/10C08L27/18C08L43/02C08K5/3432C08K5/3437C08J5/18H01M8/0202H01M8/1018H01M8/1046H01M8/1069
CPCY02E60/12Y02E60/50
Inventor 唐军柯张永明张恒庞桂花申玉鹏
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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