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Perfluorosulfonic composite proton exchange membrane for fuel cell

A proton exchange membrane and perfluorosulfonic acid technology, which is applied in fuel cells, fuel cell parts, battery pack parts, etc., can solve the problem of providing membrane dimensional stability and proton conductivity at the same time, and affecting the overall performance of composite membranes and other issues, to achieve good mechanical strength and proton conductivity, benefit performance, and improve the effect of heat treatment temperature

Inactive Publication Date: 2010-07-14
SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the glass transition temperature of polymer reinforced membrane materials such as polytetrafluoroethylene membranes will be higher than this range, which will inevitably affect the overall performance of the composite membrane due to the combination of polymer reinforced materials and perfluorosulfonic acid resin
[0007] Existing patent publications and documents only improve the performance of the proton exchange membrane on the one hand, and it is difficult to provide the dimensional stability and proton conductivity of the membrane at the same time

Method used

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  • Perfluorosulfonic composite proton exchange membrane for fuel cell
  • Perfluorosulfonic composite proton exchange membrane for fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0037]8g manganese nitrate is dissolved in 200 milliliters of ethanol-water mixed solution, wherein ethanol and water volume ratio are 1: 1, stirring and mixing make it form homogeneous solution, obtain the alcohol-water mixed solution of manganese nitrate; Get 10g perfluorosulfonic acid resin ( Chinafion, EW900), was dissolved in 200 milliliters of dimethyl sulfoxide, and prepared perfluorosulfonic acid resin solution; Adopted manganese nitrate ethanol water mixed solution to titrate the prepared perfluorosulfonic acid resin solution to a pH value of 7.5, obtained Manganese ion-type resin solution; a clean thickness of 20 microns porous polytetrafluoroethylene (PTFE) film (80% porosity) is placed in this manganese ion-type resin solution and soaked for 5 minutes, and then the excess resin on the surface of the wet film is easily removed, Place in a vacuum drying oven, adjust the temperature to 260°C, and heat-treat for 8 minutes; in order to completely block the internal pores...

Embodiment 2

[0041] Dissolve 8 g of manganese nitrate in 60 ml of ethanol-water mixed solution, wherein the volume ratio of ethanol and water is 1:1, stir and mix to form a uniform solution, and obtain the alcohol-water mixed solution of manganese nitrate; take a certain weight Shandong Dongyue Shenzhou Company The produced perfluorosulfonic acid resin (chinafion, EW900) is dissolved in N,N-dimethylacetamide to prepare a perfluorosulfonic acid resin solution with a mass percent concentration of 14.5%; the alcohol-water mixed solution of manganese nitrate is used The obtained perfluorosulfonic acid resin solution of titration is to pH value 7.5, obtains manganese ion type perfluorosulfonic acid resin ethanol aqueous solution; Clean thickness 18 micron porous polytetrafluoroethylene (PTFE) film (porosity 40% is placed in Immerse in this manganese ion-type perfluorosulfonic acid resin solution for 5 minutes, then remove excess resin solution on the surface of the wet film, place it in a vacuum...

Embodiment 3

[0045] Dissolve 8g of manganese nitrate in 1130 milliliters of methanol-water mixed solution, wherein the volume ratio of methanol to water is 1:1, stir and mix to form a uniform solution to obtain manganese nitrate solution; take a certain weight of perfluorosulfonic acid resin (chinafion, EW900) is dissolved in N, N-dimethylformamide, and the perfluorosulfonic acid resin solution that the mass percentage concentration is 0.7% is prepared to obtain; The perfluorosulfonic acid resin solution that adopts manganese nitrate solution titration to pH 7.5, obtain the manganese ion type resin alcohol aqueous solution; Place the clean porous polyhexafluoropropylene film (PTFE) with a thickness of 20 microns and a porosity of 60% in this manganese ion type resin solution and soak for 5 minutes, then remove excess water from the surface of the wet film After removing the resin solution, place it in a vacuum drying oven, adjust the temperature to 260°C, and heat-treat for 8 minutes; in or...

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Abstract

The invention provides a perfluorosulfonic composite proton exchange membrane for a fuel cell and a preparation method thereof. Perfluorosulfonic resin formed by perfluorosulfonic resin, M-type perfluorosulfonic resin and porous polymer enhanced materials is H-type resin with sulfonic acid groups (-SO3-) or F-type resin with sulfuryl fluoride groups (-SO2F-). The M-type perfluorosulfonic resin is cerium or / and manganese metal ion type perfluorosulfonic resin formed in a way that cerium or / and manganese ions are fully exchanged with sulfonic acid groups or sulfuryl fluoride groups in perfluorosulfonic resin. Cerium or / and manganese ions can be evenly distributed on the membrane body, the thermal stability is high, the heat treatment temperature of the composite membrane is improved, the combination of the porous polymer enhanced materials with the perfluorosulfonic resin is facilitated, the prepared composite proton exchange membrane has good mechanical strength and proton conductivity capacity, and the performance of the fuel cell is improved.

Description

technical field [0001] The invention relates to a proton exchange membrane, in particular to a perfluorosulfonic acid composite proton exchange membrane for a fuel cell and a preparation method thereof. Background technique [0002] The currently widely used proton exchange membrane is the Nafion series perfluorosulfonic acid proton exchange membrane produced by DuPont, which has the advantages of high proton conductivity and good chemical stability. However, this kind of membrane material still has some deficiencies in some performance aspects, which cannot meet the requirements of commercialization, such as low proton conductivity at high temperature, poor dimensional stability, and low mechanical strength, which need to be solved urgently. Especially in terms of dimensional stability, the swelling rate of the film is also different due to different water absorption rates under different humidity. In addition, when the perfluorosulfonic acid proton exchange membrane opera...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M2/16C08J5/22C08L27/12H01M8/1053H01M8/1067H01M8/1069
CPCY02E60/12Y02E60/50
Inventor 张永明刘萍唐军柯宋学章赵淑会
Owner SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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