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High temperature proton exchange membrane for fuel cell, and preparation method thereof

A technology of proton exchange membrane and fuel cell, which is applied in fuel cell parts, fuel cells, battery pack parts, etc., and can solve problems such as affecting the commercialization process.

Active Publication Date: 2012-03-14
北京海得利兹新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned problems of PBI-PA have largely affected its commercialization process

Method used

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  • High temperature proton exchange membrane for fuel cell, and preparation method thereof
  • High temperature proton exchange membrane for fuel cell, and preparation method thereof
  • High temperature proton exchange membrane for fuel cell, and preparation method thereof

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preparation example Construction

[0017] The method for preparing a high-temperature proton exchange membrane according to an embodiment of the present invention includes two steps of preparation of a homogeneous blend membrane and post-protonation treatment.

[0018] According to an embodiment of the present invention, the preparation of the high temperature resistant homogeneous blend membrane includes:

[0019] Dissolve the engineering plastic-like skeleton polymer with excellent chemical corrosion resistance and thermal stability in a suitable solvent (such as DMF, DMAC, NMP, DMSO) to obtain a transparent polymer solution, the concentration of which is usually 1 to 15 wt%. The best concentration is 3-10%, and the best concentration range is 4-8%.

[0020] Dissolve the hydrophilic polymer with N-heterocycle in the side chain, which has chemical corrosion resistance and thermal stability, in the same solvent as the previous polymer to obtain a transparent polymer solution, and its concentration is usually 1 ...

Embodiment 1

[0039] Weigh 1 weight unit of polyphenylsulfone (PPSF), dissolve it in 9 weight units of N,N-dimethylformamide (DMF), and stir until completely dissolved;

[0040] Weigh 1 weight unit of polyvinylpyrrolidone (PVP), dissolve it in 9 weight units of N,N-dimethylformamide (DMF), and stir until completely dissolved;

[0041] Mix the above two polymer solutions together and stir evenly, degas the polymer solution and cast it on a clean and flat solid surface (such as a glass plate) and dry the volatile solvent at 50°C to form a film.

[0042] After stripping, soak the obtained homogeneous blended membrane in concentrated phosphoric acid with a mass ratio of 60wt% for 36 hours, take out and dry the floating acid on the surface, and obtain a high-performance high-temperature proton exchange membrane.

[0043] The resulting high temperature proton exchange membrane has high mechanical properties and good flexibility. The mechanical performance test adopts the national standard GB1302...

Embodiment 2

[0046] Weigh 1 weight unit of polysulfone (PSF), dissolve it in 10 weight units of N,N-dimethylacetamide (DMAc), and stir until completely dissolved;

[0047] Weigh 1.5 weight units of polyvinylpyrrolidone (PVP) and dissolve it in 10 weight units of N,N-dimethylformamide (DMAc), and stir until completely dissolved;

[0048] The above two polymer solutions are mixed together and stirred evenly,

[0049] After the polymer solution was degassed, the volatile solvent was dried at 60°C by casting method to form a film.

[0050] After demoulding, soak the obtained homogeneous blended membrane in concentrated phosphoric acid with a mass ratio of 70wt% for 24 hours, take out and dry the floating acid on the surface, and obtain a high-performance high-temperature proton exchange membrane.

[0051] The resulting high temperature proton exchange membrane has high mechanical properties and good flexibility. The mechanical property test adopts the national standard GB13022-91 for measure...

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Abstract

The present invention discloses a high-performance polymer high temperature proton exchange membrane for a high temperature proton exchange membrane fuel cell, and a preparation method thereof. The method comprises: blending a polymer with excellent thermal stability and chemical stability (such as PES, PSF and other engineering plastics) and a hydrophilic polymer with N-heterocycle on a side chain (such as PVP, P4VP and the like); adopting tape casting membrane forming or solution casting membrane forming; after membrane removing, carrying out an acidification (phosphoric acid or / and heteropoly acid) treatment for the prepared homogeneous blended membrane so as to provide good high temperature proton conductivity for the membrane. The exchange membrane is a homogeneous, transparent, and compact membrane, has characteristics of excellent chemical stability, excellent thermal stability, excellent mechanical property and excellent high temperature proton conductivity, and can meet the application requirements of the high temperature proton exchange membrane fuel cell. The proton exchange membrane can further be used as the membrane material for high temperature water electrolysis apparatuses, high temperature batteries, super capacitors and other devices. The proton exchange membrane material has characteristics of low cost, simple preparation process, wide use temperature range (100-200 DEG C), good high temperature proton conductivity and excellent mechanical property.

Description

technical field [0001] The invention relates to a high-temperature proton exchange membrane and its preparation method, belonging to fuel cell technology technical background [0002] Proton exchange membrane fuel cells (PEMFCs) are power generating devices that directly convert the chemical energy in fuel and oxidant into electrical energy through electrochemical reactions. PEMFCs have become the fastest-growing and most mature type of fuel cell among all types of fuel cells due to their many advantages such as high power density, high energy conversion efficiency, compact battery structure, fast start-up speed, low environmental pollution, and wide application fields. . In recent years, high-temperature proton exchange membrane fuel cells (HT-PEMFCs) have become the mainstream development direction of proton exchange membrane fuel cells because they operate at higher temperatures (100-200°C) and have the following advantages: (1) cathode and anode The kinetic speed is si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16C08L81/06C08L27/16C08L27/20C08L39/06C08L39/08C08J5/18H01M8/0243
CPCY02E60/50
Inventor 卢善富相艳蒋三平
Owner 北京海得利兹新技术有限公司
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