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Organic-inorganic composite proton exchange membrane for proton exchange membrane fuel cell and preparation method thereof

A proton exchange membrane and inorganic composite technology, applied in solid electrolyte fuel cells, fuel cell components, final product manufacturing, etc., can solve problems such as battery performance attenuation, conductivity drop, loss, etc.

Active Publication Date: 2015-05-27
北京海得利兹新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the current heteropolyacid-doped composite membrane, because the heteropolyacid has good water solubility, the composite membrane has the problem of heteropolyacid dissolution loss, especially in the environment of DMFC (direct methanol fuel cell) , there is a lot of running water, and the heteropoly acid will gradually lose due to its strong hydrophilicity, resulting in a decrease in conductivity, and eventually the performance of the battery will also be greatly reduced

Method used

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  • Organic-inorganic composite proton exchange membrane for proton exchange membrane fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 1 weight unit of polyphenylsulfone (PPSF) and 1 weight unit of polyvinylpyrrolidone (PVP), dissolve them in 18 weight units of N,N-dimethylformamide (DMF), and stir until completely dissolved;

[0027] Weigh 1 weight unit of phosphotungstic acid, dissolve it in 9 weight units of N,N-dimethylformamide (DMF), and stir until completely dissolved;

[0028] Mix the above two solutions together and stir evenly. After degassing the polymer solution, 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.

[0029] The obtained organic-inorganic composite proton exchange membrane has high mechanical properties and good flexibility. The mechanical performance test adopts the national standard GB13022-91 for measurement, the instrument used is CMT6202, the tensile strength is 35MPa, and the elongation at break reaches 40%.

[0030] The obtained organic-inorganic composite proton exchange membrane has good proton...

Embodiment 2

[0032] Weigh 1 weight unit of polysulfone (PSF) and 1.5 weight units of polyvinylpyrrolidone (PVP), dissolve them in 10 weight units of N,N-dimethylacetamide (DMAc), and stir until completely dissolved;

[0033] Weigh 1.5 weight units of phosphotungstic acid, dissolve it in 8.5 weight units of N,N-dimethylformamide (DMF), and stir until completely dissolved;

[0034] The above two polymer solutions were mixed together and stirred evenly, the polymer solution was degassed, and then the volatile solvent was dried at 60° C. by casting method to form a film.

[0035] The obtained organic-inorganic composite proton exchange membrane has high mechanical properties and good flexibility. The mechanical performance test is measured by the national standard GB13022-91, the instrument used is CMT6202, the tensile strength is 32MPa, and the elongation at break reaches 50%.

[0036] The obtained organic-inorganic composite proton exchange membrane has good proton conductivity, and the con...

Embodiment 3

[0038] Weigh 1 weight unit of polyethersulfone (PES) and 2 weight units of polyvinylpyrrolidone (PVP), dissolve them in 11 weight units of N-methylpyrrolidone (NMP), stir until completely dissolved; mix the above two The polymer solutions were mixed together and stirred evenly,

[0039] Weigh 2 weight units of phosphotungstic acid, dissolve it in 8 weight units of N,N-dimethylformamide (DMF), and stir until completely dissolved;

[0040] The above two polymer solutions were mixed together and stirred evenly, the polymer solution was degassed, and the volatile solvent was dried at 70° C. by casting method to form a film.

[0041] The obtained organic-inorganic composite proton exchange membrane has high mechanical properties and good flexibility. The mechanical performance test is measured by the national standard GB13022-91, the instrument used is CMT6202, the tensile strength is 28MPa, and the elongation at break reaches 58%.

[0042]The obtained organic-inorganic composite...

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Abstract

The invention discloses an organic-inorganic composite proton exchange membrane for a proton exchange membrane fuel cell and a preparation method thereof. The proton exchange membrane comprises a functional polymer (such as polyvinylpyrrolidone) of which the side chain contains N-heterocycle, heteropoly acid and skeleton polymers (such as polyvinylidene fluoride, polyethersulfone, polysulfone and polyethylene sulfone). The preparation method comprises adding the functional polymer, the skeleton polymers and the heteropoly acid into an organic solvent (such as N, N-dimethyl formamide, N, N-dimethyl acetamide and N-methyl-2-pyrrolidone), heating the mixture with stirring until complete dissolution so that a transparent and uniform proton exchange membrane solution is obtained, and carrying out solution casting or curtain coating to obtain the organic-inorganic composite proton exchange membrane. The organic-inorganic composite proton exchange membrane is uniform, transparent and compact, has excellent chemical stability, heat stability, mechanical properties and proton conductivity, and does not lost a proton conductor easily. The preparation method utilizes easily available and cheap raw materials, has simple processes, is suitable for large-scale production and can be widely used in fuel cells, flow cells, plumbic acid cells and a water-electrolyser.

Description

technical field [0001] The invention relates to an organic-inorganic composite proton exchange membrane for a proton exchange membrane fuel cell and a preparation method thereof, belonging to the fields of new material technology and new energy technology. Background technique [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. . [0003] Existing perfluorosulfonic acid proton exchange membranes widely used in proton exchange membrane fuel cells (≤80°C) (such as those produced by DuPont, USA) series membrane), its thermal stabil...

Claims

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Application Information

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IPC IPC(8): H01M8/10H01M8/02C08J5/22
CPCY02E60/50Y02P70/50
Inventor 王海宁王凤玉张艳
Owner 北京海得利兹新技术有限公司
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