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Preparation method of antioxidized graphene quantum dot modified proton exchange membrane

A technology of graphene quantum dots and proton exchange membranes, applied in electrochemical generators, fuel cells, electrical components, etc., can solve problems such as brittleness and cracking, and achieve the effect of increasing oxidation resistance and avoiding brittleness

Active Publication Date: 2018-10-09
上海博暄能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the Chinese invention patent with application number 201710893273.7 mixes the aqueous solution or alcohol solution containing graphene quantum dots or its derivatives with the proton conductor resin solution, and then dip-coats it on the surface of the PTFE microporous membrane and dries it, which is conducive to improving The electrical conductivity of the proton exchange membrane; however, the above-mentioned proton exchange membrane was found to have adverse consequences such as brittleness and cracking during actual use; with the support of the national key research and development project, the company's R&D team has overcome the above defects

Method used

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  • Preparation method of antioxidized graphene quantum dot modified proton exchange membrane
  • Preparation method of antioxidized graphene quantum dot modified proton exchange membrane

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preparation example Construction

[0017] The preparation method of the anti-oxidation graphene quantum dot modified proton exchange membrane of the present invention comprises the following steps: (a) mixing the aqueous solution of the graphene quantum dot or its derivatives with the proton conductor resin solution, then adding water-soluble porphyrin A mixed solution of organic matter or water-soluble phthalocyanine-type organic matter; the mass ratio of the graphene quantum dots or its derivatives to the proton conductor resin is 0.2-10:90-99.8, and the water-soluble porphyrin-type organic matter or The mass ratio of the water-soluble phthalocyanine organic matter to the proton conductor resin is 0.05-0.5:10; (b) dip-coating the mixed solution onto the surface of the hydrophilic PTFE microporous membrane, drying at room temperature, dip-coating, and drying; Repeat as many times as you want. By filling the PTFE microporous membrane with a proton conductor resin containing water-soluble porphyrins or water-sol...

Embodiment 1

[0022] The present embodiment provides a kind of preparation method of oxidation-resistant graphene quantum dot modified proton exchange membrane, and it comprises the following steps:

[0023] (a) 100ml aqueous solution (the content of graphene oxide quantum dots is 2g / L) of graphene oxide quantum dots (GQDs, Qingdao Haidaene New Material Co., Ltd.) and the same 100ml 5wt% perfluorosulfonic acid resin solution (Nafion DUPONTD520, density is about 1g / ml) stirring and mixing 8h, stirring speed 3000 revs / min; Then add 0.25g sulfonic acid group porphyrin and dissolve to obtain mixed solution;

[0024] (b) Fix the hydrophilic microporous membrane in the frame, dip-coat the above mixed solution onto the surface of the hydrophilic PTFE microporous membrane (pore diameter 0.5 μm, porosity 75%, thickness 15 μm), place it in 80~160° C. and dry; Repeat 3 to 5 times (that is, adopt the method of dipping-drying-multiple dipping-multiple times of drying).

Embodiment 2

[0026] The present embodiment provides a kind of preparation method of oxidation-resistant graphene quantum dot modified proton exchange membrane, and it comprises the following steps:

[0027] (a) 25ml aqueous solution (the content of graphene oxide quantum dots is 2g / L) of graphene oxide quantum dots (GQDs, Qingdao Haidaene New Material Co., Ltd.) was mixed with the same 100ml 5wt% perfluorosulfonic acid resin solution (Nafion DUPONTD520) was stirred and mixed for 8h, and the stirring speed was 3000 rpm; then 0.25g of tetra-β-p-sulfonic acid phenoxyzinc phthalocyanine was added and dissolved to obtain a mixed solution;

[0028] (b) Fix the hydrophilic microporous membrane in the frame, dip-coat the above mixed solution onto the surface of the hydrophilic PTFE microporous membrane (pore diameter 0.5 μm, porosity 75%, thickness 15 μm), place it in 80~160° C. and dry; Repeat 3 to 5 times (that is, adopt the method of dipping-drying-multiple dipping-multiple times of drying).

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Abstract

The invention relates to a preparation method of an antioxidized graphene quantum dot modified proton exchange membrane. The preparation method comprises the following steps that (a) a water solutionof graphene quantum dots or derivatives of the graphene quantum dots and a proton conductor resin solution are mixed; then, a water-soluble porphyrin organic matter or a water-soluble phthalocyanine organic matter is added to obtain a mixed solution, wherein the mass ratio of the graphene quantum dots or the derivatives of the graphene quantum dots to proton conductor resin is (0.2 to 10):(90 to 99.8); the mass ratio of the water-soluble porphyrin organic matter or the water-soluble phthalocyanine organic matter to the proton conductor resin is (0.05 to 0.5):10; (b) the mixed solution is subjected to dip-coating on the surface of a hydrophilic PTFE microporous membrane; room-temperature drying, dip-coating and drying are performed; the operations are repeated for many times. Therefore theporphyrin and phthalocyanine type organic matters and the proton conductor resin can be bonded, so that the loss is avoided; the antioxygenation of the proton exchange membrane is improved.

Description

technical field [0001] The invention belongs to the field of fuel cell parts and relates to a proton exchange membrane, in particular to a preparation method of an anti-oxidation graphene quantum dot modified proton exchange membrane. Background technique [0002] Proton exchange membrane (PEM) is the core component of proton exchange membrane fuel cell (PEMFC), and PEMFC is regarded as one of the most promising clean energy conversion technologies with a huge potential market. Proton exchange membrane (PEM) is one of the key components restricting the commercial application of proton exchange membrane fuel cell (PEMFC), and it is a hotspot in the research of fuel cell technology. [0003] The PEMFCs that have been developed and applied are mainly low-temperature fuel cells, using perfluorosulfonic acid polymers such as DuPont's Nafion as PEM. However, Nafion evaporates and loses water under high temperature and low humidity conditions, which leads to a sharp decline in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1048H01M8/1051H01M8/1069
CPCH01M8/1048H01M8/1051H01M8/1069Y02E60/50
Inventor 魏亚南徐能能王敏张琪聂琦董芳乔锦丽田丙伦
Owner 上海博暄能源科技有限公司