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A kind of preparation method of graphene quantum dot modified proton exchange membrane

A technology of graphene quantum dots and proton exchange membranes, which is applied in the direction of electrochemical generators, fuel cells, electrical components, etc., can solve the problems of PTFE microporous membrane filling, improve toughness, improve proton conductivity, and improve moisture retention and the effect of temperature resistance

Active Publication Date: 2020-03-24
苏州创明氢电材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These studies are based on micron-scale mixing. These micron-scale GO-resin mixtures cannot be used to fill PTFE microporous membranes due to size problems, and can only form films by themselves, with limited improvements in strength, swelling, and resin dosage.

Method used

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  • A kind of preparation method of graphene quantum dot modified proton exchange membrane
  • A kind of preparation method of graphene quantum dot modified proton exchange membrane
  • A kind of preparation method of graphene quantum dot modified proton exchange membrane

Examples

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Embodiment 1

[0020] The present embodiment provides a kind of preparation method of graphene quantum dot modified proton exchange membrane, and it comprises the following steps:

[0021] (a) Stir and mix 10ml aqueous solution (2g / L) of graphene oxide quantum dots (GQDs, Qingdao Haidaene New Material Co., Ltd.) with 100ml 5% perfluorosulfonic acid resin solution (Nafion DUPONT D520) for 8h, stir The rotation speed is 3000 rpm; the mixed solution is obtained after the stirring (the mass ratio of graphene quantum dots and perfluorosulfonic acid resin in the mixed solution is 1:250);

[0022] (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 0.07 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

[0024] The present embodiment provides a kind of preparation method of graphene quantum dot modified proton exchange membrane, and it comprises the following steps:

[0025] (a) Stir and mix 25ml aqueous solution (2g / L) of graphene oxide quantum dots (GQDs, Qingdao Haidaene New Material Co., Ltd.) with 100ml 5% perfluorosulfonic acid resin solution (Nafion DUPONT D520) for 8h, stir The rotating speed is 3000 revs / min; the mixed solution is obtained after the stirring (the mass ratio of graphene quantum dots and perfluorosulfonic acid resin in the mixed solution is 1: 100);

[0026] (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 0.07 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 3

[0028] The present embodiment provides a kind of preparation method of graphene quantum dot modified proton exchange membrane, and it comprises the following steps:

[0029] (a) Stir and mix 50ml aqueous solution (2g / L) of graphene oxide quantum dots (GQDs, Qingdao Haidaene New Material Co., Ltd.) with 100ml 5% perfluorosulfonic acid resin solution (Nafion DUPONT D520) for 8h, stir The rotating speed is 3000 revs / min; the mixed solution is obtained after the stirring (the mass ratio of graphene quantum dots and perfluorosulfonic acid resin in the mixed solution is 1: 50);

[0030] (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 0.07 μm, porosity 75%, thickness 15 μm), place it in 80~160° C. and dry; Repeat 5 to 8 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 a graphene quantum dot modified proton exchange membrane. The preparation method comprises the following steps: (1) graphene quantum dots or an aqueoussolution or an alcoholic solution of derivatives thereof and a proton conductor resin solution are mixed in order to obtain a mixed solution; the mass ratio of the graphene quantum dots or derivatives thereof to the proton conductor resin is 0.2-10:90-99.8; (b) the mixed solution is dipped and coated on the surface of a PTFE millipore membrane, room temperature air drying, dip-coating, and dryingare carried out, and the processes are repeated for multiple times. The method can be used for improving toughness and oxidation resistance of the PTFE millipore membranes; and the method can be usedfor improving proton conductivity, and moisture prevention and temperature toleration of the membrane.

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 a 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 proton conducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1041H01M8/1088
CPCH01M8/1055H01M8/1088Y02E60/50
Inventor 田丙伦徐海波
Owner 苏州创明氢电材料科技有限公司