A fuel cell composite proton exchange membrane and its preparation method

A proton exchange membrane and fuel cell technology, applied in fuel cells, electrolytes, circuits, etc., can solve the problems of reducing the thickness of proton exchange membranes, which are difficult and difficult, and achieve the effect of improving battery performance, reducing dosage and good hydrophilicity.

Active Publication Date: 2022-05-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, how to effectively reduce the thickness of the proton exchange membrane while ensuring the excellent performance of the proton exchange membrane, so as to achieve the purpose of reducing costs, is extremely difficult

Method used

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  • A fuel cell composite proton exchange membrane and its preparation method
  • A fuel cell composite proton exchange membrane and its preparation method
  • A fuel cell composite proton exchange membrane and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment prepares perfluorosulfonic acid resin / polytetrafluoroethylene / resveratrol (PFSA / PTFE / resveratrol) composite proton exchange membrane, and its preparation method comprises the following steps:

[0052] (1) Cut a piece of polytetrafluoroethylene (PTFE) film (PTFE) with a thickness of 10cm*10cm and a thickness of 7 μm with scissors, and fix it with a mold; take 500ml of ethanol solution in a crystallization dish with a diameter of 180mm, and slowly put the fixed PTFE into In the ethanol solution, let it stand and soak in a cool place for 24 hours; weigh 500mg of dopamine hydrochloride reagent and 788mg of trishydroxymethylaminomethane hydrochloride in a crystal dish with a diameter of 180mm, add 500ml of deionized water to prepare the solution, and add dropwise 1mol / L NaOH solution until the pH of the solution is 8.5; put the PTFE soaked for 24 hours into the dopamine buffer solution at a constant speed, keep it parallel to the horizontal plane, and place i...

Embodiment 2

[0059] This example prepares a perfluorosulfonic acid resin / polytetrafluoroethylene / quercetin (PFSA / PTFE / quercetin) composite proton exchange membrane, the preparation method of which is basically the same as in Example 1, except that step (1) 1mg of resveratrol in the drug was replaced by 1mg of quercetin.

Embodiment 3

[0061] This embodiment prepares perfluorosulfonic acid resin / polytetrafluoroethylene / resveratrol (PFSA / PTFE / resveratrol) composite proton exchange membrane, and its preparation method is basically the same as in Example 1, except that the step ( In 1), polytetrafluoroethylene is perpendicular to the horizontal plane in the dopamine buffer solution, and the included angle is 90°, and it is also perpendicular to the horizontal plane during the cleaning step.

[0062] The prepared proton exchange membrane is subjected to performance analysis, the results are as follows:

[0063] image 3 It is a scanning electron microscope image before and after modification of the polytetrafluoroethylene film in Example 1. It can be seen from Figure a) and c) that compared with before modification, the internal microporous structure of polytetrafluoroethylene after modification is orderly, indicating that polydopamine treatment can effectively optimize the internal microporous structure of the...

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Abstract

The invention discloses a fuel cell composite proton exchange membrane and a preparation method thereof. The PTFE is placed in a dopamine buffer solution for modification treatment, and the coating conditions are precisely controlled by adjusting the angle of the membrane in the solution. The hydrophilicity of vinyl fluoride is significantly improved, and a high boiling point solvent can be directly used to cast a membrane to prepare a composite proton exchange membrane. The fuel cell composite proton exchange membrane prepared by the invention has the advantages of low thickness, long service life and good performance. The operation process of the invention has the characteristics of being simple, safe, easy to scale up and applied to industrialization, and can be used in the production of fuel cell proton exchange membranes.

Description

technical field [0001] The invention relates to a membrane material and a preparation process thereof, in particular to a fuel cell proton exchange membrane and a preparation method thereof. Background technique [0002] Hydrogen energy is a renewable energy with great development potential. Hydrogen fuel cell, as one of the main applications of hydrogen energy, has attracted people's attention due to its high efficiency and environmental friendliness. However, the large-scale commercial application of proton exchange membrane fuel cells is still limited by its high cost, and the cost of proton exchange membranes needs to be solved urgently. [0003] Proton exchange membranes are usually made of perfluorosulfonic acid resins, the most representative of which is the Nafion resin developed by DuPont in the late 1960s. At present, in order to reduce costs, reducing the film thickness by reducing the amount of resin is the fastest and most effective method. However, it is extr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1041H01M8/1023H01M8/1072H01M8/1086H01M8/1088C08J5/22C08L27/18
CPCH01M8/1041H01M8/1023H01M8/1072H01M8/1088H01M8/1093C08J5/2287H01M2300/0094C08J2327/18C08J2479/04Y02E60/50
Inventor 刘建国霍有修李佳芮志岩
Owner NANJING UNIV
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