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Preparation method of composite proton exchange membrane for fuel cell

A proton exchange membrane and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems that affect the uniformity of the membrane, cannot control the temperature uniformity of the membrane material, and cannot solve the problems of catalyst adhesion on the proton exchange membrane. Achieve the effect of improving adhesion and improving thickness uniformity

Active Publication Date: 2022-02-01
长园泽晖新能源材料研究院(珠海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method cannot control the temperature uniformity of the membrane material, and the temperature of ±20°C seriously affects the uniformity of the membrane.
Patent CN111009667B introduces the method of coating the catalyst on the A side of the proton exchange membrane, and then compounding the protective film on the catalyst surface to continue compounding the B side on the proton exchange membrane. Adhesion issues on

Method used

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  • Preparation method of composite proton exchange membrane for fuel cell
  • Preparation method of composite proton exchange membrane for fuel cell
  • Preparation method of composite proton exchange membrane for fuel cell

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preparation example Construction

[0026] A preparation method for a composite proton exchange membrane for a fuel cell, comprising the following steps:

[0027] S1, preparation of perfluorosulfonic acid resin solution: F + Type perfluorosulfonic acid resin particles for H + Typing converts it to H + Type perfluorosulfonic acid resin: sequentially to F + Type perfluorosulfonic acid resin particles alkaline washing, washing, pickling, washing, drying. The specific steps are as follows: the F + Type perfluorosulfonic acid resin particles are soaked in alkaline solution at 60-100°C for 16-24h for hydrolysis treatment, soaked in deionized water at 40-80°C for 5-10h to neutral, and then soaked in acidic solution 4-8h, repeat 6-8 times, wash with deionized water, filter and dry to get H + type perfluorosulfonic acid resin. Then add it into a reaction kettle equipped with water and a high-boiling point solvent, heat and stir to dissolve, and obtain a perfluorosulfonic acid resin solution.

[0028] In the above ...

Embodiment 1

[0034] A preparation method for a composite proton exchange membrane for a fuel cell, comprising the following steps:

[0035] S1, preparation of perfluorosulfonic acid resin solution:

[0036] ① Soak F+ type perfluorosulfonic acid resin pellets in 15% potassium hydroxide aqueous solution at 90°C for 20 hours, and perform hydrolysis treatment to obtain K+ type perfluorosulfonic acid resin pellets. Then soak in deionized water at 60°C for 5 hours until neutral, then put it into 2mol / L hydrochloric acid aqueous solution, soak for 4 hours, repeat 6 times. Wash the granular material with deionized water, filter and dry to obtain H+ type perfluorosulfonic acid resin (PFSA);

[0037] ②Put the above-mentioned granules and water and MMB in a closed autoclave at a mass ratio of 8:1, heat and stir at 150°C for 4 hours to dissolve, and obtain a perfluorosulfonic acid resin (PFSA) with a mass fraction of 25% after cooling solution.

[0038] S2, the preparation of catalyst slurry

[00...

Embodiment 2～6

[0044] The difference between Examples 2-6 and Example 1 is that the pre-drying temperature in step S3 is different, the specific components are shown in Table 1, and other components, steps and parameters are the same.

[0045] The drying temperature of table 1 embodiment 1~6 step S3

[0046] project Pre-drying temperature primary drying temperature secondary drying temperature Example 1 60℃ 60℃ 100℃ Example 2 40℃ 60℃ 100℃ Example 3 50℃ 60℃ 100℃ Example 4 70℃ 60℃ 100℃ Example 5 80℃ 60℃ 100℃ Example 6 90℃ 60℃ 100℃

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Abstract

The invention discloses a preparation method of a composite proton exchange membrane for a fuel cell, and belongs to the technical field of fuel cells. The preparation method comprises the steps of performing H < + > conversion treatment on F < + > type perfluorinated sulfonic acid resin particles to convert the F < + > type perfluorinated sulfonic acid resin particles into H < + > type perfluorinated sulfonic acid resin, dissolving the H < + > type perfluorinated sulfonic acid resin, and adding water and a high-boiling-point solvent to prepare a perfluorinated sulfonic acid resin solution; adding water, a high-boiling-point solvent, a surfactant and a catalyst Pt40 / C60 into part of the perfluorinated sulfonic acid resin solution, and performing ultrasonic dispersion to obtain catalyst slurry; coating the surface of a base material with the perfluorinated sulfonic acid resin solution, and pre-drying at 50-80 DEG C to obtain a viscoelastic proton exchange membrane; and coating the surface of the viscoelastic proton exchange membrane with the catalyst slurry, and carrying out primary drying and secondary drying to obtain the composite proton exchange membrane. According to the preparation method disclosed by the invention, the catalyst can be uniformly distributed on the surface of the proton exchange membrane, the adhesive force of catalyst particles on the proton exchange membrane is effectively improved, and the thickness uniformity is improved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing a composite proton exchange membrane for fuel cells. Background technique [0002] A fuel cell is an energy conversion device used to convert the electrochemical energy in hydrogen, natural gas or other hydrocarbon fuels into electrical energy, and is the main utilization method of hydrogen energy. Unlike conventional batteries, which provide electricity by storing energy, fuel cells rely on a steady supply of external fuel and oxygen to continuously generate electricity. Compared with traditional energy utilization methods, fuel cells do not require direct combustion, thereby avoiding the limitation of the Carnot cycle, and have many advantages such as high energy conversion efficiency, low pollution, and low noise, and are considered to be a kind of energy utilization with great potential. Way. Fuel cells will be widely used in automobiles, airplanes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1004
CPCH01M8/1004Y02E60/50Y02P70/50
Inventor 吴浩松刘方刘瑾豪
Owner 长园泽晖新能源材料研究院(珠海)有限公司
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