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Method for preparing PEM membrane electrode for hydrogen production by electrolyzing water through electrostatic spinning method

An electrospinning method and electrospinning technology, which are applied in the field of membrane electrode preparation, can solve the problems of increasing the cost of membrane electrode preparation, and achieve the effects of improving performance, cheap raw materials, and accelerating proton conduction

Pending Publication Date: 2022-07-29
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires the transfer substrate, which increases the preparation cost of the membrane electrode.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] S1 Prepare the base film of the membrane electrode: place the Nafion115 membrane (5cm×5cm) at 60℃, 5%H 2 O 2 Treated in aqueous solution for 40min, rinsed the membrane repeatedly with deionized water, then treated the membrane in deionized water at 80°C for 30min; then at 80°C, treated in 0.5mol / L sulfuric acid aqueous solution for 50min; rinsed the membrane repeatedly with deionized water Then, the membrane was treated in deionized water at 80°C for 30 min, taken out, and used as the bottom membrane of the membrane electrode after the membrane was naturally cooled;

[0047] S2 Preparation of cathode catalyst slurry: Weigh 12.5 mg of Pt / C powder with a platinum content of 20%, 12.5 mL of deionized water and 12.5 mL of ethanol and stir and mix to form a solution, and the solution is ultrasonically dispersed in an ice-water bath for 20 min; Add 62.5 mg of Nafion solution with a mass concentration of 20%, and ultrasonically disperse it in an ice-water bath for 40 min to o...

Embodiment 2

[0051] S1 Prepare the base film of the membrane electrode: place the Nafion117 membrane (5cm×5cm) at 80℃, 2%H 2 O 2 Treated in aqueous solution for 60min, rinsed the membrane repeatedly with deionized water, then treated the membrane in deionized water at 80°C for 30min; then at 60°C, treated in 1 mol / L sulfuric acid aqueous solution for 60min; rinsed the membrane repeatedly with deionized water , and then the membrane was treated in deionized water at 80°C for 30 min, taken out, and used as the bottom membrane of the membrane electrode after the membrane was naturally cooled;

[0052] S2 Preparation of cathode catalyst slurry: Weigh 18.75 mg of Pt / C powder with a platinum content of 40%, 20 mL of deionized water and 100 mL of isopropanol with stirring to form a solution, and ultrasonically disperse the solution in an ice-water bath for 20 min; Add 1.5 g of polyvinylpyrrolidone to the mixture, and ultrasonically disperse it in an ice-water bath for 40 minutes to obtain a cath...

Embodiment 3

[0056] S1 Prepare the bottom film of the membrane electrode: soak the polybenzimidazole membrane in a 2 mol / L phosphoric acid aqueous solution for 7 days; take it out and use it as the bottom membrane of the membrane electrode after the membrane is naturally dried;

[0057] S2 Prepare cathode catalyst slurry: Weigh 8 mg of Pt / C powder with a platinum content of 60%, 10 mL of deionized water and 100 mL of ethylene glycol, and stir and mix to form a solution, and the solution is ultrasonically dispersed in an ice-water bath for 20 min; Add 160 mg of polyvinyl alcohol, and ultrasonically disperse it in an ice-water bath for 60 minutes to obtain the cathode catalyst slurry;

[0058] S3 Preparation of anode catalyst slurry: Weigh 10 mg of iridium dioxide powder with a mass concentration of 95%, 15 mg of carbon black, 25 mL of deionized water and 150 mL of ethanol to form a solution, and the solution is ultrasonically dispersed in an ice-water bath for 60 min; Add 200 mg of hydroxye...

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PUM

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Abstract

The invention discloses a method for preparing a PEM membrane electrode for hydrogen production by electrolyzing water through an electrostatic spinning method. Specifically, catalyst slurry is uniformly spun on a membrane electrode base membrane by adopting an electrostatic spinning method, the spun catalyst layer is fluffy and porous, and a channel is provided for smoothly transferring reactant water to a reaction site of catalyst particles, so that the performance of the membrane electrode is greatly improved; the spun catalyst layer contains a large amount of-OH,-NH2 and other groups, and a hydrophilic region formed by the groups can accelerate proton conduction and improve the performance of the membrane electrode; the process for preparing the PEM membrane electrode for hydrogen production through water electrolysis by adopting the electrostatic spinning method is simple in line, the raw materials are cheap and easy to obtain, continuous production can be realized, and the technology is the development direction of the PEM membrane electrode for hydrogen production through water electrolysis in the future.

Description

technical field [0001] The invention relates to the field of membrane electrode preparation, in particular to a method for preparing a membrane electrode for PEM electrolysis water hydrogen production by an electrostatic spinning method. Background technique [0002] With the development of society, the energy crisis has become the focus of global attention. Therefore, it is imperative to develop a new type of energy. However, because the transportation and storage of wind, solar and nuclear energy is very difficult, it is necessary to find a renewable and environmentally friendly new energy source. Hydrogen energy is highly efficient, non-polluting and can be easily produced. It is considered to be the most ideal and potential energy carrier in the future. Hydrogen production methods include methanol decomposition to produce hydrogen, ammonia decomposition to produce hydrogen, biological hydrogen production, solar hydrogen production, fossil fuel hydrogen production and wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/053D01D5/00C25B11/081C25B11/075C25B11/036
CPCC25B1/04C25B11/053D01D5/003D01D5/0076C25B11/081C25B11/075C25B11/036
Inventor 王丽华汪前东何敏陈葛峰仇智罗小军陈善云
Owner INST OF CHEM CHINESE ACAD OF SCI
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