Application of sulfonated polyaryletherketone as binder in membrane electrode of proton exchange membrane fuel cell, membrane electrode and preparation method

A sulfonated polyaryl ether ketone and proton exchange membrane technology, applied in fuel cells, battery electrodes, circuits, etc., can solve problems that are not conducive to the electrochemical performance of proton exchange membrane fuel cells, reduce the electrochemical active area of ​​electrodes, and reduce solvent residue more questions

Pending Publication Date: 2021-07-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the electrode preparation process, due to the difficulty of completely removing the high boiling point solvent, there are more solvent residues adsorbed on the surface of the catalyst, which reduces the electrochemical active area of ​​the electrode and is not conducive to the acquisition of good electrochemical performance of the proton exchange membrane fuel cell.

Method used

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  • Application of sulfonated polyaryletherketone as binder in membrane electrode of proton exchange membrane fuel cell, membrane electrode and preparation method
  • Application of sulfonated polyaryletherketone as binder in membrane electrode of proton exchange membrane fuel cell, membrane electrode and preparation method
  • Application of sulfonated polyaryletherketone as binder in membrane electrode of proton exchange membrane fuel cell, membrane electrode and preparation method

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preparation example Construction

[0082] The present invention also provides a method for preparing the membrane electrode described in the above technical solution, comprising the following steps:

[0083] Mixing the sulfonated polyaryletherketone solution and the catalyst to obtain a catalyst slurry, the solvent in the sulfonated polyaryletherketone solution is a low boiling point solvent, and the boiling point of the low boiling point solvent is lower than 100°C;

[0084] Coating the catalyst slurry on both sides of the proton exchange membrane, removing the solvent in the sulfonated polyaryletherketone solution, forming a first catalyst layer and a second catalyst layer on both sides of the proton exchange membrane to obtain a primary membrane electrode ;

[0085] Composite the first gas diffusion layer and the second gas diffusion layer on both sides of the primary membrane electrode to obtain the membrane electrode.

[0086] The invention mixes the sulfonated polyaryletherketone solution and the catalys...

Embodiment 1

[0096] 4.3641g of 4,4'-difluorobenzophenone, 12.6687g of 4,4'-difluorobenzophenone-3,3'-disodium sulfonate, 12.1152g of 3,3', Mix 5,5'-tetramethyl-4,4'-dihydroxybiphenyl, 87.44g sulfolane and 7.59g anhydrous potassium carbonate, heat up to 140°C for 3 hours under nitrogen protection, and heat up at a rate of 0.3°C / mn React at 210°C for 3 hours to obtain sulfonated polyaryletherketone sodium salt;

[0097] The obtained sulfonated polyaryletherketone sodium salt and 1mol / L of H 2 SO 4 Mix to carry out displacement reaction on the sodium salt of sulfonated polyaryletherketone. After the displacement reaction is completed, the solid product is ground, washed repeatedly with water, and then dried at 60° C. for 24 hours to obtain the sulfonated polyaryletherketone.

[0098] The obtained sulfonated polyaryletherketone of embodiment 1 is carried out nuclear magnetic resonance test, and gained nuclear magnetic resonance spectrum figure is shown in figure 1 . Depend on figure 1 It ...

Embodiment 2

[0106] 10.9103g of 4,4'-difluorobenzophenone, 12.1152g of 3,3',5,5'-tetramethyl-4,4'-dihydroxybiphenyl, 69.07g of sulfolane and 7.59g of Mix with water and potassium carbonate, raise the temperature to 140°C for 3 hours under the protection of nitrogen, then raise the temperature to 210°C for 3 hours at a rate of 0.6°C / min, pour the obtained product system into water, grind the obtained solid product, and wash with water repeatedly After drying at 80°C for 12 hours, polyaryletherketone was obtained;

[0107] Dissolve 10g of polyaryletherketone in 150mL of concentrated sulfuric acid, react at 80°C for 6h, pour the product system into ice water, filter, adjust the solid product to pH 8 with NaOH, wash with deionized water until neutral, and Dry at 60°C for 24 hours to obtain sulfonated polyaryletherketone sodium salt with a sulfonation degree of 1.2;

[0108] Soak the obtained sulfonated polyarylether ketone sodium salt in 60°C, 1mol / L H 2 SO 4 The replacement reaction was ca...

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to application of sulfonated polyaryletherketone as a binder in a membrane electrode of a proton exchange membrane fuel cell. According to the invention, the sulfonated polyaryletherketone as a binder can be completely dissolved in a low-boiling-point solvent, and the problem that a high-boiling-point solvent is difficult to remove after the binder is dissolved in the high-boiling-point solvent, so that a large amount of the high-boiling-point solvent is remained on a catalyst layer and the catalyst is poisoned is solved. The sulfonated polyaryletherketone is used as a binder of a catalyst layer, so that the interfacial compatibility of the catalyst layer and a proton exchange membrane is improved, an excellent three-phase reaction interface of fuel gas, water and a catalyst can be constructed, and proton transfer, material transportation and charge transfer in the catalyst layer are smoothly carried out. Meanwhile, the proton conductivity of sulfonated polyaryletherketone is excellent, so that high-efficiency transfer of protons in a catalyst layer of the proton exchange membrane fuel cell is guaranteed, and the power of the proton exchange membrane fuel cell is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to the application of a sulfonated polyaryletherketone as a binder in a membrane electrode of a proton exchange membrane fuel cell, the membrane electrode and a preparation method. Background technique [0002] Proton exchange membrane fuel cells have the advantages of high energy efficiency and energy density, small volume and weight, short cold start time and safe and reliable operation, and because the electrolyte membrane used is solid, electrolyte corrosion can be avoided, and it is widely used in the automotive industry, energy power generation , shipbuilding industry, aerospace and household power and other industries. [0003] The core component of a proton exchange membrane fuel cell is the membrane electrode, which is mainly composed of a proton exchange membrane, a catalytic layer and a gas diffusion layer. The gas catalyst layer contains a binder, which i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M8/1004
CPCH01M4/8668H01M4/8828H01M8/1004Y02E60/50
Inventor 赵成吉普星彤段宇廷李佳霖
Owner JILIN UNIV
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