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Batch preparation method of membrane electrode for high mass transfer PEM water electrolysis

A technology of water electrolysis and membrane electrode, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., to achieve the effect of high ion exchange capacity, excellent proton conductivity and good chemical stability

Active Publication Date: 2022-03-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a kind of preparation method of high mass transfer PEM water electrolysis membrane electrode, solve the peroxide free radical to proton exchange in the running process of PEM water electrolysis Chemical degradation of the membrane, and problems with proton conduction in the catalyst layer

Method used

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  • Batch preparation method of membrane electrode for high mass transfer PEM water electrolysis
  • Batch preparation method of membrane electrode for high mass transfer PEM water electrolysis
  • Batch preparation method of membrane electrode for high mass transfer PEM water electrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Slurry configuration: Weigh 0.5 g of Pt nanopowder with a Pt loading of 100%, add 500 g of ethanol solvent, and disperse with ultrasonic stirring at room temperature for 1 hour to obtain catalyst slurry 1 with a content of 0.1%;

[0041] Weigh 0.5 g of iridium nanopowder with 100% iridium loading, add 500 g of ethanol solvent, and disperse with ultrasonic stirring at room temperature for 1 h to obtain catalyst slurry 2 with a content of 0.1%;

[0042] Weigh 5 g of 0.5% of the structure as -OCF 2 CF 2 SO 3 Add 50 g of deionized water to the short side chain perfluorosulfonic acid resin solution of H, and ultrasonically stir at room temperature for 1 hour to obtain binder slurry 3 with dispersed particles having a particle size of 20 nm;

[0043] Weigh 2 g of phosphorylated ceria with a particle diameter of 1 nm, add 198 g of deionized water, and ultrasonically stir at room temperature for 1 hour to obtain functional nanoparticle slurry 4 with a concentration of 0.1...

Embodiment 2

[0049] (1) Slurry configuration:

[0050] Weigh 5g of Pt / C catalyst powder with a Pt loading of 10%, add 95g of isopropanol solvent, and disperse with ultrasonic stirring at room temperature for 24 hours to obtain catalyst slurry 1 with a content of 5%;

[0051] Weigh 5g of iridium / C powder with an iridium loading of 10%, add 95g of isopropanol solvent, and disperse with ultrasonic stirring at room temperature for 24 hours to obtain catalyst slurry 2 with a content of 5%;

[0052] Weigh 5 g of 15% of the structure as -OCF 2 SO 3 Add 50 g of deionized water to the short side chain perfluorosulfonic acid resin solution of H, and ultrasonically stir at room temperature for 24 hours to obtain a binder slurry 3 with a particle size of resin dispersed particles of 200 nm;

[0053] Weigh 6g of sulfonated manganese dioxide with a particle diameter of 10nm, add it to 194g of ethanol, and ultrasonically stir at room temperature for 24 hours to obtain functional nanoparticle slurry 4 w...

Embodiment 3

[0059] (1) Slurry configuration:

[0060] Weigh 2g of Pt / C catalyst powder with a Pt loading of 50%, add 98g of n-propanol solvent, and disperse with ultrasonic stirring at room temperature for 12 hours to obtain catalyst slurry 1 with a content of 2%;

[0061] Weigh 2g of iridium / C powder with 50% iridium loading, add 98g of n-propanol solvent, and disperse with ultrasonic stirring at room temperature for 12h to obtain catalyst slurry 2 with a content of 2%;

[0062] Weigh 5g of 10% of the structure as -OCF 2 CF 2 CF 2 SO 3 Add 50 g of deionized water to the short side chain perfluorosulfonic acid resin solution of H, and ultrasonically stir at room temperature for 12 hours to obtain binder slurry 3 with a particle size of resin dispersed particles of 100 nm;

[0063] Weigh 2g of sulfonated cerium oxide with a particle diameter of 5nm, add it to 98g of n-propanol, and ultrasonically stir at room temperature for 12 hours to obtain functional nanoparticle slurry 4 with a conc...

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Abstract

The invention discloses a preparation method of a PEM water electrolysis membrane electrode, which comprises the following steps: spraying different components of a catalyst layer multi-component composite slurry independently in an ultra-short time by adopting a multi-nozzle type spraying device, and accurately controlling the spraying rate and atomization degree of the different components, so as to prepare the PEM water electrolysis membrane electrode. The problem of poor dispersibility of different catalysts and binders in the catalyst slurry in the same solution is solved; the multi-component composite slurry comprises catalysts with different components, high-conductivity short-side-chain perfluorinated sulfonic acid resin, a high-chemical-stability nano additive and the like, the proton transmission rate of the water electrolysis membrane electrode can be effectively increased, the electrolysis voltage can be reduced, the cost of PEM electrolyzed water is further reduced, and the service life is prolonged; the membrane electrode provided by the invention can be applied to devices such as a PEM water electrolyzer and a PEM water electrolysis hydrogen production system to be used as a proton exchange membrane electrode.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane water electrolysis, in particular to a method for preparing a high mass transfer PEM water electrolysis membrane electrode. Background technique [0002] Hydrogen is regarded as the most ideal energy carrier due to its clean, pollution-free, efficient, storable and transportable advantages. Hydrogen production by electrolysis of water is currently the easiest way to obtain pure hydrogen. If it is combined with renewable resource power generation technologies, such as photovoltaic power generation, hydropower generation and wind power generation, electrolysis of water can be used as a large-scale hydrogen production technology, which will not pollute the environment Small, less greenhouse gas emissions, good economy, has a good application prospect. As the core component of the electrolyzed water system, the electrolyzer's investment and production costs determine the economy and ...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B9/23C25B13/08C25B11/081B05D7/04
CPCC25B1/04C25B9/23C25B13/08C25B11/081B05D7/04B05D7/544Y02E60/36Y02E60/50
Inventor 郝金凯张洪杰邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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