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Electrode catalyst slurry, preparation method thereof, catalyst coating film and fuel cell

An electrode catalyst, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problem of catalyst slurry being difficult to ensure uniformity and stability, and achieve high catalyst utilization, stable performance and long service life. Effect

Pending Publication Date: 2022-07-05
中汽创智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above-mentioned technical problems, the present invention provides an electrode catalyst slurry and its preparation method, a catalyst coating film, and a fuel cell. Stability, which solves the problem that it is difficult to ensure the uniformity and stability of catalyst slurry in mass production in the prior art

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  • Electrode catalyst slurry, preparation method thereof, catalyst coating film and fuel cell
  • Electrode catalyst slurry, preparation method thereof, catalyst coating film and fuel cell
  • Electrode catalyst slurry, preparation method thereof, catalyst coating film and fuel cell

Examples

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Effect test

Embodiment 1

[0084] This embodiment provides a preparation method of electrode catalyst slurry, and the preparation method includes the following steps:

[0085] (1) Add catalyst (the average particle size is 8 μm, platinum alloy catalyst platinum-cobalt-carbon with platinum content of 50w% and cobalt content of 5.0w%) into the container, and then introduce argon to exhaust the air, and then add the ionic polymer. The solution (Chemours-D2020, the solid content is 20%), the mass ratio of the ionic polymer to the carbon in the catalyst is 0.8:1, and at room temperature, the frequency is 26HKz ultrasonic vibration stirring for 15min and 20°C cooling and control conditions. 12000r / min high-speed stirring for 30min to obtain the mixture;

[0086] (2) the mixture material is vacuum-dried at 60°C and less than 133Pa for 30min, and the gas after being evacuated is extracted from the vacuum drying box and then condensed and then passed through a vacuum pump to obtain a catalyst-ionic polymer solid...

Embodiment 2

[0089] This embodiment provides a preparation method of electrode catalyst slurry, and the preparation method includes the following steps:

[0090] (1) First, add a catalyst (a platinum alloy catalyst platinum carbon with an average particle size of 5 μm and a platinum content of 50w%) into the container, then pass in argon to exhaust the air, and then add a solution of ionic polymer (AGC-IC100, solid content is 26%), the mass ratio of the ionic polymer and the carbon in the catalyst is 0.6:1, and the frequency is 30HKz ultrasonic vibration stirring for 10min and 10°C cooling, and the control condition is 10000r / min high-speed stirring for 30min, to obtain a mixed material ;

[0091] (2) the mixture material is vacuum-dried at 65°C and less than 133Pa for 30min, and the gas after vacuuming is extracted from the vacuum drying box and then condensed and then passed through a vacuum pump to obtain a catalyst-ionic polymer solid;

[0092] (3) The catalyst-ionic polymer solid bod...

Embodiment 3

[0094] This embodiment provides a preparation method of electrode catalyst slurry, and the preparation method includes the following steps:

[0095] (1) First add 1000g of catalyst (the average particle size is 8 μm, platinum alloy catalyst platinum cobalt carbon with platinum content of 50w% and cobalt content of 5.0w%) into the large container, then pass argon to exhaust the air, and then add ion polymerization solution (AGC-100, solid content 26%), the mass ratio of the ionic polymer to the carbon in the catalyst is 1.5:1, and the frequency is 26HKz ultrasonic agitation for 25min and 22°C cooling, and the control conditions are 30000r / min high-speed stirring for 30 min to obtain a mixture;

[0096] (2) the mixture material is vacuum-dried at 55°C and less than 133Pa for 60min, and the gas after vacuuming is extracted from the vacuum drying box and then condensed and then passed through a vacuum pump to obtain a catalyst-ionic polymer solid;

[0097] (3) the catalyst-ionic...

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Abstract

The invention provides an electrode catalyst slurry, a preparation method thereof, a catalyst coating film and a fuel cell, the preparation method comprises the following steps: (1) mixing a solution of a catalyst and an ionic polymer, and carrying out first stirring to obtain a mixed material; (2) carrying out vacuum drying on the mixed material to obtain a catalyst-ionic polymer solid body; and (3) crushing the catalyst-ionic polymer solid body, mixing the crushed material, an organic solvent and water, and sequentially performing secondary stirring and ball milling to obtain the electrode catalytic slurry. One-time catalyst slurry preparation is changed into two-time catalyst slurry preparation, the catalyst-ionic polymer solid body is prepared in a vacuum drying mode, the space structure of the catalyst and the ionic polymer is locked, the stability of the catalyst slurry is guaranteed during secondary dispersion, and the stability of the ionic polymer is improved. The method is suitable for preparation of large-volume mass-production catalyst slurry.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an electrode catalyst slurry and a preparation method thereof, a catalyst coating film and a fuel cell. Background technique [0002] Fuel cells can convert chemical energy in fuel into electrical energy, and proton exchange membrane fuel cells have the advantages of low operating temperature and high power density. [0003] However, the problem of uneven distribution of ionic polymers and catalysts occurs in the slurry configuration process of the existing fuel cells. The larger the volume of slurry configured in the production process, the more serious the problem of uneven distribution. The part with too much ionic polymer provides supersaturated reactants, hydrogen protons and water, but the catalyst is insufficient, which is prone to problems such as flooding and electrochemical corrosion of carbon support; the part with too little ionic polymer, the catalyst is supersatu...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86
CPCH01M4/88H01M4/8652Y02P70/50
Inventor 张家海王英漆海龙周小草谢晓晓
Owner 中汽创智科技有限公司
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