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Preparation method for anti-settling fuel cell catalyst slurry

A catalyst slurry, fuel cell technology, applied in chemical instruments and methods, mixing methods, chemical/physical processes, etc., to achieve the effect of high consistency and high stability of the slurry

Inactive Publication Date: 2020-05-12
上海亮仓能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As described in patent CN201711397976.7, the glue and powder slurry are stirred separately to make lithium battery slurry. First, the production of lithium battery slurry is much less difficult than the production of fuel cell slurry. Secondly, this patent method only describes Different material addition methods, as for the dispersion mixing method, there is not much introduction

Method used

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  • Preparation method for anti-settling fuel cell catalyst slurry
  • Preparation method for anti-settling fuel cell catalyst slurry
  • Preparation method for anti-settling fuel cell catalyst slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Configure Catalyst Slurry A

[0042] Will The monomer solution is dispersed in a mixed solvent by magnetic stirring, and the mixed solvent includes two components of isopropanol and deionized water, and placed in a vacuumable container and stirred for 24 hours to obtain a dispersed solution; wherein, by mass ratio , Monomer solution: isopropanol: deionized water = (3-10): (33-50): (30-45) preparation.

[0043] Mix 50% Pt / C catalyst with the dispersion solution, vacuumize the container after mixing, start the constant temperature water bath of the ultrasonic disperser, set the temperature at 17°C, the ultrasonic frequency at 25KHz, and the set power at 700W for 30min Ultrasonic dispersion, preliminarily prepared catalyst slurry; wherein, by mass ratio, the catalyst: Monomer solution: isopropanol: deionized water = (9-25): (3-10): (33-50): (30-45) preparation (this embodiment limits the mass ratio of the three to 15:5 :40).

[0044] Use a stator-rotor mixer to car...

Embodiment 2

[0060] Compared with Example 1, most of them are the same, except in this example: Catalyst: Monomer solution: isopropanol: deionized water = 9:10:33:30.

Embodiment 3

[0062] Compared with Example 1, most of them are the same, except in this example: Catalyst: Monomer solution: isopropanol: deionized water = 25:3:50:45.

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Abstract

The invention relates to a preparation method for an anti-settling fuel cell catalyst slurry. The preparation method comprises the following steps: (1) weighing a perfluorosulfonic acid solution, isopropanol and water for mixing, then carrying out sealing, and carrying out magnetic stirring so as to form a dispersion solution; (2) mixing a catalyst with the dispersion solution, and carrying out ultrasonic dispersion so as to obtain a primarily dispersed catalyst slurry; (3) continuously carrying out high-shear dispersion on the primarily dispersed catalyst slurry by using a stator and rotor stirrer so as to obtain a secondarily dispersed catalyst slurry; and (4) carrying out homogeneous dispersion on the secondarily dispersed catalyst slurry under a vacuum condition by using a homogenizerso as to obtain a stable catalyst slurry. Compared with the prior art, the fuel cell catalyst slurry prepared by using the preparation method provided by the invention is high in stability and betterin consistency; different types of catalyst slurry can be prepared according to different fuel cell membrane electrode preparation processes; and the fuel cell catalyst slurry provided by the invention is applicable to being used in domestic fuel cell stacks.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalyst slurry preparation, and relates to a preparation method of anti-sedimentation fuel cell catalyst slurry. Background technique [0002] In proton exchange membrane fuel cells, carbon-supported nano-Pt, Pd noble metals or their alloys are generally used as catalysts for the cathode and anode catalyst layers. During the electrochemical process of the cathode of the fuel cell, the oxygen in the air diffuses to the proton exchange membrane through the gas diffusion layer (GDL), and the hydrogen protons generated by the electrochemical reaction at the anode are transferred to the cathode through the proton exchange membrane. After the protons and oxygen meet at the active sites on the surface of the noble metal catalyst, an oxygen reduction reaction (ORR) occurs to generate water, and both reaction substances die out. [0003] Therefore, how to efficiently prepare membrane electrodes, the co...

Claims

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Application Information

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IPC IPC(8): B01F13/10B01F3/12B01F3/08
CPCB01F23/43B01F23/511B01F23/565B01F33/80B01F33/82B01F33/834
Inventor 邵航宇楚天阔刘坦达谷军
Owner 上海亮仓能源科技有限公司
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