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Fuel cell membrane electrode, preparation method thereof and fuel cell

A fuel cell membrane and electrode technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of membrane electrode performance attenuation, achieve the effects of reducing decomposition voltage, prolonging service life, and inhibiting corrosion

Active Publication Date: 2021-10-12
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the performance of the membrane electrode is attenuated due to the reverse pole phenomenon existing in the existing fuel cell, a fuel cell membrane electrode and a preparation method thereof, and a fuel cell membrane electrode are provided.

Method used

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  • Fuel cell membrane electrode, preparation method thereof and fuel cell
  • Fuel cell membrane electrode, preparation method thereof and fuel cell
  • Fuel cell membrane electrode, preparation method thereof and fuel cell

Examples

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preparation example Construction

[0055] Another embodiment of the present invention provides a method for preparing a fuel cell membrane electrode as described above, comprising the following steps:

[0056] The anode catalyst slurry and the cathode catalyst slurry are prepared by dispersing the catalytically active component and the anti-reverse material in a solvent, and the anti-reverse material includes IrO 2 , RuO 2 One or more of , NiO and CoO;

[0057] The anode catalyst slurry and the cathode catalyst slurry are respectively applied to two sides of the proton exchange membrane, and after drying, an anode catalyst layer and a cathode catalyst layer are obtained.

[0058] In some embodiments, before applying the anode catalyst slurry and the cathode catalyst slurry, the proton exchange membrane is soaked in 5% to 10% hydrogen peroxide for 0.5 to 2 hours at a treatment temperature of 60 to 100° C. ~12mol / L sulfuric acid treatment for 0.5~1h, the treatment temperature is 60~80°C, after cleaning, dry at ...

Embodiment 1

[0068] This embodiment is used to illustrate the fuel cell membrane electrode disclosed in the present invention and its preparation method, including the following steps:

[0069] Get the Pt / C catalyst that mass fraction is 40% respectively, add in two beakers respectively, first add a small amount of isopropanol solution in each beaker, stir and dissolve the catalyst, get two other beakers and add isopropanol respectively, Add the perfluorosulfonic acid polymer solution with a mass content of 20% into two beakers, stir ultrasonically, then pour the solution containing the perfluorosulfonic acid polymer into two beakers containing the Pt / C catalyst, and ultrasonically Carry out 60min alternately with stirring and mixing, prepare the homogeneous catalyst slurry of dispersion mixing, weigh IrO 2 Added to the catalyst slurry, ultrasonic and stirring mixed alternately for 60min. In catalyst slurry, Pt / C catalyst: perfluorosulfonic acid polymer: IrO 2 The mass ratio is 2.5:1:1. ...

Embodiment 2

[0072] This example is used to illustrate the fuel cell membrane electrode disclosed in the present invention and its preparation method. Most of the operating steps in Example 1 are different in that:

[0073] In catalyst slurry, Pt / C catalyst: perfluorosulfonic acid polymer: IrO 2 The mass ratio is 2.5:1:0.25.

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Abstract

In order to overcome the problem of performance degradation of a membrane electrode caused by an antipole phenomenon existing in an existing fuel cell, the invention provides a fuel cell membrane electrode which comprises a proton exchange membrane and a catalyst layer, and the catalyst layer comprises an anode catalyst layer and a cathode catalyst layer, the anode catalyst layer and the cathode catalyst layer are respectively arranged on two sides of the proton exchange membrane, the components of the catalyst layer comprise a catalytic active component and an anti-reverse electrode material, and the anti-reverse electrode material comprises one or more of IrO2, RuO2, NiO and CoO. Meanwhile, the invention also discloses a preparation method of the fuel cell membrane electrode and a fuel cell. According to the fuel cell membrane electrode provided by the invention, the corrosion phenomenon of reverse voltage on the carbon carrier in the catalyst layer in the reverse pole process is effectively inhibited, so that the attenuation of the performance of the fuel cell is delayed, and the service life of the fuel cell is prolonged.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell membrane electrode, a preparation method thereof, and a fuel cell. Background technique [0002] Fuel cell vehicles have the advantages of environmental protection, high efficiency, short refueling time and long cruising range, and are an important development direction of new energy vehicles. The electric stack is the core component of a fuel cell vehicle, and the membrane electrode is one of the most important components in the electric stack, which affects the life and performance of the electric stack. [0003] Under the dynamic working condition of the vehicle, there will be frequent start-stop and rapid load change, especially when the load changes greatly, the fuel supply may be insufficient or not timely, causing the stack to be in a "starved" state , Severe lack of gas will cause a single or multiple batteries in the stack to have an extremely...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M4/92H01M8/1004
CPCH01M8/1004H01M4/9041H01M4/9083H01M4/926H01M4/8647Y02E60/50
Inventor 李目武许永亮周飞鲲洪绍景田冬伟袁述
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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