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Preparation method of membrane electrode and preparation method of membrane electrode anode catalytic layer

A membrane electrode and catalytic layer technology, applied in the field of proton exchange membrane fuel cells, can solve the problems of deviation from the life curve, increase the cost and plasticity of fuel cells, etc.

Active Publication Date: 2019-03-08
山东潍氢动力科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] However, there are still some problems in the current research and development of fuel cells, and there are still many technical challenges on the road to commercialization
The most prominent problem is that the fuel cell uses a large amount of precious metal platinum as a catalyst to speed up the power generation process, but this will inevitably increase the cost and plasticity of the fuel cell, making its value gradually deviate from people's life curve

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  • Preparation method of membrane electrode and preparation method of membrane electrode anode catalytic layer
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  • Preparation method of membrane electrode and preparation method of membrane electrode anode catalytic layer

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preparation example Construction

[0089] see figure 1 , figure 1 Disclosed in one embodiment of the present invention, the flow process of the preparation method of membrane electrode (may be aimed at proton exchange membrane fuel cell membrane electrode), please refer to figure 1 , in one embodiment of the present invention, the preparation method of membrane electrode comprises the following steps:

[0090] (1) Prepare the proton exchange membrane with platinum precursor on the surface by ion exchange method: first cut the proton exchange membrane into a size of 2.5×2.5cm, soak it in dilute sulfuric acid and hydrogen peroxide in turn, and then rinse it with distilled water; the proton exchange membrane is Perfluorosulfonic polymer membrane;

[0091] (2) configuring an aqueous solution of a platinum precursor of 5 mmol / L to 100 mmol / L, the platinum precursor being platinum dichlorotetramine;

[0092] (3) Immerse one side of the proton exchange membrane treated in step (1) in the solution obtained in step (...

Embodiment 1

[0129] Example 1: Ru@Pt / C catalyst embedded in the anode catalyst layer

[0130] (1) Preparation of Pt by ion exchange + -Nafion

[0131] (A) Take a Nafion212 proton exchange membrane of 2.5cm×2.5cm, put it into a hydrogen peroxide solution with a concentration of 5% and treat it at 80°C for 3 hours, rinse it with deionized water, and place it in a 0.5M sulfuric acid solution Continue to treat at 80°C for 3 hours, and finally rinse with deionization, and put it into a beaker for storage until use.

[0132] (B) Gently spread the Nafion membrane treated in step (A) on the surface of the 5mM dichlorotetramine platinum solution, make one side of the membrane fully contact the solution, and after standing for 5min, take out the Nafion membrane and clean it to obtain Pt + -Nafion.

[0133] (2) Preparation of Ru / C substrate catalyst layer

[0134] (A) Toner XC-72R pretreatment:

[0135] Add 10g Vulcan XC-72R carbon powder into a 1L beaker, then add 600mL acetone, stir at room te...

Embodiment 2

[0157] Example 2: Pd@Pt / C catalyst embedded in the anode catalyst layer

[0158] Preparation method is except that following points are different, other is with embodiment 1

[0159] (1) Adopt palladium chloride instead of ruthenium trichloride.

[0160] (2) Palladium chloride needs to be dissolved with concentrated hydrochloric acid.

[0161] (3) The hydrogen reduction temperature is 120°C for 3 hours.

[0162] (4) The performance test and characterization of the membrane electrode are the same as the step (7) of Example 1. The single-cell discharge performance of this electrode meter is very excellent. Under the conditions of 100% humidification of the cathode and anode respectively, and the battery temperature is 70°C, the current density at 0.7V voltage can reach 700mAcm -2 .

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Abstract

The invention discloses a preparation method of a membrane electrode and a preparation method of a membrane electrode anode catalytic layer. The preparation method comprises the following steps of immersing one surface of a proton exchange membrane into a platinum precursor / water solution; mixing a carbon carrier metal or a metal oxide with perfluorinated sulfonic acid resin, and after mixing, performing ultrasonic and uniform mixing in an organic solvent to form a black catalyst slurry; putting a prepared anode substrate catalytic layer into an electroplating grinding tool for pulse electrodeposition, introducing saturated nitrogen, and inserting an auxiliary electrode and a reference electrode; and setting the pulse frequency, the conduction and disconnection time and the pulse deposition total time, so as to prepare an anode catalytic layer in-situ embedded core-shell catalyst. By virtue of the preparation method of the membrane electrode, and the preparation method of the membraneelectrode anode catalytic layer provided by the invention, the preparation efficiency, the controllability and the precision of the preparation process are improved, and the cost can be lowered.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to a method for preparing a membrane electrode of a proton exchange membrane fuel cell and a method for preparing an anode catalyst layer of the membrane electrode. Background technique [0002] In the past few decades, people have had great enthusiasm for proton exchange membrane fuel cells, and many countries have invested heavily in their development and made great progress. At present, the proton exchange membrane fuel cell technology is very mature, and some products have been put into the market. [0003] However, there are still some problems in the current research and development of fuel cells, and there are still many technical challenges on the road to commercialization. The most prominent problem is that the fuel cell uses a large amount of precious metal platinum as a catalyst to speed up the power generation process, but this will inevitabl...

Claims

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Application Information

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IPC IPC(8): H01M8/1004H01M4/92
CPCH01M4/921H01M4/926H01M8/1004H01M2008/1095Y02E60/50
Inventor 熊子昂向华徐玉福王令兆
Owner 山东潍氢动力科技有限公司
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