Method for preparing fuel cell membrane electrode

A fuel cell membrane and electrode technology, applied to battery electrodes, circuits, electrical components, etc., can solve problems such as swelling of proton exchange membranes, achieve the effects of reducing contact resistance, mild reaction conditions, and low production costs

Active Publication Date: 2014-05-07
南京东焱氢能源科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared catalytic layer structure not only retains the advantages of the above-mentioned thin-layer platinum nanowire catalytic layer structure, but also solves the problem of swelling of the proton exchange membrane during the preparation process and has the advantages of simple process, low production cost and good uniformity of the catalytic layer. , Conducive to industrial production and other advantages

Method used

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  • Method for preparing fuel cell membrane electrode
  • Method for preparing fuel cell membrane electrode
  • Method for preparing fuel cell membrane electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Add 1.00 mg of carbon powder and 2.50 mg of Nafion solution (resin alcohol solution with a mass fraction of 10%) into 1 ml of isopropanol solution, ultrasonically treat the solution to uniformly disperse the solution, and then spray it uniformly on PTFE. (PTFE) transfer medium, so that a uniform layer of carbon powder matrix (area 3.3 × 3.3 cm) is formed on the PTFE transfer medium. 2 , the toner load is 0.1mg / cm 2 ), and finally dried at 50°C for 30 minutes.

[0044] (2) Fix the PTFE transfer medium sprayed with the carbon powder matrix in the fixture, and add an aqueous solution containing chloroplatinic acid and formic acid to the fixture, which contains chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) 8.00mg, 1ml of formic acid (88% by mass) and 80ml of water. It was then left to stand at room temperature for 48 hours, i.e. 0.3 mg / cm was deposited on the above-mentioned substrate 2 of platinum. After that, the above solution was replaced, the transfer medium was r...

Embodiment 2

[0049] (1) Add 1.00mg carbon powder and 2.50mg Nafion solution (resin alcohol solution with a mass fraction of 10%) into 1ml isopropanol, ultrasonically treat the mixed solution to uniformly disperse the mixed solution, and then spray it uniformly on the PTFE transfer medium , to form a uniform thin layer of carbon powder on the PTFE transfer medium (area 3.3 × 3.3 cm 2 , the toner load is 0.1mg / cm 2 ), and finally dried at 50°C for 30 minutes.

[0050] (2) Fix the PTFE transfer medium sprayed with the carbon powder matrix in the fixture, and add an aqueous solution containing potassium chloroplatinite and formic acid to the fixture, which contains potassium chloroplatinite (K 2 PtCl 4 ) 7.50mg, 1ml of formic acid (88% by mass) and 80ml of water. It was then left to stand at room temperature for 48 hours, i.e. 0.3 mg / cm was deposited on the above-mentioned substrate 2 of platinum. After that, the above solution was replaced, the transfer medium was repeatedly soaked and r...

Embodiment 3

[0054] (1) Add 1.00mg carbon powder and 2.50mg Nafion solution (10% resin alcohol solution) into 1ml isopropanol solution, ultrasonically treat the solution to uniformly disperse the solution, and then spray it uniformly on the PTFE transfer medium , to form a uniform thin layer of carbon powder on the PTFE transfer medium (area 3.3 × 3.3 cm 2 , the toner load is 0.1mg / cm 2 ), and finally dried at 50°C for 30 minutes.

[0055] (2) Fix the PTFE transfer medium sprayed with the carbon powder matrix in the fixture, and add an aqueous solution containing chloroplatinite and formic acid to the fixture, which contains potassium chloroplatinite (K 2 PtCl 4 ) 7.50mg, 1ml of ascorbic acid (0.4mol / L) and 80ml of water. It was then left to stand at room temperature for 48 hours, i.e. 0.3 mg / cm was deposited on the above-mentioned substrate 2 of platinum. After that, the above solution was replaced, the transfer medium was repeatedly soaked and rinsed with deionized water, and finall...

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Abstract

The invention discloses a method for preparing a fuel cell membrane electrode. The method is characterized by comprising the steps of preparing a layer of carbon powder substrates on a transfer medium, depositing platinum nanowires, then coating a layer of electrolyte resin solution to form a catalyst layer, and transferring the catalyst layer to a proton exchange membrane by using a heat transfer method to obtain a platinum nanowire catalyst layer membrane electrode. Through the method for preparing the fuel cell membrane electrode, a series of problems caused due to swelling of the membrane in the preparation process of the substrates and depositing the platinum nanowires can be well solved. The prepared fuel cell membrane electrode has the beneficial effects of the platinum nanowire catalyst layer, also has the advantages of simple process, low production cost and good catalyst layer uniformity and is conducive to industrial production.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a method for preparing a membrane electrode of a fuel cell. Background technique [0002] A fuel cell is a clean, efficient, long-life power generation device. Compared with conventional power generation technologies, fuel cells have great advantages in terms of efficiency, safety, reliability, flexibility, cleanliness, and operability, and have broad application prospects. As one of the fuel cells, the proton exchange membrane fuel cell also has the advantages of low operating temperature, high specific energy, long service life, fast response speed and no electrolyte leakage. There are good application prospects. The core component of the proton exchange membrane fuel cell is the membrane electrode (Membrane Electrode Assembly, MEA), which is composed of an anode, a cathode and a polymer electrolyte membrane, in which the electrodes (including the anode and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCH01M4/886Y02E60/50
Inventor 隋升苏凯华姚先拥
Owner 南京东焱氢能源科技有限公司
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