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Fuel-cell catalyst slurry and preparation method thereof

A catalyst slurry, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as limited stability and complex preparation procedures, and achieve the effects of good uniformity, easy operation and improved efficiency

Active Publication Date: 2012-10-03
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In the above-mentioned methods, the prepared catalyst slurry has a certain stability, but the preparation process is complicated or the stability is limited, which cannot meet the requirements for the catalyst performance to be effectively exerted.

Method used

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  • Fuel-cell catalyst slurry and preparation method thereof
  • Fuel-cell catalyst slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 1 g of polyvinylpyrrolidone (PVP) and 10 g of water, add them into a beaker, stir magnetically at room temperature for 0.5 h, and mix evenly to obtain a solution of a polymer dispersant.

[0032] Take 10ml of ethanol and 10ml of deionized water, add them into a beaker, stir magnetically at room temperature for 0.5h, and mix well to obtain a 1:1 ethanol / water mixed solution.

[0033] Take 0.1g of Pt black produced by Johnson Matthy (Jonhson Matthy), add 0.11g of perfluorosulfonic acid (10%Nafion, Dupont), stir magnetically for 5min, and add 2ml of the above-mentioned 1:1 ethanol / water mixed solution , magnetically stirred for 30 min. Finally, 0.03 g of the above-mentioned polymer dispersant solution was added while stirring; the stirring was continued for 1.5 h until the mixture was evenly mixed to obtain a catalyst slurry of the present invention.

Embodiment 2

[0035] Take 1 g of sodium carboxymethyl cellulose (CMC) and 10 g of water, add them to a beaker, stir magnetically at room temperature for 0.5 h, and mix well to obtain a solution of polymer dispersant.

[0036] Take 10ml of ethylene glycol and 10ml of deionized water, add them into a beaker, stir magnetically at room temperature for 0.5h, and mix well to obtain a 1:1 ethanol / water mixed solution.

[0037] Take 0.1g platinum ruthenium-black (Pt-Ru Black) produced by Johnson Matthy (Jonhson Matthy), add 0.08g Nafion (10%Nafion, Dupont), stir magnetically for 5min, add the above-mentioned 1:1 ethanol and Mixed solution of water 1.5ml, magnetically stirred for 30min. Finally, 0.05 g of the above-mentioned high molecular polymer dispersant solution was added while stirring, and the stirring was continued for 2 hours until the mixture was evenly mixed to obtain a catalyst slurry of the present invention.

Embodiment 3

[0039] Take 1.2 g of polyvinyl alcohol (PVA) and 10 g of water, add them into a beaker, stir magnetically at room temperature for 0.5 h, and mix well to obtain a solution of a polymer dispersant.

[0040] Take 10ml of propanol and 10ml of deionized water, put them into a beaker, stir magnetically at room temperature for 0.5h, and mix well to get a 1:1 ethanol / water mixed solution.

[0041] Take 0.1g Pt-Black (Pt-Black) produced by Johnson Matthey, add 0.15g Nafion, stir magnetically for 5min, add 2.5ml of the above 1:1 mixed solution of ethanol and water, stir magnetically for 30min. Finally, 0.02 g of the above-mentioned polymer dispersant solution was added while stirring, and the stirring was continued for 5 hours until the mixture was evenly mixed to obtain a catalyst slurry of the present invention.

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Abstract

The invention relates to fuel-cell catalyst slurry and a preparation method thereof. The catalyst slurry comprises the following raw materials in percentage by weight: 1-40% of solid particle catalyst, 0.1-30% of high polymer proton conductor, 1-60% of water, 1-60% of low-grade alcohol with C1-4, and 0.1-30% of high polymer dispersant, wherein the high polymer dispersant is one or a mixture including more than any two of polyvinylpyrrolidone, polyvinyl alcohol, sodium carboxymethylcellulose, polyoxyethylene and polyacrylamide. The preparation method of the slurry is simple to operate, the slurry has the characteristics of high dispersity and high stability by adding high polymers into the catalyst slurry, a catalytic layer prepared from the slurry is good in uniformity, and an electrode prepared from the slurry has a better discharge performance. The slurry is suitable for spray coating, brush coating, blade coating, screen printing and other numerous mechanical manners for automated production of electrodes. The advantages of high efficiency, time saving and labor saving are achieved.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a catalyst slurry for fuel cells and a preparation method thereof. Background technique [0002] Membrane electrode (MEA) is a key component of fuel cells and a key factor in determining cell performance. The catalyst coating on the membrane electrode (hereinafter referred to as the catalytic layer) is formed by dispersing the catalyst into the solution to form a catalyst slurry, and then coating it on the membrane or carbon paper by various methods. Therefore, the state of the catalyst slurry (such as dispersibility and coatability) directly affects the performance of the membrane electrode, and ultimately affects the performance of the fuel cell. [0003] In the catalytic layer on the fuel cell membrane electrode, only the area where the catalyst forms a stable three-item interface (ie, reaction gas conduction path, electron conduction path, and proton conduction path) ca...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 王丽娜王涛张伟张新荣刘向孙毅蒋永伟
Owner SHANGHAI INST OF SPACE POWER SOURCES
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