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Membraneless fuel cell catalyst slurry and methods for preparing catalyst slurry and electrode

A catalyst slurry and fuel cell technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of high platinum consumption and poor conductivity, and achieve the effects of simple preparation process, avoiding agglomeration, and convenient operation

Active Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the existing fuel cell membrane electrodes with a large amount of platinum and poor electrical conductivity, and provide a method for preparing fuel cell membrane electrodes by screen printing

Method used

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  • Membraneless fuel cell catalyst slurry and methods for preparing catalyst slurry and electrode

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preparation example Construction

[0031] Preparation of Pt / graphene solid catalyst

[0032] The Pt / graphene solid catalyst used in the present invention can be prepared according to the method disclosed in the literature, such as the document "Co-reduction preparation and characterization of platinum / graphene oxygen reduction electrocatalyst" (Acta Physicochemical Sinica, 2012, 28( 12)). The preparation method of the solid catalyst used in the present invention is as follows, 0.5g graphene is dissolved in 20mL of high-purity water, then add concentration is 100mL of the chloroplatinic acid solution of 30mmol / L, stir and dissolve evenly. Add 0.2 mmol / L NaBH dropwise under high-speed stirring 4 150 mL of the solution was stirred continuously for 60 minutes, and after centrifugal separation, a Pt / graphene solid catalyst was obtained.

Embodiment 1

[0034] Take 10mL of ethanol, 15g of methylcellulose, and 20g of soluble polyaniline into the flask, and stir continuously for 1 hour to obtain a paste slurry; then add 0.15g of Pt / graphene catalyst to the paste slurry under high-speed stirring conditions , and continued to stir for 4 hours to obtain a catalyst slurry of the present invention.

[0035] Cut the carbon paper into a 5cm×10cm rectangle as the substrate, wash the surface 3 times with absolute ethanol, then wash 4 times with deionized water, then dry, and print the catalyst slurry obtained above on the treated substrate 10 times , after every printing 5 times, put it at 50° C. and dry it for 20 minutes, and after printing, put it at 80° C. and dry it for 90 minutes to obtain an electrode assembly of the present invention.

Embodiment 2

[0037] Take 10mL of ethylene glycol and 25g of soluble polythiophene into the flask and mix evenly, then add 20g of ethyl cellulose to the mixture under stirring conditions, and continue stirring for 2 hours to obtain a paste slurry; then under high-speed stirring conditions Add 0.10 g of Pt / graphene catalyst into the pasty slurry, and keep stirring for 6 hours to obtain a catalyst slurry of the present invention.

[0038] Cut the nickel foam into a 5cm×10cm rectangle as the substrate, wash the surface 3 times with absolute ethanol, then wash 4 times with deionized water, then dry, and print the catalyst slurry obtained above on the treated substrate 10 times , after every printing 5 times, put it at 80°C to dry for 5 minutes, and after printing, put it at 120°C to dry for 40 minutes to obtain an electrode assembly of the present invention.

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Abstract

The invention provides membraneless fuel cell catalyst slurry and methods for preparing the catalyst slurry and an electrode. The catalyst slurry comprises a solid catalyst, a dispersing agent, a connecting material and an auxiliary. The preparation method of the catalyst slurry comprises the following steps: stirring and mixing the auxiliary, the connecting material and the dispersing agent to obtain paste type slurry; and then adding the catalyst into the paste type slurry during high-speed stirring, and stirring to obtain the evenly dispersed catalyst slurry. The invention further provides a preparation method of an electrode assembly. The slurry is good in dispersity and high in stability, not only can the catalyst agglomeration phenomenon be avoided, but also the usage amount of precious metal platinum can be reduced, and the catalyst can form a uniform and compact thin membrane on a substrate. The catalyst slurry and electrode assembly preparation methods are simple, convenient to operate, and strong in repeatability, and is suitable for continuous production, and the large-scale popularization and application is facilitated.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a membraneless fuel cell catalyst slurry, a preparation method of the catalyst slurry and an electrode preparation method. Background technique [0002] Fuel cell is known as the fourth generation power generation technology after thermal power, hydropower and nuclear power, and it is of great significance to solve the two major problems of "energy shortage" and "environmental pollution" that the world is currently facing. Compared with the traditional combustion / internal combustion engine process, the fuel cell process has high energy conversion efficiency, is not restricted by the theoretical upper limit of the Carnot cycle, and avoids the pollution problem caused by the combustion process. It is an efficient and clean "low-carbon economy" from fossil energy "An important part of the transition. Fuel cells are large enough to be used as distributed energy to supply power fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88
CPCH01M4/8835H01M4/8882H01M4/92H01M4/926Y02E60/50
Inventor 王红涛张胜中徐宏王海波
Owner CHINA PETROLEUM & CHEM CORP
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