Catalyst sizing agent for preparing catalytic membrane electrode of fuel cell and preparation thereof

A catalyst slurry, fuel cell technology, applied in battery electrodes, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as unsatisfactory catalytic layer performance and influence on gas mass transfer process. , to achieve the effect of improving the gas mass transfer process, increasing the utilization rate, and improving the pore structure

Active Publication Date: 2011-11-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the solution state catalyst slurry, the proton conductor polymer is wrapped on the surface of the catalyst. Due to its insulating properties, the performance of the formed catalytic layer is not ideal, and the gas mass transfer process will be affected

Method used

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  • Catalyst sizing agent for preparing catalytic membrane electrode of fuel cell and preparation thereof
  • Catalyst sizing agent for preparing catalytic membrane electrode of fuel cell and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 50mg of 50wt.% Pt / C electrocatalyst, wet it with 2ml of distilled water, add 2g of isopropanol, and oscillate evenly with ultrasonic to form a uniform feed liquid, then add 5wt.% of Proton conductor polymer 500mg, continue to ultrasonically oscillate for half an hour, add ethylene glycol 250mg during the oscillating process; then weigh 2g of butyl acetate, and add the prepared catalyst slurry to it under ultrasonic oscillating conditions, this After the process is completed, a colloidal catalyst slurry can be formed.

[0029] The proton exchange membrane ( 115) Lay flat on the vacuum heating platform, set the temperature of the heating platform at 80°C, turn on the vacuum pump to make the film firmly adsorb on the platform.

[0030] Spray the above-mentioned catalyst slurry directly on the surface of the membrane. When spraying at the beginning, control the spraying with a relatively small flow rate (0.1-0.2ml / min). When a thin layer of catalyst is formed on th...

Embodiment 2

[0036] The difference from Example 1 is that the electrocatalyst used is a Pt-Pd alloy catalyst.

Embodiment 3

[0038] The difference with example 1 is: the proton exchange membrane adopted is 212 film.

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PUM

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Abstract

The invention relates to a catalyst sizing agent for preparing a catalytic membrane electrode of a proton exchange membrane fuel cell. The catalyst sizing agent consists of an electric catalyst, proton conductor polymer distilled water and an organic solvent. The catalyst sizing agent is controlled in a colloid state, so that the pore structure of a prepared catalytic layer of a catalytic membrane electrode is improved, and the cell performance is enhanced. The conventional sizing agent for preparing the catalytic membrane electrode is in a solution state, so that the utilization ratio of a prepared electrode catalyst is not high, the porosity of a catalytic layer is very low, and the gas diffusion process is suppressed. In the invention, the composition and adding sequence of organic solvents in the sizing agent are changed. A preparation method of the catalyst sizing agent comprises the following steps of: conditioning a solution-state catalyst sizing agent with isopropanol, ethanol, ethanediol and the like; and dropwise adding the formed sizing agent into butyl acetate under ultrasonic oscillation condition to form a colloid-state catalyst sizing agent.

Description

technical field [0001] The invention relates to a catalyst slurry composition for preparing fuel cell catalytic membrane electrodes and a preparation process thereof. Background technique [0002] Proton exchange membrane fuel cell is a power generation device that uses hydrogen as fuel and can effectively convert its chemical energy into electrical energy. Its high energy density, fast start-up speed, low operating temperature, and environmental friendliness determine its It is very suitable as a power source for electric vehicles, a portable small power source, and a power source for underwater power systems. Therefore, since the 1990s, it has been widely concerned by governments of various countries and various aspects such as energy, automobiles, home appliances and military industries, and the technology has developed rapidly. [0003] The key component of proton exchange membrane fuel cell - the electrode part, is the place where the chemical reaction takes place insi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88B01J23/42B01J23/44
CPCY02E60/50
Inventor 俞红梅宋微衣宝廉邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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