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

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...

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

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