Catalyzer slurry for producing fuel cell membrane electrode and process for production thereof

Abstract

A catalyst slurry for producing membrane electrode of fuel battery contains 1-40%wt solid catalyst particles, 1-40%wt macromolecule polyester conductor, 0.1-50%wt water, 1-50%wt alcohol, and 1-90%wt organic acid. And the relative preparation comprises that preparing the disperser of macromolecule polyester atom conductor and preparing catalyst slurry. The electrode made from the inventive catalyst slurry has better property than prior art, with easy preparation, saved time, saved force, and low energy consumption.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst slurry for making fuel cell membrane electrodes and a preparation method thereof. Background technique [0002] The catalyst coating on the fuel cell membrane electrode is made by dispersing the solid particle catalyst in a solvent to make a catalyst slurry, and then coating the slurry on the proton exchange membrane, and then drying it to form a membrane. The performance of the catalyst slurry directly affects the performance of the manufactured membrane electrode, and ultimately affects the power generation performance of the fuel cell. [0003] A kind of catalyst slurry is provided in European patent EP 0955687 A2, mainly is that the Nafion alcohol aqueous solution that U.S. Dupont Company produces is added MOH, and H + Form Nafion solution becomes M + Type, then use high boiling point polar solvent to evaporate and replace the Nafion alcohol aqueous ...

AI Technical Summary

Problems solved by technology

If the solution is added to the catalyst alone for stirring and mixing, the catalyst and Nafion in the prepared catalyst slurry cannot be effectively dispersed and combined, which will affect its direct coating on the membrane to prepare CCM fuel cell components, thus affecting the electrode performance of the battery

[0007] Time-consuming, energy-intensive, and cumbersome methods of solvent exchange using Nafion / water-alcohol solutions

Moreover, most of the solvents are organic solvents, which are relatively toxic and require relatively high operating environments.

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