Catalyst slurry for fuel cell coating and preparation method thereof

[0014] A method for preparing a catalyst slurry for coating a fuel cell. First, 3 g of Pt / C catalyst particles with a Pt content of 60% are added to a container, and then 2.5 g of deionized water is added to make the catalyst particles fully wet, and then sequentially added 5g of Nafion solution with a mass concentration of 20%, 19g of isopropanol and 0.5g of formaldehyde, and then disperse each substance planetary for 30min. The rotation speed of the dispersing equipment is 1000rpm, and the revolution speed is 300rpm, and then disperse for 1.5min using a mixing defoamer , wherein the dispersion linear velocity is 35m / s, and the catalyst slurry is finally prepared.

[0015] The fuel cell coating catalyst slurry prepared by the method of Example 1 was detected, and its solid content was 13.3%, and its viscosity was about 100mPa.s

[0017] A method for preparing a catalyst slurry for coating a fuel cell, first adding 5g of Pt / C catalyst particles with a Pt content of 40% into a container, then adding 30g of deionized water to fully wet the catalyst particles, and then adding 40g of Nafion solution with a mass concentration of 5%, 7g of absolute ethanol and 1g of tert-butanol, and then planetary dispersion of each substance for 2h, wherein the rotation speed of the dispersing equipment is 1500rpm, the revolution speed is 500rpm, and then the shear emulsifier is used to disperse 0.5 min, wherein the dispersion linear velocity is 50m / s, and finally the catalyst slurry is prepared.

[0018] The fuel cell coating catalyst slurry prepared by the method in Example 2 was tested, and its solid content was 8.4%, and its viscosity was about 52 mPa.s.

[0020] A method for preparing a catalyst slurry for coating a fuel cell. First, add 4g of Pt-Co / C catalyst particles with a Pt content of 40% to a container, then add 11g of deionized water to make the catalyst particles fully wet, and then sequentially Add 5g of nafion solution with a mass concentration of 20%, 4g of ethylene glycol and 1g of phenylpropanol, and then planetary disperse each substance for 1.5h. The rotation speed of the dispersing equipment is 1200rpm, and the revolution speed is 600rpm, and then use a mixing and defoaming machine Disperse for 5 minutes, wherein the dispersion line speed is 30 m / s, and finally prepare the catalyst slurry.

[0021] The fuel cell coating catalyst slurry prepared by the method in Example 3 was tested, and its solid content was 20%, and its viscosity was about 420 mPa.s.