US 12,261,305 B2
Method for preparing highly stable catalyst coating slurry for fuel cells
Mingquan Zhao, Guangdong (CN); Shanyun Mo, Guangdong (CN); Jiaqiang Zhong, Guangdong (CN); Yunsong Yang, Guangdong (CN); Siyu Ye, Guangdong (CN); Yuquan Zou, Guangdong (CN); Junke Tang, Guangdong (CN); Dennis Sun, Guangdong (CN); and Tom Wu, Guangdong (CN)
Assigned to SINOHYKEY TECHNOLOGY GUANGZHOU CO. LTD., Guangzhou (CN)
Filed by SINOHYKEY TECHNOLOGY GUANGZHOU CO. LTD., Guangzhou (CN)
Filed on Feb. 17, 2022, as Appl. No. 17/674,780.
Application 17/674,780 is a continuation of application No. PCT/CN2021/112605, filed on Aug. 13, 2021.
Claims priority of application No. 202011453516.3 (CN), filed on Dec. 11, 2020.
Prior Publication US 2022/0190353 A1, Jun. 16, 2022
Int. Cl. H01M 4/88 (2006.01); H01M 4/92 (2006.01)
CPC H01M 4/8828 (2013.01) [H01M 4/92 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for preparing catalyst coating slurry for fuel cells, comprising at least two mixing and dispersing steps of which a first mixing and dispersing step is carried out to mix and disperse a catalyst, a perfluorosulfonic acid resin and a solvent to obtain a first-stage mixed dispersion, and the other mixing and dispersing steps being carried out to mix and disperse a previous-stage mixed dispersion and newly added perfluorosulfonic acid resin, wherein at least one of the mixing and dispersing steps has a surfactant added for mixing and dispersing;
wherein among two adjacent mixing and dispersing steps, a dispersion strength of the latter mixing and dispersing step is less than a dispersion strength of the former mixing and dispersing step.