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AssigneeSinohykey Technology Guangzhou Co. Ltd.
InventorsMingquan ZHAO, Shanyun MO, Jiaqiang ZHONG, Yunsong YANG, Siyu YE, Yuquan ZOU, Junke TANG, Dennis SUN, Tom WU
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The invention relates to the field of fuel cells, and in particular to a method for preparing highly stable catalyst coating slurry for fuel cells. The method for preparing highly stable catalyst coating slurry for fuel cells, includes at least two mixing and dispersing steps. The first mixing and dispersing step is carried out to mix and disperse the catalyst, perfluorosulfonic acid resin and solvent to obtain a first-stage mixed dispersion, and the other mixing and dispersing steps are carried out to mix and disperse the previous-stage mixed dispersion and the newly added perfluorosulfonic acid resin, wherein at least one mixing and dispersing step has a surfactant is added for mixing and dispersing. The catalyst in the catalyst slurry prepared by the method has good dispersion stability and less sedimentation, and good performance is achieved when the catalyst slurry is applied to membrane electrodes.
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.
The method for preparing catalyst coating slurry for fuel cells according to claim 2, wherein a bead mill, a sand mill, an ultrasonic disintegrator, a homogenizer or an air-jet mill is used for mixing and dispersing in the former mixing and dispersing step, and a bead mill, a sand mill, an ultrasonic disintegrator, a homogenizer, an air-jet mill, a planetary mixer or an electric mixer is used for mixing and dispersing in the latter mixing and dispersing step.
Dependencies are inferred from the claim text.