1results about How to "Solve the swelling problem" patented technology

This invention belongs to the field of fuel cell technology, and particularly relates to a catalyst slurry spraying process and a method for preparing a fuel cell CCM. The spraying path includes an interdigitated serpentine path I and a serpentine path II, both of which include straight paths and turning paths. This invention controls the spraying speed and slurry flow rate during the catalyst layer spraying process, employs an interdigitated serpentine path for spraying, and controls the temperature of the drying platform in zones. This makes the spraying speed of the turning path 1.1-2 times faster than that of the straight path, and the flow rate of the turning path is 0.1-0.9 times that of the straight path. A blank area is left between the two sequentially sprayed straight paths to avoid slurry accumulation during the turning path spraying, thus solving the problem of excessively thick catalyst layer at the catalyst layer edge caused by traditional uniform speed / uniform flow rate spraying.