Abstract: Proposed is an automatic spray apparatus including an airbrush and mask transfer mechanism, the apparatus including an airbrush for spraying liquid through a nozzle by using air supplied thereto, an airbrush transfer unit capable of adjusting a relative distance from the airbrush to a liquid spray target while supporting the airbrush, a mask having a hole formed in a shape in which the liquid is applied on a surface of the liquid spray target, and a mask transfer unit installed between the nozzle of the airbrush and the liquid spray target while supporting the mask, wherein the airbrush transfer unit includes a trigger actuator capable of operating a trigger that controls the spraying of the liquid contained in a part of the airbrush. The automatic spray apparatus can be implemented at a relatively low cost to be used when manufacturing an MEA having a small area.

Abstract: The present invention relates to a component including graphene foam and functioning as a flow field and a gas diffusion layer (GDL) for a fuel cell. More particularly, a component functioning as a flow field and a GDL for a fuel cell according to the present invention is made of graphene foam that enhances mass transport and suffers no corrosion under operating conditions of the fuel cell when compared with a conventional flow field, thereby realizing excellent performance and durability. Furthermore, the component functions as the GDL so a thickness of a membrane electrode assembly is reduced thereby improving cell performance significantly.

Abstract: A flow field including graphene foam for a fuel cell. The flow field is made of graphene foam that enhances mass transport and suffers no corrosion under operating conditions of the fuel cell when compared with conventional flow fields. In addition, compressed graphene foam has smaller in-plane pores due to the compression and has more tortuous pathways for flowing reactants, thereby increasing retention time of reactants and accelerating diffusion of reactants into a gas diffusion layer (GDL). Further, large through-plane pores inside the graphene foam transport reactants to entire areas of a catalyst layer, and faster flow velocity compared with the conventional membrane electrode assembly (MEA) is derived from a decreased flow field width due to compression. Therefore, mass transport of reactants and products is enhanced, and performance of the fuel cell is improved at high current density regions.