Method for preparing bipolar plate for unitized regenerative fuel cell and bipolar plate for unitized regenerative fuel cell prepared by the same

摘要

The present invention relates to a manufacturing method of a metal separator plate for integrated regenerative fuel cell, and more specifically, to a metal separator plate for integrated regenerative fuel cell, and a a manufacturing method of a metal separator plate for integrated regenerative fuel cell, wherein the manufacturing method comprises the steps of: forming, on a main body, a plurality of flow paths of which a channel width is in a range of 0.5~2.0mm and a channel depth is in a range of 0.1~1.0mm, and a plurality of ribs of which a rib width is in a range of 0.5~2.0mm; pre-processing a surface of the main body having a plurality of flow paths and ribs formed thereon; and forming a metal coating layer on the surface of the main body through a metal sputtering process. According to the present invention, provided is the metal separating plate for integrated regenerative fuel cell, wherein dissimilar metals are coated on the surface of the metal separator plate by a physical adsorption method so as to prevent a passive film such as an oxide layer from being formed on the surface of the metal separating plate, inhibit corrosion at a high voltage, prevent decrease in durability of a bipolar plate when the plate is operated for a long time, prevent degradation of performance, and be capable of distributing an uniform flow of fluid not only in a fuel cell mode in which gas fuel is supplied but also in an electrolyzer mode in which liquid fuel is supplied.