Honda Motor Co., Ltd.

Natsuki Anzai

Shuhei Goto

Hiroyuki Tanaka

Masaaki Sakano

Teruyuki Ohtani

Masao Utsunomiya

Daisuke Okonogi

Kazuo Nunokawa

To provide a metal separator for fuel cells that can equalize the wet environment of a membrane electrode assembly and a manufacturing method thereof. A metal separator for fuel cells and a manufacturing method thereof are characterized in that, a first separator () made of metal, which is layered in a membrane electrode assembly () to which a pair of electrodes is provided on both sides of a solid polymer electrolyte membrane (), is formed into a corrugated sheet shape having convex parts and concaved parts, a noble metal thin film () is formed on a convex part () of the first separator (), and holes () through which the first separator () is exposed are formed in the noble metal thin film ().

Metal separator for fuel cells and manufacturing method thereof

Auxiliary seals are provided on a surface of a first metal separator, between load receivers and an oxygen-containing gas supply passage, a fuel gas supply passage, an oxygen-containing gas discharge passage, and a fuel gas discharge passage, in relatively wide areas. The cross sectional shape of the auxiliary seal is the same as those of a flow field seal and ring-like seals, and the auxiliary seals are formed independently from the flow field seal and the ring-like seals.

Fuel cell exhibiting enhanced separator sealing structure

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Saitama, Japan

Natsuki Anzai