Solid oxide fuel cell
AssigneesMitsubishi Materials Corporation, The Kansai Electric Power Co., Inc.
InventorTakashi Yamada
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Abstract
A solid oxide fuel cell of long lifetime in which good electric conductivity can be maintained between power generation cells even after long time use. A protective plate (20) composed of Ni or Cu is bonded to a side of a metal separator (8) on the side of a fuel electrode layer (3) by diffusion bonding. Since a fuel gas does not intrude into the joint of the both members and Ni and Cu are significantly excellent in high temperature oxidation resistance, the separator (8) is surely protected from the fuel electrode atmosphere and growth of a high temperature oxidation coating is blocked. Consequently, excellent electric conductivity can be maintained when the fuel cell is used for a long time.
Claims5
A flat plate stacked type solid oxide fuel cell having a solid electrolyte layer, a fuel electrode layer arranged on one surface of the solid electrolyte layer, an oxidant electrode layer arranged on the other surface of the solid electrolyte layer, and a metal separator arranged on the outside of each of the fuel electrode layer and the oxidant electrode layer,
- wherein a protective plate, which has more excellent high temperature oxidation resistance as compared with the metal separator, is joined to the surface on the fuel electrode layer side of the metal separator.
Dependencies are inferred from the claim text.