Fixed oxide fuel cell

摘要

A fixed oxide fuel cell includes: a plurality of separators each having first and second opening portions, the separators being stacked such that a membrane electrode assembly is interposed between the separators and that the first opening portions are aligned coaxially in communication with each other to constitute a fuel gas manifold while the second opening portions are aligned coaxially in communication with each other to constitute an oxidant gas manifold, fuel gas and oxidant gas being supplied to the membrane electrode assembly via the fuel gas and oxidant gas manifolds; and silver plate layers provided between the separators for sealing joints in the fuel gas and oxidant gas manifolds.

主权项

1. A fixed oxide fuel cell comprising:
a plurality of membrane electrode assemblies; a plurality of separators each having first and second opening portions, the respective separators separating the membrane electrode assemblies from one another, the separators being stacked in such a manner that the membrane electrode assemblies are interposed between the separators and that the first opening portions of the separators are aligned coaxially in communication with each other to thereby constitute a fuel gas manifold while the second opening portions of the separators are aligned coaxially in communication with each other to thereby constitute an oxidant gas manifold, fuel gas and oxidant gas being supplied to the membrane electrode assemblies via the fuel gas and oxidant gas manifolds; silver plate layers provided between the stacked separators for sealing joints in the fuel gas and oxidant gas manifolds, and insulating communication sections provided in individual ones of the fuel gas and oxidant gas manifolds and each disposed between the separators, each of the insulating communication sections having a communicating hole, wherein, in each of the manifolds, the first or second opening portions of the separators are aligned coaxially in communication with each other via the communicating hole of the communication section, and the silver plate layer is provided on each seal surface, facing one of the separators, of the communication section and seals a joint between each seal surface of the insulating communication section and the one of the separators, wherein each of said plurality of separators is of an integrally formed hollow structure, wherein each of said plurality of separators includes a divider which bisects the hollow structure in a direction perpendicular to a direction in which the first and second opening portions of the separators are aligned coaxially, to define oxidant and fuel passages, and wherein, in each of the plurality of separators, at least a portion of the fuel passage vertically overlaps with at least a portion of the oxidant passage, in the direction in which the first and second opening portions of the separators are aligned coaxially.