초록 ▼

A carbonaceous multilayer electrode substrate for a fuel cell disclosed herein has elongated holes for feeding reactant gases to the fuel cell. The electrode substrate comprises at least one porous carbonaceous layer having such holes. An electrode substrate of the invention comprises such a porous

A carbonaceous multilayer electrode substrate for a fuel cell disclosed herein has elongated holes for feeding reactant gases to the fuel cell. The electrode substrate comprises at least one porous carbonaceous layer having such holes. An electrode substrate of the invention comprises such a porous layer and a dense layer capable of effecting a function as a separator sheet. An another substrate of the invention comprises a dense layer and two such porous layers on both surfaces of the dense layer. A still another substrate comprises an extended dense layer and two such porous layers on both surfaces of the dense layer.

대표청구항 ▼

A carbonaceous electrode substrate for a fuel cell, comprising: a dense layer having an average bulk density of not less than 1.0 g/cm3 and a specific gas permeability of not more than 0.2 ml/cm. hr. mmAq; a porous layer of a uniformly porous carbonaceous material having an average bulk density of n

A carbonaceous electrode substrate for a fuel cell, comprising: a dense layer having an average bulk density of not less than 1.0 g/cm3 and a specific gas permeability of not more than 0.2 ml/cm. hr. mmAq; a porous layer of a uniformly porous carbonaceous material having an average bulk density of not less than 1.0 g/cm3 and a specific gas permeability; of 0.3-1.0 g/cm3 and a specific gas permeability of not less than 20 ml/cm. hr. mmAq; the thickness of said dense layer being not more than half of the thickness of said electrode substrate; a plurality of holes extending between two parallel sides of said porous layer and parallel to the surface of said electrode substrate, said holes being provided near the center of the thickness direction of said porous layer and having a circular cross section.