Sumitomo Electric Toyama Co., Ltd.

Seiji Mabuchi

Junichi Nishimura

Hitoshi Tsuchida

A metal porous material according to an aspect of the present disclosure is a metal porous material in sheet form that includes a frame having a three-dimensional network configuration, wherein the frame includes an alloy including at least nickel (Ni) and chromium (Cr), the frameis a solid solution with iron (Fe), the frame includes a chromium oxide (CrO) layer as an outermost layer and includes a chromium carbide layer located under the chromium oxide layer, the chromium oxide layer has a thickness not less than 0.1 &#x3bc;m and not more than 3 &#x3bc;m, and the chromium carbide layer has a thickness not less than 0.1 &#x3bc;m and not more than 1 &#x3bc;m.

Metal porous material, fuel cell, and method of producing metal porous material

A fuel cell according to the present disclosure includes a flat plate-shaped metal porous body having a framework of a three-dimensional network structure as a gas diffusion layer. The framework is made of metal or alloy. In the metal porous body, a ratio of an average pore diameter in a direction parallel to a gas flow direction to an average pore diameter in a direction perpendicular to the gas flow direction is greater than or equal to 1.4 and less than or equal to 2.5.

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Imizu, Japan

Seiji Mabuchi