Fuel cell separator and fuel cell device
AssigneesToyota Jidosha Kabushiki Kaisha, Tokyo University of Science Foundation
InventorsSatoshi Takata, Masayuki Itagaki
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Abstract
An object of the present disclosure is to provide a fuel cell separator having a low contact resistance due to a tin oxide film and having an excellent corrosion resistance. An embodiment is a method for manufacturing a fuel cell separator including a stainless steel substrate. The method includes forming the tin oxide film on a surface of the stainless steel substrate; and attaching phosphoric acid or phosphate to at least a defective portion in the tin oxide film.
Claims9
A method for manufacturing a fuel cell separator including a stainless steel substrate, comprising:
- forming a tin oxide film on a surface of the stainless steel substrate, the tin oxide film comprising a defective portion;
- exposing the stainless steel substrate having the at least the defective portion of the tin oxide film to phosphoric acid or phosphate by immersion in a solution or spraying with the solution, the solution containing the phosphoric acid or the phosphate;
- and
- attaching phosphoric acid or phosphate to at least the defective portion in the tin oxide film, forming the fuel cell separator.
A fuel cell separator comprising:
- a stainless steel substrate and;
- a tin oxide film formed on a surface of the stainless steel substrate, wherein phosphoric acid or phosphate attaches to a defective portion in the tin oxide film by immersion of the defective portion in or spraying the defective portion with a solution containing phosphoric acid or phosphate.
Dependencies are inferred from the claim text.