Separator for fuel cell, method for preparing the same, and fuel cell stack comprising the same
OwnerJong-Ki Lee, Ho-Jin Kweon +1inventors
InventorsJong-Ki Lee, Ho-Jin Kweon, Jun-Won Suh
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Abstract
The metal separator for a fuel cell of the present invention includes a metal substrate having reactant flow pathways and an electro-conductive anti-corrosion coating layer. The electro-conductive anti-corrosion coating layer covers the surface of the metal substrate on which the reactant flow pathways are formed. The coating layer may include metal carbides, metal oxides, and metal borides. A metal layer for improving adherence is formed between the surface of the metal substrate on which the reactant flow pathways are formed, and the electro-conductive anti-corrosion coating layer.
Claims24
A separator for a fuel cell comprising:
- a metal substrate having a surface forming reactant flow pathways;
- a metal layer on the surface of the metal substrate on which the reactant flow pathways are formed;
- and
- an electro-conductive anti-corrosion layer on the metal layer, wherein the electro-conductive anti-corrosion coating layer comprises an anti-corrosion material selected from the group consisting of metal carbides, metal oxides, metal borides, and combinations thereof.
A separator for a fuel cell comprising:
- a metal substrate upon which reactant flow pathways are formed and coated with a mixture of a metal and an electro-conductive anti-corrosion material selected from the group consisting of metal carbides, metal oxides, metal borides, and combinations thereof.
A method for making a separator for a fuel cell comprising:
- forming a metal layer on a metal substrate on which reactant flow pathways are formed;
- and
- coating an electro-conductive anti-corrosion material selected from the group consisting of metal carbides, metal oxides, metal borides, and combinations thereof, onto the metal layer using deposition or slurry coating.
A method for making a separator for a fuel cell comprising:
- mixing a metal powder and an electro-conductive anti-corrosion material selected from the group consisting of metal carbides, metal oxides, metal borides, and combinations thereof in an organic solvent, including a binder dissolved therein, to prepare a slurry;
- and
- pouring the slurry into a mold and drying it to form a separator.
Dependencies are inferred from the claim text.