Composite metal foil for fuel cell separator, fuel cell separator, fuel cell, and method for producing composite metal foil for fuel cell separator

摘要

A composite metal foil in which the surface of a titanium foil or a titanium alloy foil is coated with a conductive layer, and the surface of the titanium foil or the titanium alloy foil has a TiO 2 in the X-ray diffraction peak of the surface of the titanium foil or the titanium alloy foil. The TiO composition ratio obtained from the maximum intensity (ITO) of the diffraction peak of metal and the maximum intensity (ITi) of the diffraction peak of titanium metal: [ITO / (ITi + ITO)] is 0.5% or more. Is formed, the conductive layer is composed of silver particles having an average particle diameter of 10 nm to 500 nm: 20 to 90% by mass, dispersant: 0.2 to 1.0% by mass, and Remaining part: made of acrylic resin or epoxy resin, thickness: 5 to 50 μm.