Nafion is recognized as a key material in the construction of hydrogen fuel cells, specifically serving as a proton exchange membrane and separator. While the original inquiry focused on building a hydrogen cell with Nafion, the discussion highlights its established use in fuel cell applications. One participant shared their success in creating a hydrogen fuel cell using platinum-coated nickel wire, indicating alternative methods for fuel cell construction. For additional resources, a link to a relevant site on fuel cells was provided for further exploration.