I never read anything about a coating, except in the part were Stan draw a resistance layer in his drawings.
But again, not sure if those are the same...
Steve this is exactly what I'm talking about this patent has a sandwich drawing of the fuel cell. Stan never reveals what kind of material he is using as if it was a trade secret. These coatings I believe are ceramics like zirconium or titanium dioxide. These coatings when applied to the stainless operate like a semiconductor. The diode check on my meter lets me know the current is only flowing one way,,with a single beep. Or sometimes a long beep like a capacitor. The capacitor beep will go both directions on an uncoated cell. However once the ceramic material is applied the beep will only go one direction like a diode.
On a separate note have replaced commonly used electrolytes like lye with the very small amounts of titanium dioxide and notice the cell produces gas without heating the water bath on uncoated cells. Cells with coating have no need to use electrolytes at all.
