LASER-SURFACE-TREATED SEPARATOR PLATE, METHOD FOR PRODUCING SAME, AND METHODS FOR CHARACTERIZING SAME

A metal separator plate for an electrochemical system, having at least a first laser-surface-treated region with a first passivation layer and a second region with a native or reconstructed passivation layer, wherein, as a result of the laser surface treatment, the first passivation layer has: a charge carrier density that is increased by at least 10%, and a surface area that is no more than 5% larger in relation to the native or reconstructed passivation layer. The present disclosure further relates to methods for producing and characterizing such a separator plate.