An electrolysis cell (40), especially for production of an electrochemically activated sodium chloride solution, comprising an anode space (44) provided with an anode and comprising a cathode space (42) which is separated therefrom by a membrane (46) and is provided with a cathode, should enable, in a particularly favourable manner, the production of an electrochemically activated salt solution for which a particularly high bactericidal or antibacterial action, characterized by a high content of free chlorine, coupled with high storage stability is ensured, and the pH should as far as possible allow good combinability with other substances or active ingredients or even be kept adjustable in the manner of a free parameter independently of the other parameters mentioned. For this purpose the anode in accordance with the invention, has a coating (92) comprising ruthenium oxide and iridium oxide on its surface. In a system (1) for production of an electrochemically activated solution with a multitude of such electrolysis cells (40,41), the anode spaces (44) of the electrolysis cells (40,41) are connected in series on the media side, the surface coating (92) of the anode of each electrolysis cell (40,41) being selected in each case as a function of the position of the particular electrolysis cell (40,41) in the series circuit.
