Abstract: A solid oxide fuel cell, wherein one of the electrodes of the fuel cell or an electrically conductive carrier, on which this electrode is applied, is designed as stabilizing substrate (1), in which multiple tubular hollows with preferably round, oval and/or square cross sections and with at least one open end are arranged, wherein the hollows are coated with at least an electrolyte (2) and at least the other, second electrode (3) of the fuel cell, and wherein at least one constructional element, hereinafter also denoted as constructional feature, is arranged on or at and/or integrated into the substrate, said constructional element being adapted for the integration of the fuel cell into a reactor.