AbstractThis work evaluates the effects of the sintering temperature (800 °C, 900 °C, 1000 °C) of SrTi_1-xFe_xO_3-δ (x = 0.35, 0.5, 0.7) porous electrodes on their electrochemical performance as potential oxygen electrode materials of solid oxide cells. The materials were prepared by a solid-state reaction method and revealed the expected cubic perovskite structure. After milling, the powders were characterised by a sub-micrometre particle size with high sinter-activity. It was shown that the lowest area specific resistance was achieved after sintering SrTi_0.65Fe_0.35O₃ electrodes at 1000 °C, and SrTi_0.5Fe_0.5O₃ and SrTi_0.30Fe_0.70O₃ electrodes at 800 °C, which can be considered to be a relatively low temperature. In general, EIS measurements showed that increasing the Fe content results in lowered electrode polarisation and a decrease of the series resistance. Even though the studied materials have much lower total conductivities than state-of-the-art electrode materials (e.g. (La,Sr)(Co,Fe)O₃), the polarisation resistances obtained in this work can be considered low.