Fe-based perovskite oxides SrFe1-xTixO3-delta (SFT, x = 0.00-0.15) are developed as cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Dense single-phase SFT solid solutions are obtained by sintering the samples at 1300 degrees C for 10 h. The SFT materials are chemically compatible with the La0.9Sr0.1Ga0.8Mg0.2O3-delta (LSGM) and Ce0.8Sm0.2O1.9 (SDC) electrolytes at 1000 degrees C for 2 h. The highest electrical conductivity of 72 S cm(-1) at 650 degrees C in air is obtained for the x=0.05 sample. The substitution of Ti for Fe significantly reduces the thermal expansion coefficients (TECs) from 26.5 x 10(-6) K-1 at x = 0.00 to 22.9 x 10(-6) K-1 at x = 0.15 between 30 and 1000 degrees C. Single cells that use SFT as cathodes with x = 0.00, 0.05, 0.10, and 0.15 on a 300 mu m-thick LSGM electrolyte reach the peak power density of 446, 475, 439, and 432 mW cm(-2) at 800 degrees C, respectively. The addition of SDC in x=0.05 cathode significantly enhances the cell performance and reduces the TEC of the SFT-SDC composite cathodes. The Ti-substituted SFT perovskites and SFT-SDC composites can be considered cheaper alternative cathode materials for use in IT-SOFCs. (C) 2014 Elsevier Ltd. All rights reserved.