Double-perovskite PrBaCo2/3Fe2/3Cu2/3O5+delta (PBCFC) is synthesized by the EDTA-citrate complexing method, and investigated as a novel cathode material for CeO2-based intermediate-temperature solid-oxide fuel cells (IT-SOFCs). The PBCFC material exhibits good chemical compatibility with Ce0.8Sm0.2O1.9 (SDC) and Ce0.9Gd0.1O1.95 (GDC) electrolytes at 900 and 950 degrees C for 10 h, respectively. XPS analysis shows that the rare-earth and transition-metal cations in the double-perovskite PBCFC exist in two different valence states, i.e., [Pr3+/Pr4+][Ba2+][Co3+/Co4+](2/3)[Fe3+/Fe4+](2/3)[Cu+/Cu2+](2/3)O5+delta. The electrical conductivity of the PBCFC sample reaches a maximum of 144 S cm(-1) at 600 degrees C in air. The thermal expansion coefficient (TEC) of the PBCFC sample is 16.6 x 10(-6) K-1 between 30 and 850 degrees C in air. The polarization resistance of the PBCFC cathode on SDC and GDC electrolytes are 0.144 and 0.038 Omega cm(2) at 800 degrees C, respectively. The maximum power densities of a single cell with the PBCFC cathode on a 300 mu m-thick GDC electrolyte are 659 and 512 mW cm(-2) at 800 and 750 degrees C, respectively. Fe and Cu co-doped PrBaCo2O5+delta exhibits decreased TEC and improved electrochemical performance, making it a suitable cathode material for GDC electrolyte IT-SOFCs. (c) 2013 Elsevier B.V. All rights reserved.