Layered perovskite oxides have ordered A-cations localizing oxygen vacancies, and may potentially improve oxygen ion diffusivity and surface exchange coefficient. The A-site-ordered layered perovskite PrBa 0.5 Sr 0.5 Co 2 O 5+ı (PBSC) was evaluated as new cathode material for intermediate temperature solid oxide fuel cells (IT-SOFCs). The material was characterized using electrochemical impedance spectroscopy in a symmetrical cell system (PBSC/Ce 0.9 Sm 0.1 O 1.9 (SDC)/PBSC), exhibiting excellent performance in the intermediate temperature range of 500-700 • C. An area-specific-resistance (ASR) of 0.23 cm 2 was achieved at 650 • C for cathode polarization. The low activation energy (Ea) 124 kJ mol -1 is comparable to that of La 0.8 Sr 0.2 CoO 3-ı . A laboratory-scaled SDC-based tri-layer cell of Ni-SDC/SDC/PBSC was tested in intermediate temperature conditions of 550 to 700 • C. A maximum power density of 1045 mW cm -2 was achieved at 700 • C. The interfacial polarization resistance is as low as 0.285, 0.145, 0.09 and 0.05 cm 2 at 550, 600, 650 and 700 • C, respectively. Layered perovskite PBSC shows promising performance as cathode material for IT-SOFCs.