Single-element all-perovskite solid oxide fuel cells (SOFCs) incorporating (La,Sr)(Ga,Mg)O-3 (LSGM) electrolyte, (La,Sr)(Ga,Mn)O-3 (LSGMn) anode, and (La,Sr)CoO3 (LSC) cathode were fabricated by a combination of dry pressing and screen printing. Deleterious effects due to interfacial reactions between electrolytes and anodes or cathodes were not found. Furthermore, an increase of SOFC conductivity was observed due to interdiffusion between electrolytes and electrodes. The maximum power density of the single-element all-perovskite SOFC cell was determined to be 250 and 350 mW/cm(2), respectively, at 700 and 800 degrees C under test conditions with H-2 at the anode side and O-2 at the cathode. (c) 2006 The Electrochemical Society.