La0.7Ca0.3CrO3 (LCC)-Ce0.8Gd0.2O1.9 (GDC) composites have been investigated as symmetrical electrodes for solid-oxide fuel cells (SOFCs) on La0.9Sr0.1Ga0.8Mg0.2O3-delta (LSGM) electrolyte, where there is no interlayer between anode and electrolyte. LCC oxide is chemically compatible with GDC and LSGM electrolyte at temperatures up to 1200 degrees C. The electrical conductivity of the LCC-GDC composites decreases with increasing GDC content. The best electrical conductivities of 18.64 S cm(-1) in air and 1.86 S cm(-1) in H-2 at 850 degrees C are achieved for an 80 wt% LCC-20 wt% GDC (LCC-GDC20) composite. The thermal expansion coefficients of the LCC-GDC composites increase with increasing GDC content, and are very close to that of the LSGM electrolyte. A cell with a 0.3 mm thick LSGM electrolyte and LCC-GDC20 symmetrical electrodes displays the highest electrochemical performance. The maximum power density is 573 mW cm(-2) in dry H-2 and 333 mW cm-2 in humidified commercial city gas containing H2S at 900 degrees C, respectively. These results suggest that the LCC-GDC20 composite can potentially serve as an electrode for symmetrical SOFCs operated on H-2 and commercial city gas containing H2S. (c) 2010 Elsevier B.V. All rights reserved.