The YBaCo3.2Ga0.8O7+delta (YBCGO) oxide has been developed as new cathode material based on La0.9Sr0.1Ga0.8Mg0.2O3-delta (LSGM) electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The electrical conductivity of YBCGO sample reaches 1.4-2.1 S cm(-1) in the temperature range 650-800 degrees C. The thermal expansion coefficient (TEC) value of YBCGO is 8.6 x 10(-6) K-1 in the range of 30-1000 degrees C. The area specific resistance (ASR) of a YBCGO cathode with LSGM electrolyte is 0.111 Omega cm(2) at 800 degrees C and it decreases to 0.047 Omega cm(2) when PrBaCo2O5+delta (PBCO) is added to form a YBCGO-PBCO composite cathode. Peak power densities of single cells using a pure YBCGO cathode and a YBCGO-PBCO composite cathode are 395 and 531 mW cm(-2) at 800 degrees C, respectively. The results of this study demonstrate that YBCGO can be a promising cathode material for IT-SOFCs. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.