Double perovskite of LaBa0.52Sr0.48Co2O5+δ(LBSC)is investigated as a potential cathode material for intermediate-temperature solid oxide fuel cell(IT-SOFC).The electrical conductivity value of the LBSC oxide indicates gradually decreases with increasing of the temperature from 232 to 178 S cm-1.The activation energies(Ea)of oxygen reduction reaction(ORR)determined from the slope of Arrhenius plots for low-field,high-field and EIS technique are 83.2,76.2 and 102.3 kJ mol-1,respectively.Meanwhile,the activation energy of interfacial resistance for symmetrical cell(LBSC|SDC|LBSC)is 127.3 kJ mol-1.In other part is the improving the cell performance by infiltration methode.The activation energi value of interfacial resistance for symmetrical cell exhibits a dramatically decreased to 47.9 k J mol-1.Based on the electrochemical properties,the mixed ionic and electronic conductor(MIEC)of LBSC is a potential cathode for intermediate temperature solid oxide fuel cells(IT-SOFCs)based on a SDC electrolyte.