The La0.8Sr0.2MnO3 perovskite oxide (LSM) electrode was infiltrated with Er2O3 stabilized Bi2O3 (ESB) to improve the cathode performance of intermediate temperature solid oxide fuel cells. ESB infiltration was carried out by dropping the nitrate solution of Bi(NO3)3 and Er(NO3)3 (80:20mol ratio) on the LSM electrode surface prepared on yttria stabilized zirconia by screen-printing technique. The electrode performance of the infiltrated LSM electrode was studied by electrochemical impedance spectroscopy (EIS) analysis in open air. The EIS results showed that the electrode resistance was drastically decreased by the infiltration of Bi(NO3)3–Er(NO3)3 solution into the LSM electrode; the electrode resistance was as low as 2.31Ωcm2 for the infiltration LSM cathode at 600°C, which was compared with ∼380Ωcm2 for the noninfiltrated LSM cathode. The low electrode resistance could be explained by the formation of high oxide ion conductivity Er2O3-doped Bi2O3 on the LSM particles.

La 0.8 Sr 0.2 Co 0.8 Fe 0.2 O 3 (LSCF) nanoparticles are formed in micropores of La0.8Sr0.2MnO2(LSM)-yttria stabilized zirconia (YSZ) cathodes by reaction-infiltration method. Bismuth nitrate is added in the precursor nitrate solution for LSCF as the reaction promoter. The LSCF phase is observed at 600°C by the addition of bismuth nitrate, and about 100nm particle size LSCF(Bi) is homogenously distributed on the LSM-YSZ surface. The electrode impedance of LSM-YSZ/YSZ/LSM-YSZ cells is examined and has found that the electrode polarization resistance is extremely reduced by the LSCF(Bi) infiltration in LSM-YSZ. The performance of the anode support fuel cell of Ni-YSZ/YSZ/LSM-YSZ is examined at 700°C. The LSCF(Bi) infiltrated LSM-YSZ cathode significantly enhanced the cell performance with a 97%H2-3%H2 fuel at 700°C. The maximum power density of 0.35W∕cm2 is attended.