화학공학소재연구정보센터
Solid State Ionics, Vol.319, 22-27, 2018
Pd-doped La0.6Sr0.4CoO2Fe0.8O3-delta perovskite oxides as cathodes for intermediate temperature solid oxide fuel cells
The effects of palladium doping on the catalytic activity of La0.6Sr0.4Co0.2Fe0.8O3-delta(LSCF) cathodes are investigated by comparing the performance of La(0.6)Sr(0.4)Co(0.2)Fe(0.8-x)PdxO(3-delta) (LSCFPd) cathodes with different doping content and LSCF cathodes. The electrochemical results show that Pd doping decreases the polarization resistance and promotes the catalytic activity of LSCF cathodes. This promotion becomes greater with the increase of Pd doping content, which is also reflected by electrical conductivity relaxation (ECR) measurement results because the oxygen surface exchange coefficient of LSCFPd is improved by Pd doping. According to the in-situ high temperature XRD and TG-DSC results, perovskite LSCFPd materials are stable at temperature below 700 degrees C, and some Pd species are segregated during heating process.