Preparation and Characterization of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)-based Composite Anode for Solid Oxide Electrolysis Cell

La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF) based composite anode with SDC interlayer for solid oxide electrolysis cell was prepared by screen printing technique.Electrochemical performance of the electrode at 800℃ was exam-ined by linear sweep voltammetry(LSV) and electrochemical impedance spectroscopy(EIS) methods.The result of EIS analysis suggestes that the oxidation kinetics of O2-to O2 is controlled by three electrode procedures,including charge transfer at the electrode/interlayer interface,charge transfer at the interlayer/electrolyte interface and oxygen desorption/diffusion.Scanning electron microscope analysis shows that composite anode layer,SDC interlayer and the electrolyte are integrated and well-combined.In terms of anode polarization,LSCF based material exhibites a better application perspective rather than traditional LSM-YSZ composite material for SOEC anode.