Developing a reduction resistant layer with SrNi_(0.8)Mo_(0.2)O_(3-δ) mixed-oxide for Sm_(0.2)Ce_(0.8)O_(2-δ) based solid oxide fuel cells

摘要

Generation of Sr-containing electron blocking layer for doped ceria (DCO)-based single-cell, SrNi_(0.8)Mo_(0.2)O_(3-δ) mixed-oxide as an anode precursor has been investigated. This averts partial reduction from Ce~(+4) to Ce~(+3) in ceria based Sm_(0.2)Ce_(0.8)O_(2-δ) (SDC) electrolyte as examined by the reaction with NiO and SDC. The XRD analysis reveals that the SrNi_(0.8)Mo_(0.2)O_(3-δ) precursor reacts with SDC to form SrCeO_3 based electron blocking layer with high oxygen ion conductivity. The characteristics of the electron-blocking interlayer were analyzed by SEM-EDS analysis and it was found that that SrCeO_3 fills the closed pores in the SDC electrolyte and tends to accumulate at the anode-electrolyte interface.