Developing a reduction resistant layer with SrNi0.8Mo0.2O3-δ mixed-oxide for Sm0.2Ce0.8O2-δ based solid oxide fuel cells

Abstract

Generation of Sr-containing electron blocking layer for doped ceria (DCO)-based single-cell, SrNi0.8Mo0.2O3-δ mixed-oxide as an anode precursor has been investigated. This averts partial reduction from Ce+4 to Ce+3 in ceria based Sm0.2Ce0.8O2-δ (SDC) electrolyte as examined by the reaction with NiO and SDC. The XRD analysis reveals that the SrNi0.8Mo0.2O3-δ precursor reacts with SDC to form SrCeO3 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 SrCeO3 fills the closed pores in the SDC electrolyte and tends to accumulate at the anode-electrolyte interface. © 2019 Author(s).