Low nickel containing ceria-based anodes for solid oxide fuel cells

Abstract

Ni-SDC (samaria-doped ceria) cermet was prepared by changing SDC particle size and Ni content, and I-V and AC impedance measurement were conducted to evaluate the electrochemical processes that influence the performance of the anode. It was found that large SDC particles were effective in reducing ohmic overpotential even with low Ni content, and that the conductivity change in the anode with Ni content can be explained by percolation theory.