Electrochemical performance of Ni _1-xFe _x-Ce _0.8Gd _0.2O _1.9 cermet anodes for solid oxide fuel cells using hydrocarbon fuel

Ni _1-xFe _x bimetallic-based cermet anodes were investigated for hydrocarbon-fueled solid oxide fuel cells. Ni _1-xFe _x-Ce _0.8Gd _0.2O _1.9 cermet anodes were synthesized using a glycine nitrate process, and their electrical conductivity and the amount of carbon deposits were found to decrease with increasing Fe content. The anode polarization resistance for the CH ₄ fuel was significantly reduced by Fe alloying, which was strongly related to the carbon deposition behavior. The maximum power density of the single cell with Ni _0.85Fe _0.15-Ce _0.8Gd _0.2O _1.9 in CH ₄ at 800 °C was 0.27 W/cm ². Fe alloying significantly improved the electrochemical performance of solid oxide fuel cells in CH ₄ fuel by suppressing carbon deposition.