High performance Ni–Fe alloy supported SOFCs fabricated by low cost tape casting-screen printing-cofiring process

• Metal support SOFC was prepared by tape casting and screen printing technique.
• The cell exhibited excellent performance at low operation temperature.
• There is no significant degradation after five of redox recycles of the cell.

Novel Ni–Fe alloy supported solid oxide fuel cells, with Ni cermet as functional anode, La0.8Sr0.2MnO3 coated Ba0.5Sr0.5Co0.2Fe0.8O3 as cathode and Gd-doped Ce2O3 as electrolyte, are successfully fabricated by the cost effective method of tape casting-screen printing-cofiring. The Ni–Fe porous substrate is obtained by reduction (in H2 at 650 °C for 2 h) of sintered NiO-10 wt% Fe2O3 consisting of NiO and NiFe2O4. The cell is subjected to evaluation in the aspects of electrochemical performance and redox capability at temperatures between 500 and 650 °C. The result shows a peak power density of 1.04 W cm−2 at 650 °C. Furthermore, the metal support cell exhibits excellent tolerance to redox cycles. Five redox recycles for cells are operated at 600 °C, which shows no significant degradation in open circuit voltage and power density.