Cu–YSZ cermet solid oxide fuel cell anode prepared by high-temperature sintering

Porous YSZ–Cu alloy cermet structures are prepared by sintering above the metal melting point in reducing atmosphere. Unexpectedly good wetting of the molten metal within the YSZ network is obtained, resulting in cermets with fine structure and excellent electronic conductivity. Anode-supported solid oxide fuel cells are prepared with YSZ–Cu alloy cermet as the anode. Addition of infiltrated ceria catalyst improved the initial performance. Maximum power density of about 275 mA cm−2 and operation for about 110 h was achieved in the 700–800 °C range. After operation, AC impedance revealed that the high-frequency impedance was unchanged, whereas the low-frequency impedance increased. It was concluded that the Cu alloy network conductivity remains high, but catalyst stability needs improvement.