Anode-supported tubular SOFCs based on BaZr0.1Ce0.7Y0.1Yb0.1O3 − δ electrolyte fabricated by dip coating

Anode-supported tubular solid oxide fuel cells (SOFCs) based on a proton and oxide ion mixed conductor, BaZr0.1Ce0.7Y0.1Yb0.1O3 − δ (BZCYYb), have been fabricated using a dip coating and co-firing process. This new fabrication technique effectively reduced the Ohmic resistances of tubular cells to ~ 0.1 and ~ 0.3 Ω cm2 at 750 and 600 °C, respectively. Typical tubular cells with Ni-BZCYYb anode, BZCYYb electrolyte, and La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF)-BZCYYb composite cathode demonstrated much-improved performance, achieving peak power densities of 1.13, 0.81, 0.63, and 0.53 W cm− 2 at 750, 700, 650, and 600 °C, respectively, when humidified (3 v% water vapor) hydrogen was used as fuel and ambient air as oxidant.

Research highlights
► Using dip coating method fabricated tubular SOFCs based on BZCYYb electrolyte.
► Ohmic resistance is 0.1 and 0.3 Ω cm2 at 750 and 600 °C, respectively.
► Peak power density is 1.13 and 0.53 W cm− 2 at 750 and 600 °C, respectively.