Anode-supported tubular SOFCs based on BaZr 0.1Ce 0.7Y 0.1Yb 0.1O 3 − δ electrolyte fabricated by dip coating

Abstract

Anode-supported tubular solid oxide fuel cells (SOFCs) based on a proton and oxide ion mixed conductor, BaZr 0.1Ce 0.7Y 0.1Yb 0.1O 3 − 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 cm 2 at 750 and 600 °C, respectively. Typical tubular cells with Ni-BZCYYb anode, BZCYYb electrolyte, and La 0.6Sr 0.4Co 0.2Fe 0.8O 3 − 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.