A cofuel channel microtubular solid oxide fuel/electrolysis cell

A co-fuel channel microtubular solid oxide fuel/electrolysis cell is successfully fabricated by adding an insulating ceramic connector. The active electrode area of both of the abovementioned cells is approximately 10.73 cm2. Hydrogen-steam mixtures act as either reactants or products in the ceramic tubes. A ring-like anodic current collector is located in the middle of the anode, while silver paste is coated on the cathode as a cathodic current collector. When operating the cells at 750 ℃, 0.6 A cm−2 at 0.6 V and 1.0 A cm−2 at 1.7 V are achieved for the SOFC and SOEC, respectively. By using the co-fuel channel, the power generation of the SOFC is 3.9 W, while the simultaneous power consumption of the SOEC is 18.2 W. After 11 h of operation, no microcracks were observed, and the anode-electrolyte interface structure exhibited no Ni agglomeration or active phase loss.