No abstract

 Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

No abstract

A cell which consists of a porous 18 m thick Y-doped ZrO 2 ͑YSZ͒ electrolyte (23 Ϯ 3 vol % open porosity͒ on a NiO-YSZ anode substrate and a cathode using (La, Sr͒͑Co, Fe͒O 3 has been investigated in the single-chamber configuration. The cell performance and catalytic activity of the anode was measured in a flowing air-methane gas mixture with various flow rates. The results showed that the open-circuit voltage and the power density increased as the gas flow rate increased. The cell generated an open-circuit voltage of about 0.78 V, which was only about 0.1 V lower than that observed with dense electrolyte specimens. A maximum power density of 660 mW cm Ϫ2 ͑0.44 V͒ was obtained at set temperature ϭ 606°C ͑cell temperature ϭ 744°C) in the flow rate of 900 cm 3 min Ϫ1 , where the current efficiency was about 5% determined from fuel consumption.

In this study, yttrium-stabilized zirconia ͑YSZ͒ thin films 1-2 m thick electrolyte have been prepared using NiO-YSZ anode as substrates. Fuel cell test was conducted with the single chamber configuration in methane-air gas mixture using (La,Sr)(Co,Fe)O 3 ͑LSCF͒ as the cathode. Test results showed that the open-circuit voltage to be Ͼ0.8 V, with power density as high as 0.12 W cm Ϫ2 . It was also shown that gas flow rate has a large influence on the performance of the fuel cell, which indicates the importance of the geometrical design for anode support fuel cell system.