کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1731434 | 1521453 | 2016 | 5 صفحه PDF | دانلود رایگان |
• YSZ electrolyte-supported tubular SOFCs are fabricated.
• Cell performance is evaluated with molten Sb anode and carbon fuel.
• Feasibility of refueling the tubular cell is demonstrated.
Tubular direct carbon SOFCs (solid oxide fuel cells) supported by YSZ (Y2O3 stabilized ZrO2) electrolyte are fabricated by slurry-casting, slurry-dipping and sintering processes with La0.6Sr0.4Co0.2Fe0.8O3-10 mol.% Gd2O3 doped CeO2 (LSCF-10GDC) as the cathode. Their electrochemical performance is examined at temperatures from 700 to 800 °C using molten antimony (Sb) anode and activated carbon fuel. The ohmic resistance of the cell is between 1.01 and 0.37 Ω cm2 mainly originated from the thick YSZ electrolyte (150 μm); the polarization resistance ranges from 0.22 to 0.06 Ω cm2. The maximum power density at 800 °C is 304 mW cm−2 and can be greatly increased by using a thinner and/or more conductive electrolyte. With 1 g activated carbon as the fuel, the cell performance is stable at 200 mW cm−2 at 800 °C for more than 6 h by chemical consumption (oxidization) of the carbon, which reduces the electrochemically formed Sb2O3 to Sb. The cell performance decreases as the fuel is used up and is recovered by refueling.
Journal: Energy - Volume 95, 15 January 2016, Pages 274–278