YE Zibin, ZHOU Mingyang, ZOU Gaochang, GU Xiaofeng, WU Qiwen, LIU Jiang
(School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China)

Abstract: Tubular cone-shaped anode-supported segmented-in-series solid oxide fuel cells are prepared by using a water-based gel-casting technique with acrylamide as the monomer. In preparing the green body of the porous cone-shaped anode (NiO-YSZ) support, by using the gel-casting technique, the reaction temperature is set at 90 C, without the requirement of initiator and catalyst. Then, the green anode is prefired at 1200 C. An electrolyte (YSZ) film is coated on outside of the anode support by using dip-coating technique and the bilayer is co-sintered at 1400 ℃. A cathode (Ag-GDC) is applied on the electrolyte by using brush-painting, which is then sintered at 850 ℃. The as-prepared tubular anode-supported cell gives a peak power density of 693mW·cm^-2 at 800 ℃. The segmented-in-series two-cell-stack shows an open circuit voltage of 2.06 V and a peak power of 2.31 W at 800 ℃ with an area of 4.1 cm².
Key words: solid oxide fuel cell; gel-casting technique; cone-shaped segmented-in-series; anode support