Anode performance control of micro-tubular SOFC via wet coating method

✍ Scribed by Toshiaki Yamaguchi; Nigel Sammes

• Book ID: 103833214
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 664 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2011.03.125

✦ Synopsis

A cathode-supported micro SOFC was prepared via co-sintering technique of a scandiastabilized zirconia (ScSZ) electrolyte layer and a micro-tubular (La,Sr) x MnO 3Àd (LSM) support, and subsequent deposition of various anode layers by dip-coating method. The micro-tubular SOFCs were electrochemically evaluated in a humidified H 2 (3% H 2 O)

atmosphere. An LSM-Ce 0.9 Gd 0.1 O 1.95 activation layer was also introduced between the cathode tube and the electrolyte layer in order to improve the catalytic activation at the cathode side. The micro SOFCs exhibited a stable open circuit voltage above 1.05 V at 650 C, and the cells with the anode film thicknesses of 8, 30 and 50 mm generated a maximum power density of 36, 49 and 126 mW/cm 2 , respectively. And, the cell with 50 mm thick anode layer showed about 10 times higher exchange current density than the others, which indicates that the anode performance on the cathode-supported micro SOFC was greatly affected by the thickness of the anode coating layer.