Oxygen Dissociation and Interfacial Transfer Rate on Performance of SOFCs with Metal-Added (LaSr)(CoFe)O3-(Ce,Gd)O2 – δ Cathodes

✍ Scribed by T.-J. Huang; C.-L. Chou

• Book ID: 102217052
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 317 KB
• Volume: 10
• Category: Article
• ISSN: 1615-6846
• DOI: 10.1002/fuce.201000028

✦ Synopsis

A solid oxide fuel cell (SOFC) unit is constructed with Ni-Ce 0.9 Gd 0.1 O 2 -d (GDC) as the anode, yttria-stabilised zirconia (YSZ) as the electrolyte and Pt, Ag or Cu-added La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3 -d (LSCF)-GDC as the cathode. The current-voltage measurements are performed at 800 °C. Cu addition leads to best SOFC performance. LSCF-GDC-Cu is better than LSCF-GDC and much better than GDC as the material of the cathode interlayer. Cu content of 2 wt.-% leads to best SOFC performance. A cathode functional layer calcined at 800 °C is better than that calcined at higher tem-perature. Metal addition increases the O 2 dissociation reactivity but results in an interfacial resistance for O transfer. A balance between the rates of O 2 dissociation and interfacial O transfer is needed for best SOFC performance.