Novel layered perovskite oxide PrBaCuCoO5+δ as a potential cathode for intermediate-temperature solid oxide fuel cells

✍ Scribed by Ling Zhao; Qiong Nian; Beibei He; Bin Lin; Hanping Ding; Songlin Wang; Ranran Peng; Guangyao Meng; Xingqin Liu

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 604 KB
• Volume: 195
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2009.08.009

✦ Synopsis

A novel layered perovskite oxide PrBaCuCoO 5+ı (PBCCO) is employed as a potential cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Thermal expansion and electrochemical performance on samarium-doped ceria (SDC) electrolyte are evaluated. The thermal expansion coefficient (TEC) of PrBaCuCoO 5+ı (PBCCO) is close to that of SDC electrolyte and electrical conductivity of PrBaCuCoO 5+ı (PBCCO) reaches the general required value of cathode material. Symmetrical electrochemical cell with the configuration of PrBaCuCoO 5+ı (PBCCO)/SDC/PrBaCuCoO 5+ı (PBCCO) applied for the impedance studies, the area specific resistance of PrBaCuCoO 5+ı (PBCCO) cathode is as low as 0.047 cm 2 at 700 • C. A maximum power density of 791 mW cm -2 is obtained at 700 • C for the single cell consisting of PrBaCuCoO 5+ı (PBCCO)/SDC/NiO-SDC. Preliminary results indicate that PrBaCuCoO 5+ı (PBCCO) is especially promising as a cathode for IT-SOFCs.