A mixed proton, oxygen ion, and electron conducting cathode for SOFCs based on oxide proton conductors

✍ Scribed by Lei Yang; Ze Liu; Shizhong Wang; YongMan Choi; Chendong Zuo; Meilin Liu

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 699 KB
• Volume: 195
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2009.07.057

✦ Synopsis

A composite cathode, consisting of Ba(Zr 0.1 Ce 0.7 Y 0.2 )O 3-ı (BZCY) and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-ı (LSCF), has shown high catalytic activity toward oxygen reduction, demonstrating a peak power density of 855 mW cm -2 at 750 • C. The chemical compatibility between BZCY and LSCF is excellent since there was no evidence of chemical reaction between the two after being fired at 1100 • C for 10 h. The stability of the composite cathode is further shown in single cells operated at 750 and 600 • C for 100 h without observable degradation in performance.