Characterization of composite SOFC cathodes

• Book ID: 104433601
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 138 KB
• Volume: 2002
• Category: Article
• ISSN: 1464-2859
• DOI: 10.1016/s1464-2859(02)09028-4

✦ Synopsis

The performance of Pt/YSZ and LSM/YSZ composite SOFC electrodes as a function of the electrode composition is investigated experimentally. The qualitative features of the impedance spectra are similar for both cathodes; in particular, in both the electrode performance shows a dome-shaped curve as a function of the electrode composition. Nevertheless, the quantitative aspects are very different; in particular, the electrode performance is much higher for the LSM/YSZ electrode than for Pt/YSZ. Also, the composition which gives the maximum performance and the experimental values of the percolation thresholds are different. The reasons for the discrepancies are analysed and discussed.