Four single cell rSOC tests were conducted to investigate the effect of current density, steam content and degree of utilization both upon galvanostatic SOFC and SOEC testing, and load cycling operation. Long-term degradation tests were performed at 700°C during constant galvanostatic SOFC (250 h) and SOEC (250 h) conditions followed by load cycling operation (up to 1000 h) in cycles of 16 h SOFC and 8 h SOEC. Applied current densities were 0.6 A/cm2 and -1.2 A/cm2; and 0.4 A/cm2 and -0.6 A/cm2; inlet gas composition i.e. p(H2O)/p(H2) of 90/10 and dry H2, as well as a test applying p(H2O)/p(H2) of 50/50 for both modes. Furthermore, two different utilization degrees (80% and 40%) were applied. From these tests it is evident that the high current density is detrimental for the fuel electrode durability while high p(H2O) does not seem problematic and cells sustained mechanical integrity upon load cycling.
|Number of pages||14|
|Publication status||Published - 2021|
|Event||17th International Symposium on Solid Oxide Fuel Cells - Stockholm, Sweden|
Duration: 18 Jul 2021 → 23 Jul 2021
Conference number: 17
|Conference||17th International Symposium on Solid Oxide Fuel Cells|
|Period||18/07/2021 → 23/07/2021|