In order to overcome the problems of SOFC anode such as carbon deposition and microstructural change by oxidation, it is desired to develop a reliable substitute for nickel/yttria stabilized zirconia cermet. Several kinds of oxide materials were tested as fuel electrode by means of impedance spectroscopy and steady state polarization measurements. These measurements confirmed that anode performance of Ce0.9Gd0.1O1.95 and Ce 0.992Nb0.008O2 was good in humid hydrogen atmosphere. On the other hand, La0.9Ca0.1Cr 1-xAlxO3 (x=0.2, 0.8), SrZr 0.825Y0.1Ru0.075O3 showed much poorer performance. The reaction kinetics of doped ceria was also investigated and it was revealed that doped ceria has almost the same dependence on gaseous partial pressure and temperature. A possible kinetic equation is proposed, though unclear points still remain.
|Number of pages||7|
|Publication status||Published - 2005|
|Event||9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada|
Duration: 2005 May 15 → 2005 May 20
|Conference||9th International Symposium on Solid Oxide Fuel Cells, SOFC IX|
|Period||05/5/15 → 05/5/20|