Ce0.8Gd0.2O2-δ protecting layers manufactured by physical vapor deposition for IT-SOFC
Anode-supported Solid Oxide Fuel Cells (SOFCs) built with La0.58Sr0.4Fe0.8Co0.2O3-δ (LSCF) as cathode material exhibit a high electrochemical performance at low temperatures. However, these LSCF perovskites are chemically incompatible with the YSZ electrolyte, reacting to SrZrO3 which acts as an inhibitor for ion conductivity. Therefore, an interlayer between electrolyte and cathode is needed to prevent Sr2+migration towards the electrolyte. Among the materials we could imagine for this purpose, gadolinium doped ceria, e.g. Ce0.8Gd0.2O2-δ(CGO) shows a good performance. The electrochemical performance of these cells depends on the microstructure of the CGO layer. The deposition method plays an important role for the microstructure of the layer. The deposition methods screen printing and physical vapor deposition were compared. Among the physical vapor deposition methods, the magnetron sputtering seems to be the more accurate technology to produce nearly dense layers with efficient Sr2+retention. The correlation between the CGO layer microstructure and the performance of the cell and the Sr2+-retention was studied.
SOFC Magnetron sputtering Thin films Transmission electron microscopy
N.Jordan W.Assenmacher S.Uhlenbruck V.A.C.Haanappel H.P.Buchkremer D.St(o)ver W.Mader
Institute of Energy Research (IEF 1), Forschungszentrum Jülich, Leo-Brand-Str.1, D-52425 Jülich, Ger Inorganic Materials Research Group, University Bonn, Romerstr.164, D-53117 Bonn, Germany
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
919-923
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）