TY  - CONF
AU  - Tietz, Frank
AU  - Al Daroukh, M.
AU  - Schefold, J.
AU  - Brisse, A.
AU  - The, D. N. M.
AU  - Schroeder, M.
TI  - Investigations on a solid oxide cell after 6100 h operation in electrolysis mode
M1  - FZJ-2014-05465
PY  - 2014
AB  - An electrode-supported solid oxide electrolysis cell (SOEC) was operated for 6100 h with a current density of -0.75 A/cm2 at a temperature of 780 °C indicating high stability and low voltage increase of 11 mV/kh. The cell consisted of a 10 µm thick solid electrolyte (yttria-stabilised zirconia, YSZ) and a diffusion barrier layer of gadolinium- substituted ceria, a Ni/YSZ cermet as hydrogen electrode and as mechanical support, and a La0.58Sr0.4Co0.2Fe0.8O3 perovskite as oxygen electrode. The electrodes as well as the YSZ and CGO layers were deposited on the electrode support by screen printing. Metallographic post-test analyses showed no significant changes in microstructure compared to the initial state. Investigations by means of scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy indicate material transport from the electrolyte into the diffusion barrier layer and pore formation at the hydrogen electrode /electrolyte interface.
T2  - European Hydrogen Energy Conference 2014
CY  - 12 Mar 2014 - 14 Mar 2014, Sevilla (Spain)
Y2  - 12 Mar 2014 - 14 Mar 2014
M2  - Sevilla, Spain
LB  - PUB:(DE-HGF)1
UR  - https://juser.fz-juelich.de/record/171909
ER  -