%0 Conference Paper
%A Tietz, Frank
%A Al Daroukh, M.
%A Schefold, J.
%A Brisse, A.
%A The, D. N. M.
%A Schroeder, M.
%T Investigations on a solid oxide cell after 6100 h operation in electrolysis mode
%M FZJ-2014-05465
%D 2014
%X 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.
%B European Hydrogen Energy Conference 2014
%C 12 Mar 2014 - 14 Mar 2014, Sevilla (Spain)
Y2 12 Mar 2014 - 14 Mar 2014
M2 Sevilla, Spain
%F PUB:(DE-HGF)1
%9 Abstract
%U https://juser.fz-juelich.de/record/171909