TY  - JOUR
AU  - Yan, Yulin
AU  - Fang, Qingping
AU  - Blum, Ludger
AU  - Lehnert, Werner
TI  - Performance and Degradation of a SOEC Stack with Different Cell Components
JO  - Electrochimica acta
VL  - 258
SN  - 0013-4686
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2017-07704
SP  - 1254 - 1261
PY  - 2017
AB  - High temperature water electrolysis with solid oxide electrolysis cells (SOECs) is a promising method for hydrogen production. In order to study the performance and degradation behavior of cells with different cell components in electrolysis mode, a four-cell stack was assembled that used JÜLICH's F10 design with two types of air electrodes based on La0.6Sr0.4CoO3−δ (LSC) and La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF). A PVD-prepared GDC layer was applied to LSCF cells while a screen-printing GDC layer was used in the LSC cells. The performance of the stack was first characterized with IV-curve measurements in both SOFC and SOEC modes within the temperature range of 700–800 °C. The durability of the stack was investigated by conducting a long-term stationary electrolysis operation with a constant current density of −0.5 Acm−2 and steam conversion rate of 50% at 800 °C. Electrochemical Impedance Spectroscopy (EIS) was used to study the electrochemical performance of the stack, as well as the degradation behavior during long-term electrolysis operation. The method “Distribution of Relaxation Times” (DRT) was applied for the further analysis of the EIS data, and the DRT results have successfully supported the stack degradation analysis.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000418324800138
DO  - DOI:10.1016/j.electacta.2017.11.180
UR  - https://juser.fz-juelich.de/record/840145
ER  -