TY  - JOUR
AU  - Serra, J. M.
AU  - Büchler, O.
AU  - Meulenberg, W. A.
AU  - Buchkremer, H. P.
TI  - Thin BaCe0.8Gd0.2O3-delta Protonic Electrolytes on porous Ce08Gd0.2O1.9-Ni Substrates
JO  - Journal of the Electrochemical Society
VL  - 154
SN  - 0013-4651
CY  - Pennington, NJ
PB  - Electrochemical Society
M1  - PreJuSER-55694
SP  - B334 - B340
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - Thin proton-conducting electrolytes with 20 mu m thickness and a nominal composition BaCe0.8Gd0.2O3-delta were prepared over porous substrates composed of Ce0.8Gd0.2O1.9 (CGO)-Ni. The fabrication method includes the simultaneous cofiring and solid-state reaction at 1300 degrees C of three screen-printed layers: mixed conducting anode layer, CGO, and an upper-coated BaCO3 layer. The resulting asymmetric membranes with 5 X 5 cm(2) geometry are gastight. The solid-state reaction resulted in the formation of (i) an electrolyte with large (similar to 2-5 mu m) grains and high packing density and (ii) anode layer comprising finely grained BaCe0.8Gd0.2O3-delta and Ni particles with a thickness around 5 mu m. The layer morphology, phase distribution, and lattice composition has been investigated by X-ray diffraction, energy-dispersive spectroscopy scanning electron microscopy, and secondary-ion mass spectrometry. The preparation of the substrate by warm-pressing and tailoring of the porosity and sintering activity are also thoroughly described. DC-electrical conductivity and ac-electrochemical characterization showed that the supported Gd-doped barium cerate electrolyte produced by solid-state reaction has interesting proton-conduction properties for application in solid oxide fuel cells, hydrogen separation, and sensors. (c) 2007 The Electrochemical Society.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000243977500023
DO  - DOI:10.1149/1.2422901
UR  - https://juser.fz-juelich.de/record/55694
ER  -