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000906613 1001_ $$0P:(DE-Juel1)180786$$aSchwiers, Alexander$$b0$$eCorresponding author$$ufzj
000906613 1112_ $$aCeramics 2022$$conline$$d2022-03-07 - 2022-03-09$$wGermany
000906613 245__ $$aInfluence of dopants on contact resistance in anode-supported solid oxide fuel cells (AS-SOFCs) between doped ceria and YSZ
000906613 260__ $$c2022
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000906613 520__ $$aInfluence of dopants on contact resistance in anode supported solid oxide fuel cells (AS-SOFCs) between doped ceria and YSZAlexander Schwiers, Christian Lenser, Norbert H. MenzlerForschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK),IEK-1: Materials Synthesis and Processing.Wilhelm-Johnen-Straße, 52428 Juelich/GermanyTel.: +49 2461 61-96735a.schwiers@fz-juelich.deAbstractAnode-supported solid oxide fuel cells use Ni/YSZ as anode which makes them unflexible in using biogas due to strong degradation. To improve fuel flexibility, more degradation-tolerant materials have to be implemented. Doped ceria is promising since it shows increased degradation tolerance and higher ionic conductivities in the intermediate temperature regime and some electrochemical activity.However, integration of ceria into a cell is difficult because high sintering temperatures are needed to achieve the necessary microstructure. Implementing ceria between the substrate and electrolyte leads to interdiffusion during sintering and the formation of a Ce1-xZxrO2 phase. In addition to lower conductivity of the mixed phase, the roughening at the interface between anode and electrolyte leads to an increase in polarization resistance of the electrode due to interdiffusion. We investigated the influence of the dopant in X0.1Gd0.9O1.95 (X = Sm, Gd, or Y) on the interdiffusion with 8YSZ. Powder mixtures of YSZ and XDC were prepared and sintered at different temperatures. The interdiffusion behavior was analyzed by XRD and Rietveld refinement. Interdiffusion in layered systems was investigated by SEM analysis. Impedance spectroscopy is used to analyze the influence of the dopant on contact resistance. SDC shows less interdiffusion, Ce1-xZrxO2 formation and a narrower interdiffusion zone. Impedance analysis indicates a different behavior compared to Ni-GDC and Ni-YSZ electrodes.
000906613 536__ $$0G:(DE-HGF)POF4-1231$$a1231 - Electrochemistry for Hydrogen (POF4-123)$$cPOF4-123$$fPOF IV$$x0
000906613 536__ $$0G:(DE-Juel1)SOFC-20140602$$aSOFC - Solid Oxide Fuel Cell (SOFC-20140602)$$cSOFC-20140602$$fSOFC$$x1
000906613 7001_ $$0P:(DE-Juel1)138081$$aLenser, Christian$$b1$$ufzj
000906613 7001_ $$0P:(DE-Juel1)129636$$aMenzler, Norbert H.$$b2$$eLast author$$ufzj
000906613 8564_ $$uhttps://juser.fz-juelich.de/record/906613/files/DopantContactResistanceASSOFC_Ceramics2022_Schwiers.pdf$$yOpenAccess
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