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000850926 1001_ $$0P:(DE-HGF)0$$aSzász, Julian$$b0
000850926 245__ $$aNature and functionality of La0.58Sr0.4Co0.2Fe0.8O3-delta/Gd0.2Ce0.8O2-delta/Y0.16Zr0.84O2-delta interfaces in SOFCs
000850926 260__ $$aPennington, NJ$$bElectrochemical Soc.$$c2018
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000850926 520__ $$aInterdiffusion phenomena and secondary phase formation at the interface La0.58Sr0.4Co0.2Fe0.8O3-δ (LSCF) / Gd0.2Ce0.8O2-δ (GDC) / Y0.16Zr0.84O2-δ (YSZ) are correlated to linear and non-linear losses in symmetrical and full SOFC cells. FIB/SEM (focussed ion beam / scanning electron microscopy) tomography is applied for determining the local distribution of the primary phases LSCF, GDC, and YSZ and elemental analysis via STEM/EDXS (scanning transmission electron microscopy / energy dispersive X-ray spectroscopy) provides information on the secondary phase SrZrO3 (SZO) and the interdiffusion between GDC and YSZ (ID). This reveals the effect of GDC co-sintering temperature (varied from 1100°C to 1400°C), alongside the sintering of LSCF at 1080°C, on these multi-layered microstructures. Electrochemical impedance spectra on symmetrical cells show that the polarization resistance (ASRcat) of the cathode/electrolyte interface is pronouncedly affected by three orders of magnitude, changing the overall power density of anode supported SOFC single cells at 0.8V by as much as a factor of 20. In conclusion, the chemical composition of the ID has a tremendous impact on the electrochemical efficiency of the investigated LSCF/GDC/YSZ interface, and processing parameters of anode supported cells with LSCF cathode have to be carefully chosen for individual SOFC cell concepts.
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000850926 536__ $$0G:(DE-Juel1)SOFC-20140602$$aSOFC - Solid Oxide Fuel Cell (SOFC-20140602)$$cSOFC-20140602$$fSOFC$$x1
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000850926 7001_ $$0P:(DE-HGF)0$$aWankmüller, Florian$$b1
000850926 7001_ $$0P:(DE-HGF)0$$aWilde, Virginia$$b2
000850926 7001_ $$0P:(DE-HGF)0$$aStörmer, Heike$$b3
000850926 7001_ $$0P:(DE-HGF)0$$aGerthsen, Dagmar$$b4
000850926 7001_ $$0P:(DE-Juel1)129636$$aMenzler, Norbert H.$$b5$$eCorresponding author
000850926 7001_ $$00000-0002-8183-2460$$aIvers-Tiffée, Ellen$$b6
000850926 773__ $$0PERI:(DE-600)2002179-3$$a10.1149/2.0031811jes$$gVol. 165, no. 10, p. F898 - F906$$n10$$pF898 - F906$$tJournal of the Electrochemical Society$$v165$$x1945-7111$$y2018
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