80 research outputs found
Impact of Initial Reduction and H<sub>2</sub>/H<sub>2</sub>O Contents on the Performance and Microstructure of Ni Cermets
Infiltrated La0.4Sr0.4Fe0.03Ni0.03Ti0.94O3 based anodes for all ceramic and metal supported solid oxide fuel cells
Financial support by the EU project METSAPP (FP7-278257) and Energinet.dk under the project ForskEL 2012-1-10806 is gratefully acknowledged.For improved robustness, durability and to avoid severe processing challenges alternatives to the Ni:YSZ composite electrode is highly desirable. The Ni:YSZ composite electrode is conventionally used for solid oxide fuel cell and solid oxide electrolysis cell. In the present study we report on high performing nanostructured Ni:CGO electrocatalyst coated A site deficient Lanthanum doped Strontium Titanate (La0.4Sr0.4Fe0.03Ni0.03Ti0.94O3) based anodes. The anodes were incorporated into the co-sintered DTU metal supported solid oxide fuel cell design and large sized 12 cm Ă 12 cm cells were fabricated. The titanate material showed good processing characteristics and surface wetting properties towards the Ni:CGO electrocatalyst coating. The cell performances were evaluated on single cell level (active area 16 cm2) and a power density at 0.7 V and 700 °C of 0.650 Wcmâ2 with a fuel utilization of 31% was achieved. Taking the temperature into account the performances of the studied anodes are among the best reported for redox stable and corrosion resistant alternatives to the conventional Ni:YSZ composite solid oxide cell electrode.Publisher PDFPeer reviewe
Creation of high mobility two-dimensional electron gases via strain induced polarization at an otherwise nonpolar complex oxide interface
The discovery of two-dimensional electron gases (2DEGs) in SrTiO3-based
heterostructures provides new opportunities for nanoelectronics. Herein, we
create a new type of oxide 2DEG by the epitaxial-strain-induced polarization at
an otherwise nonpolar perovskite-type interface of CaZrO3/SrTiO3. Remarkably,
this heterointerface is atomically sharp, and exhibits a high electron mobility
exceeding 60,000 cm2V-1s-1 at low temperatures. The 2DEG carrier density
exhibits a critical dependence on the film thickness, in good agreement with
the polarization induced 2DEG scheme.Comment: 19 pages, 4 figs; Nano Letters,2015, published onlin
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