A5026739778- Advancements in Solid Oxide Fuel Cells
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Catalysis and Oxidation Reactions
- Electrocatalysts for Energy Conversion
- Multiferroics and related materials
- Fuel Cells and Related Materials
- Nuclear Physics and Applications
- Catalytic Processes in Materials Science
- Semiconductor materials and devices
- ZnO doping and properties
- Magnetic Field Sensors Techniques
- High-Temperature Coating Behaviors
University of Salerno
2018-2025
Superconducting and other Innovative Materials and Devices Institute
2019-2020
We use resonant inelastic x-ray scattering to probe the propagation of plasmons in electron-doped cuprate superconductor Sr_{0.9}La_{0.1}CuO_{2}. detect a plasmon gap ∼120 meV at two-dimensional Brillouin zone center, indicating that low-energy Sr_{0.9}La_{0.1}CuO_{2} are not strictly acoustic. The dispersion, including gap, is accurately captured by layered t-J-V model calculations. A similar analysis performed on recent data from other cuprates suggests generic and its size related...
Understanding the intricate electrochemical processes in solid oxide fuel cell (SOFC) components, especially air electrodes, is crucial for enhancing device performance and durability. In this work, following recent results showing important improvements of SOFCs with room-temperature sputtered gadolinium-doped ceria (GDC) barrier layers, we investigate by standard Distribution Relaxation Time (DRT) analysis influence GDC thickness uniformity on cathodic reaction kinetics. The outcomes...
We investigate the effects of layer thickness and uniformity in solid oxide fuel cells with Gd0.1Ce0.9O1.95-δ buffer layers deposited by room temperature sputtering followed air annealing. Buffer different (in range 200–400 nm) have been using two configurations resulting coverage thin layers. By comparing electrochemical performances at temperatures sputtered screen printed assembled same short stack, we observed improvements, particularly lower temperatures, all analysed properties...
The use of a doped Ceria buffer layer and Physical Vapour Deposition (PVD) techniques for Solid Oxide Fuel Cells (SOFC) fabrication can limit the former, formation electrical insulating lanthanum, strontium zirconates at cathode/electrolyte interface, whereas latter allows better control materials interfaces. These effects allow operation intermediate temperature ranges. In this work, we study structural properties Gadolinium Doped (GDC) barrier deposited via room RF Sputtering technique on...
We investigate the influence of position, under large circular sputtering targets, on final electrochemical performance 35 mm diameter button solid oxide fuel cells with sputter-deposited Gadolinium doped Ceria barrier layers, positioned in order to almost cover entirety area associated a 120 × 80 mm2 industrial cell. compare results obtained via structural and morphological analysis Electrochemical Impedance Spectroscopy (EIS) measurements performed cells, disentangling role different...
We investigated the influence of a fuel change from pure hydrogen to hydrogen–ammonia mixture at different percentages on electrochemical behavior 50 mm in diameter Solid Oxide Fuel Cells (SOFCs) with sputtered thin buffer layers Gd-doped ceria, varying working temperatures 800 °C 650 °C. The results show that performances cells are not affected by for high (800 and 750 °C). As an example, power density value 802 mW∙cm−2 1 A∙cm−2 is found when directly feeding cell 8 NmL∙min−1cm−2 ammonia...
SrCuO2/Sr0.9La0.1CuO2/SrCuO2 trilayers were grown by oxide-molecular beam epitaxy. The thicknesses of the top and bottom SrCuO2 layers fixed, while thickness infinite-layer electron-doped cuprate Sr0.9La0.1CuO2 central layer was systematically changed. Transmission electron microscopy, x-ray reflectivity diffraction measurements performed to assess sample quality abruptness interfaces. Electrical transport as a function temperature thickness, confirm that normal state properties are altered...
We investigate the ionic mobility in room-temperature RF-sputtered gadolinium doped ceria (GDC) thin films grown on industrial solid oxide fuel cell substrates as a function of air-annealing at 800 and 1000 °C. The combination X-ray diffraction, photoelectron spectroscopy, operando absorption Raman spectroscopy allows us to study different Ce
This study investigates the temperature-induced hysteretic behavior of resistivity and magnetoresistance in electrodeposited bismuth films, with a focus on their application as absorbers transition-edge sensors (TESs) for X-ray detection. Through series resistance versus temperature measurements from room to few Kelvins, we explore change conductive various substrates at temperatures. Our findings show first time both irreversible changes function temperature. Further, reveal notable...
We investigated the influence of fuel change, from pure hydrogen to hydrogen-ammonia mixture at different percentage, on electrochemical behaviour 50 mm in diameter Solid Oxide Fuel Cells (SOFC) with sputtered thin buffer layers Gd doped Ceria, varying working temperatures 800°C 650°C. The results show that performances cells are not affected by change for high (800°C and 750°C). As an example, a power density value 802 mW∙cm-2 1 A∙cm-2 is found when directly feeding cell 8 Nml∙min-1cm-2...
We have studied the low temperature electrical transport properties of La x Sr1-x CuO2 thin films grown by oxide molecular beam epitaxy on (1 1 0) GdScO3 and TbScO3 substrates. The transmission electron microscopy measurements x-ray diffraction analysis confirmed obtained study their normal state properties, removing ambiguity regarding truly conducting layer, allowed to highlight presence a robust hidden Fermi liquid charge in infinite layer doped cuprate superconductors. These results are...
In a time, where first solid oxide based systems enter demonstration and commercial markets, the European NewSOC project focuses on next generations. It aims at significantly improving performance, durability, cost competitiveness of cells stacks compared to state-of-the-art (SoA). order achieve these goals, investigates twelve innovative concepts in following areas: (i) structural optimization architectures SoA materials, (ii) alternative which allow for overcoming inherent challenges SoA,...
The effects of an applied strain tensor on the electrical resistivity a manganite granular system are investigated using simple approach describing induced deformation in terms tilt angle between adjacent grains. results obtained assuming each grain as given by metallic part, coming from inner grain, and surface-related tunnel contribution, allow us to estimate appreciable variations even case small angles.
We grew Sr1-xLaxCuO2 thin films and SrCuO2/Sr0.9La0.1CuO2/SrCuO2 trilayers by reflection high-energy diffraction-calibrated layer-by-layer molecular beam epitaxy, to study their electrical transport properties as a function of the doping thickness central Sr0.9La0.1CuO2 layer. For trilayer samples, already observed in underdoped SLCO films, resistivity versus temperature curves layer show, for thicknesses thinner than 20 unit cells, sudden upturns low range with possibility identifying,...
Solid oxide technologies (SOC: fuel cells SOFC & electrolysis SOE) are key enabling for energy systems based on renewable sources and allow a strong interlinking of sectors electricity, heat, gas/fuels. SOC can emerge as players in many concepts, such fuel/gas to power heat at small large scale, storage through hydrogen/fuel, utilization upgrading biogas, balancing intermittent electricity from load following reversible operation, central decentral solutions production. In time, where...
In recent years, Gadolinium Doped Ceria (GDC) barrier layers have been reported to enhance the performance of Solid Oxide Fuel Cells (SOFCs)by reducing cathode/electrolyte interface diffusion and improving ionic conductivity. Prior investigations demonstrated that GDC thin film sputtered at room-temperature yields substantial enhancements in (SOFCs).This enhancement is evidenced by a noteworthy increase output current (+78%) considerable reduction ohmic resistance (up -42%), compared...
The effects of an external strain tensor on the electrical resistivity a manganite granular system are investigated using simple approach describing induced deformation in terms tilt angle between adjacent grains. results obtained assuming each grain as given by metallic part, coming from inner grain, and surface related tunnel contribution, allow to estimate appreciable variations even case small angles.
Electrostatically defined perovskite oxide heterostructures, in which carriers are confined by the modulation of A-site ion charge, offer new possibilities tuning magnetic properties manganite oxides. We investigate preferential orientation ferromagnetic and antiferromagnetic moments ultrathin ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$ layers embedded $\mathrm{Sr}{\mathrm{MnO}}_{3}$ as they undergo a metal-to-insulator transition with decreasing thickness. Our results evince...