A5054704542- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Fuel Cells and Related Materials
- Metal and Thin Film Mechanics
- Semiconductor materials and devices
- Electrocatalysts for Energy Conversion
- Magnetic and transport properties of perovskites and related materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Ion-surface interactions and analysis
- Catalysis and Oxidation Reactions
- Diamond and Carbon-based Materials Research
- GaN-based semiconductor devices and materials
- Electron and X-Ray Spectroscopy Techniques
- Catalytic Processes in Materials Science
- Advancements in Battery Materials
- Chemical Looping and Thermochemical Processes
- Semiconductor Quantum Structures and Devices
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Battery Technologies Research
- ZnO doping and properties
- Semiconductor materials and interfaces
- Nuclear Materials and Properties
- Metal Extraction and Bioleaching
- Advanced battery technologies research
Northwestern University
2015-2024
Brookhaven National Laboratory
2016
Georgetown University
2013-2015
Midwestern University
2013-2014
Cook Research (United States)
2011
Functional Coating Technology (United States)
2004-2009
Materials Science & Engineering
1990-2007
American Ceramic Society
2005
Northwest University
1992-2004
Applied Thin Films (United States)
2002-2003
This article provides a perspective review of low-temperature solid oxide fuel cells research and development.
Single-crystal TiN/VN strained-layer superlattices (SLS’s) with layer thicknesses lTiN =lVN =λ/2 (where λ is the period of superlattice) ranging from 0.75 to 16 nm have been grown on MgO(100 ) substrates by reactive magnetron sputtering. Cross-sectional transmission electron microscopy (TEM) and x-ray diffraction examinations showed that films were single crystals exhibiting coherent interfaces several orders superlattice reflections. There was no evidence in either plan-view or...
There are substantial barriers to the introduction of hydrogen fuel cells for transportation, including high cost fuel-cell systems, current lack a infrastructure, and relatively low efficiency when using produced from hydrocarbons. Here, we describe solid oxide cell that combines catalyst layer with conventional anode, allowing internal reforming iso-octane without coking yielding stable power densities 0.3 0.6 watts per square centimeter. This approach is potentially basis simple low-cost...
A model is presented that explains the yield stress and hardness enhancements have been observed in superlattice thin films. The required for dislocations to glide across layers with different shear moduli was calculated using an expression accounts core effects all interfaces trapezoidal or sawtooth composition modulations. predicted strength/hardness enhancement increased increasing period Λ, before reaching a saturation value depended on interface widths. second mechanism, where within...
A high throughput route to screen thermoelectric materials is developed and validated across a broad material set.
Electricity storage is needed on an unprecedented scale to sustain the ongoing transition of electricity generation from fossil fuels intermittent renewable energy sources like wind and solar power.
Abstract Over the last decade, exsolution has emerged as a powerful new method for decorating oxide supports with uniformly dispersed nanoparticles energy and catalytic applications. Due to their exceptional anchorage, resilience various degradation mechanisms, well numerous ways in which they can be produced, transformed applied, exsolved have set standards terms of activity, durability functionality. In conjunction multifunctional such perovskite oxides, becomes platform design advanced...
The elastic constants of single-crystal NbN, VN, and TiN films were determined from surface acoustic wave (SAW) dispersion curves obtained by the use an microscope with a line-focus beam. Measurements carried out for nitride grown on (001) plane cubic-symmetric MgO substrates. phase velocities measured as functions angle propagation display expected anisotropy. Dispersion SAWs propagating along symmetry axes measuring various film thicknesses frequencies. Using modified simplex method,...
Electrolysis was carried out at 700−800 °C using solid oxide electrochemical cells with H2O−CO2−H2 mixtures the Ni-YSZ cathode and air LSCF-GDC anode. (YSZ = 8 mol %, Y2O3-stabilized ZrO2, GDC Ce0.9Gd0.1O1.95, LSCF La0.6Sr0.4Co0.2Fe0.8O3). The cell electrolysis performance decreased only slightly for H2O−CO2 compared to H2O much better than pure CO2 electrolysis. Mass spectrometer measurements showed increasing consumption of production H2 CO current density. Electrolyzers operated on 25%...
The high-pressure rocksalt structure of AlN was stabilized in epitaxial AlN/TiN(001) superlattices with layer thickness $\ensuremath{\le}2.0\mathrm{nm}$. layers were shown to be pure rocksalt-structure AlN, a stress-free lattice parameter $0.408\ifmmode\pm\else\textpm\fi{}0.002\mathrm{nm}$, using x-ray diffraction, transmission electron microscopy, and energy loss spectroscopy. stable hexagonal phase observed for $>2\mathrm{nm}$. formed at small thicknesses since it provided lower AlN/TiN...
Epitaxial stoichiometric (111)-oriented TiN films have been grown on cleaved MgO by dc reactive magnetron sputtering from pure Ti targets at substrate temperatures Ts ranging 525–800 °C. The were in mixed Ar/N2 discharges with the total pressure maintained constant 3.5 mTorr (0.47 Pa). For Ts≲600 °C, N2 partial pressures PN2 that either below or above a narrow range of values, which depended upon Ts, resulted under- over-stoichiometric films, respectively. However, Ts≳600 could be obtained...
Polycrystalline TiN/NbN superlattice coatings were deposited on M2 tool steel substrates using an opposed dual-cathode unbalanced magnetron sputtering system. Superlattice deposition was achieved by placing the a cylindrical holder that rotated axis equidistant between, and parallel to, faces of Ti Nb targets. Cross contamination targets alternating layers minimized baffle or extra-large substrate holder. The period determined rotation speed. Analytical techniques including x-ray...
Reversible solid oxide cells (SOCs) are potentially useful for electrical energy storage due to their good scalability, but have not been seriously considered concerns over round-trip efficiency. Here we propose an SOC chemistry where the fuel cycles between H2O–CO2-rich and CH4–H2-rich gases. The unique feature is formation of CH4 during electrolysis, a less endothermic process than usual H2- or CO-forming reactions, enabling improved Thermodynamic calculations preliminary experiments show...