A5059455430- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Advancements in Battery Materials
- ZnO doping and properties
- Transition Metal Oxide Nanomaterials
- Electron and X-Ray Spectroscopy Techniques
- Advanced Battery Materials and Technologies
- Gas Sensing Nanomaterials and Sensors
- Ga2O3 and related materials
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- GaN-based semiconductor devices and materials
- Catalytic Processes in Materials Science
- Advanced Memory and Neural Computing
- Advanced Semiconductor Detectors and Materials
- CO2 Reduction Techniques and Catalysts
- Low-power high-performance VLSI design
- Geophysics and Gravity Measurements
- Cosmology and Gravitation Theories
- Astro and Planetary Science
- History and Developments in Astronomy
- Advanced Battery Technologies Research
- Silicon and Solar Cell Technologies
- Historical Astronomy and Related Studies
- Anodic Oxide Films and Nanostructures
University of Maryland, College Park
2017-2024
United States Naval Research Laboratory
2024
Towson University
2013-2021
We show that the deposition of solid-state electrolyte LiPON onto films V2O5 leads to their uniform lithiation up 2.2 Li per V2O5, without affecting concentration in and its ionic conductivity. Our results indicate incorporation occurs during deposition, contrast earlier mechanisms proposed explain postdeposition transfer between LiCoO2. use our discovery demonstrate symmetric thin film batteries with a capacity >270 mAh/g, at rate 20C, 1600 cycles only 8.4% loss capacity. also how...
Multimetallic nanoalloy catalysts have attracted considerable interest for enhancing the efficiency and selectivity of many electrochemically driven chemical processes. However, preparation homogeneous bimetallic alloy nanoparticles remains a challenge. Here, we present room-temperature scalable, host-guest approach synthesis dilute Cu in Ag nanoparticles. In this approach, an ionic silver bromide precursor harboring exogenous cations is reduced to yield ∼20 nm diameter AgCu wherein %...
Most attempts to unify general relativity with the standard model of particle physics predict violations equivalence principle associated in some way composition test masses. We this idea by using observational uncertainties positions and motions solar-system bodies set upper limits on possible differences $\Delta$ between gravitational inertial mass each body. For suitable pairs objects, it is constrain three different linear combinations Kepler's third law, migration stable Lagrange...
Interest in thin film solid state lithium-ion batteries (TFSSLIBs) continues to grow because of their increased safety over flammable liquid electrolytes and compatibility with well-established thin-film fabrication methods characterization techniques. TFSSLIBs are also attractive for addressing fundamental questions they generally comprise fewer components (no binders or conductive additives), commonly used investigate the formation evolution electrode/electrolyte interfaces. well suited...
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Controlled stress is critical to both fabrication and operation of solid-state batteries ensure pristine, low-impedance interfaces. The effects externally applied stresses on overall cell performance degradation due altered thermodynamics, interfacial kinetics, bulk transport the active species have been studied in several prior works. In addition stack pressure which can vary up 100s MPa, internal localized a few ~1 GPa be generated from volume changes during charge discharge. Electrode...
The application of a solid-electrolyte may enable the use certain high energy density anodes like Li and Si also circumvents flammable liquid-electrolyte. However, all solid components introduce multiple solid-solid interfaces whose responses are strongly affected by mechanical state region on both sides, which can be combination applied stack pressure cycling induced volumetric change 1 . Electrochemo-mechanical coupling (ECM) studies 2 relatively new area for this society, especially with...
We report our studies of the thickness dependence electrical resistivity and lattice constants in strained epitaxial thin films calcium manganese oxide. Our results indicate potential bi-axial mismatch strain as a handle for modulating resistivity. observe consistent with what is expected relaxation thicker than 400 Å. At lower values, anomalies are observed suggestive reduced oxygen stoichiometry. remarkable decrease decreasing film thickness. The thinnest (5–7 nm) about three orders...
Understanding the impact of high-energy electron radiation on device characteristics remains critical for expanding use semiconductor electronics in space-borne applications and other harsh environments. Here, we report situ measurements effects hole diffusion length low threading dislocation density homoepitaxial bulk n-GaN Schottky diodes using beam induced current (EBIC) high-voltage scanning microscopy mode. Despite large interaction volume this system, quantitative EBIC imaging is...
Understanding and mitigating the adverse effects of radiation on semiconductor devices remains an active area research motivated by increased use electronics in high environments. When a device is exposed to energetic particles, variety structural defects are created then redistributed through diffusion, cluster formation, recombination. How distributed can profoundly affect its electrical characteristics, yet methods which reliably image this distribution lacking. In first part my...
He+ beam, is attributed to localized interfacial Pb centers and delocalized positive fixed-charges, as surmised from simulations. Comprehension of the long-term interaction mobility radiation-induced damage are key for future design rad-hard devices.