A5071791611- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Thermoregulation and physiological responses
- Sports Performance and Training
- Exercise and Physiological Responses
- Advanced Battery Technologies Research
- Sports injuries and prevention
- Solid-state spectroscopy and crystallography
- Advancements in Solid Oxide Fuel Cells
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Extraction and Separation Processes
- Hydrogen Storage and Materials
- Electrochemical Analysis and Applications
- Semiconductor materials and interfaces
- Inorganic Fluorides and Related Compounds
- Infrared Thermography in Medicine
- Semiconductor materials and devices
- Cardiovascular and exercise physiology
- Thermodynamic and Structural Properties of Metals and Alloys
- Inorganic Chemistry and Materials
- Cardiovascular Effects of Exercise
- Catalysis and Oxidation Reactions
- Electrocatalysts for Energy Conversion
- Thermal Expansion and Ionic Conductivity
University of Connecticut
2016-2025
Cardiff University
2011-2024
Brotman Baty Institute
2013-2021
Stanford University
2007-2017
Indiana Athletic Trainers Association
2017
California State University, Fullerton
2015
University of North Texas
2015
The Ohio State University
2015
U.S. Army Research Institute of Environmental Medicine
2015
Hellenic American University
2015
An electrochemical galvanostatic intermittent titration technique (GITT) is described which combines both transient and steady‐state measurements to obtain kinetic properties of solid mixed‐conducting electrodes, as well thermodynamic data. The derivation quantities such the chemical component diffusion coefficients, partial conductivity, mobility, enhancement factor, parabolic rate constant a function stoichiometry presented. A description factors governing equilibration composition...
has been measured at room temperature as a function of frequency from to various open‐circuit voltages. The diffusion equations have solved for the appropriate finite boundary conditions, and analysis impedance data by complex plane method yields values chemical coefficient, component partial ionic conductivity lithium, thermodynamic enhancement factor . films were prepared vacuum evaporation largely amorphous x‐rays. coefficient value , increasing At short times interfacial charge transfer...
The concept of a novel all‐solid composite electrode is presented. One example such contains finely dispersed reactant, , in solid mixed‐conducting matrix, . Repeated charging and discharging electrodes without appreciable loss capacity has been demonstrated. polarization found to be comparable values typical highly porous systems molten salt electrolytes.
The electrical power grid faces a growing need for large-scale energy storage over wide range of time scales due to costly short-term transients, frequency regulation, and load balancing. durability, high power, efficiency, low cost needed grid-scale pose substantial challenges conventional battery technology. (1, 2) Here, we demonstrate insertion/extraction sodium potassium ions in low-strain nickel hexacyanoferrate electrode material at least five thousand deep cycles current densities...
Spinel LiMn2O4 is a low-cost, environmentally friendly, and highly abundant material for Li-ion battery cathodes. Here, we report the hydrothermal synthesis of single-crystalline β-MnO2 nanorods their chemical conversion into free-standing using simple solid-state reaction. The have an average diameter 130 nm length 1.2 μm. Galvanostatic testing showed that high charge storage capacity at power rates compared with commercially available powders. More than 85% initial was maintained over 100...
The impedance behavior of silicon nanowire electrodes has been investigated to understand the electrochemical process kinetics that influences performance when used as a high-capacity anode in lithium ion battery. ac response was measured by using spectroscopy equilibrium conditions at different compositions and during several cycles charge discharge half cell vs. metallic lithium. analysis shows contribution both surface resistance solid state diffusion through bulk nanowires. is dominated...
The reversible insertion of monovalent ions such as lithium into electrode materials has enabled the development rechargeable batteries with high energy density. Reversible divalent magnesium would allow creation new battery chemistries that are potentially safer and cheaper than lithium-based batteries. Here we report nanomaterials in Prussian Blue family open framework materials, nickel hexacyanoferrate, for aqueous alkaline earth ions, including Mg(2+), Ca(2+), Sr(2+), Ba(2+). We show...
Recent battery research has focused on the high power and energy density needed for portable electronics vehicles, but requirements grid-scale storage are different, with emphasis low cost, long cycle life, safety.1, 2 Open framework materials Prussian Blue crystal structure offer capability, ultra-long scalable, cost synthesis operation that necessary systems to integrate transient sources, such as wind solar, electrical grid. We have demonstrated two open materials, copper hexacyanoferrate...
In an attempt to overcome problems associated with the reversible lithium electrode in organic solvent‐based electrolytes, electrochemical characteristics of a number binary and ternary alloys propylene carbonate have been studied. Thermodynamic kinetic results for Li‐Sn, Li‐Sb, Li‐Bi systems are reported here. each these systems, one or more two‐phase regions apparently rapid transformation kinetics at ambient temperature identified. Lithium chemical potentials partial molar entropies...
The ionic conductivity of the solid electrolyte NaAl11O17 has been measured from − 150 to + 820°C using a novel nonpolarizing electrode, reversible sodium ions. resistivity at 25°C was found be 72 Ω-cm, lowest value reported for any ionically conducting oxide ceramic. enthalpy motion is 3.79 kcal/mole, and transport ions takes place by an interstitialcy mechanism.
The electrical energy grid has a growing need for storage to address short-term transients, frequency regulation, and load leveling. Though electrochemical devices such as batteries offer an attractive solution, current commercial battery technology cannot provide adequate power, cycle life, efficiency at sufficiently low cost. Copper hexacyanoferrate nickel hexacyanoferrate, two open framework materials with the Prussian Blue structure, were recently shown ultralong life high-rate...
Electrical methods offer advantages for the determination of kinetic and thermodynamic quantities because transducer properties fast ionic conductors. Further applications such techniques depend upon an increased familiarity with them, availability chemically compatible electrodes suitable electrolytes specific species in temperature range interest. Progress is being made search new solid a variety both cationic anionic species. Various electrochemical available studies solids have been...