A5022232087- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Nuclear reactor physics and engineering
- Advanced Numerical Methods in Computational Mathematics
- Water Quality Monitoring Technologies
- Computational Fluid Dynamics and Aerodynamics
- Nuclear Materials and Properties
- Analytical Chemistry and Sensors
- Fuel Cells and Related Materials
- Embedded Systems Design Techniques
- Radiation Effects in Electronics
- Parallel Computing and Optimization Techniques
- Numerical methods for differential equations
- Machine Learning in Materials Science
- Nuclear and radioactivity studies
- Real-time simulation and control systems
- Power System Optimization and Stability
- Real-Time Systems Scheduling
- Catalytic Processes in Materials Science
- Fiber-reinforced polymer composites
- Additive Manufacturing Materials and Processes
- Supercapacitor Materials and Fabrication
- Model Reduction and Neural Networks
- Additive Manufacturing and 3D Printing Technologies
Oak Ridge National Laboratory
2016-2025
National Transportation Research Center
2022
Office of Scientific and Technical Information
2020
National Technical Information Service
2020
University of Central Florida
2019
University of Kansas
2003-2009
Using neutron tomographic imaging, we report for the first time three-dimensional spatial distribution of lithium products in electrochemically discharged lithium-air cathodes. Neutron imaging finds a nonuniform product across electrode thickness, with species concentration being higher near edges Li-air and relatively uniform center electrode. The experimental images were analyzed context results obtained from 3D modeling that maps spatiotemporal variation using kinetically coupled...
The performance of lithium-ion batteries (LIB) using organic electrolytes strongly depends on the formation a stable solid electrolyte interphase (SEI) film. Elucidating dynamic evolution and spatial composition SEI can be very useful to study stability components help optimize cycles LIB. We propose classical molecular dynamics simulation protocol for predicting first stages reaction method involving decomposition EC LiPF6 molecules in electrolyte. accelerate near anode surface by...
We demonstrate the lithiation process in graphitic anodes using situ neutron radiography and diffraction a single-layer pouch cell. The variation absorption contrast graphite shows direct correlation between degree of discharge potential. experimental attenuation line profiles across electrode at various times (potentials) were compared with lithium concentration computed 3D electrochemical transport model. In conjunction imaging/radiography, was carried out to obtain information about local...
Lithium-ion batteries are highly complex electrochemical systems whose performance and safety governed by coupled nonlinear electrochemical-electrical-thermal-mechanical processes over a range of spatiotemporal scales. Gaining an understanding the role these as well development predictive capabilities for design better performing requires synergy between theory, modeling, simulation, fundamental experimental work to support models. This paper presents overview performed authors aligned with...
Abstract Long-range electric vehicles (EVs) require high-energy-density batteries that also meet the power demands of high current charge and discharge. Ultra-thick (>100 µm) Lithium-ion battery electrodes are critical to enable this need, but slow ion transport in conventional uniform (UEs) reduces capacity at increasing charge/discharge rates. We present a 3D computational analysis on impact structured electrode (SE) graded (GE) geometries discharge rate capability ultra-thick...
A novel numerical model for groundwater flow in karst aquifers is presented. discrete-continuum (hybrid) approach, which a three-dimensional matrix coupled with one-dimensional conduit flow, was used. The laminar the described by variably saturated equation to account important hydrodynamic effects both and unsaturated zones. Turbulent free surface pressurized conditions captured via noninertia wave equation, whereas coupling of two domains established through an exchange term proportional...
An innovative approach to improve the energy density of redox flow batteries (RFBs) through electrochemically mediated reactions is demonstrated. Soluble anion radical species (biphenyl and pyrene) mediate reversible sodium storage in a red phosphorus (P) anode located an external packed bed reactor absence binders or conductive additives. Because can be recycled several times cell stack during single charge/discharge cycle, RFB effectively decouples battery's from species' solubility...
ADVERTISEMENT RETURN TO ISSUEPREVEnergy FocusNEXTA Minimal Information Set To Enable Verifiable Theoretical Battery ResearchAashutosh MistryAashutosh MistryChemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United StatesMore by Aashutosh Mistryhttps://orcid.org/0000-0002-4359-4975, Ankit VermaAnkit VermaEnergy Conversion Storage Systems Center, Renewable Energy Golden, Colorado 80401, Vermahttps://orcid.org/0000-0002-7610-8574, Shashank...
The onset of lithium nucleation and subsequent plating on the graphite particles is a challenging problem in design fast charging batteries. A variational phase field formulation has been developed to initiate based local overpotential conditions allowing predict under charge conditions. model demonstrates that (1) at small current density, there no metallic lithium, effect intercalation kinetics; (2) intermediate densities, initially stagnated growth from isolated nuclei observed followed...
This paper presents a mathematical and computational framework for initial value problems (IVP) in which the numerical approximations can be of higher order global differentiability space time resulting processes are unconditionally stable. is accomplished using Hk, p scalar product spaces containing basis functions degree = (p1,p2), p1 p2 being degrees local approximation k (k1, k2), k1 k2 orders ensuring that integral forms space-time variationally consistent (STVC). It shown (in time) an...
We performed finite element simulations of spherical indentation Li-ion pouch cells. Our model fully resolves different layers in the cell. The results layer resolved models were compared to available literature that treat cell as an equivalent homogenized continuum material. Simulations carried out for sizes indenter. show calibration a failure criterion depends on indenter size, whereas layer-resoled model, such dependency is greatly diminished.