A5042561977- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Ionic liquids properties and applications
- Advanced Battery Technologies Research
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- Conducting polymers and applications
- Fuel Cells and Related Materials
- Extraction and Separation Processes
- Spectroscopy and Quantum Chemical Studies
- Material Dynamics and Properties
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Supercapacitor Materials and Fabrication
- Solid-state spectroscopy and crystallography
- Thermodynamic properties of mixtures
- Chemical and Physical Properties in Aqueous Solutions
- Advanced NMR Techniques and Applications
- Polymer Nanocomposites and Properties
- Analytical Chemistry and Sensors
- Phase Equilibria and Thermodynamics
- Polymer crystallization and properties
- Electrocatalysts for Energy Conversion
- Advanced Chemical Physics Studies
- NMR spectroscopy and applications
DEVCOM Army Research Laboratory
2016-2025
United States Army Combat Capabilities Development Command
2019-2025
University of Glasgow
2023
Argonne National Laboratory
2021
Adelphi Laboratory Center
2012-2020
Sensors (United States)
2015-2020
University of Maryland, College Park
2016
Center of Research and Technologic Development in Electrochemistry
2015
University of Utah
2004-2014
Triangle
2014
A concentrated effort for battery safety Aqueous electrolytes are limited to run below 1.23 V avoid degradation. Suo et al. smash through this limit with an aqueous salt solution containing lithium (Li) bis(trifluoromethane sulfonyl)imide create electrolyte that has electrochemical window of 3 (see the Perspective by Smith and Dunn). They used extremely high-concentration solutions, which suppressed hydrogen evolution electrode oxidation. At these concentrations, Li solvation shell changes...
Abstract Lithium metal is an ideal battery anode. However, dendrite growth and limited Coulombic efficiency during cycling have prevented its practical application in rechargeable batteries. Herein, we report that the use of highly concentrated electrolytes composed ether solvents lithium bis(fluorosulfonyl)imide salt enables high-rate a anode at high (up to 99.1%) without growth. With 4 M 1,2-dimethoxyethane as electrolyte, lithium|lithium cell can be cycled 10 mA cm −2 for more than 6,000...
A many-body polarizable force field has been developed and validated for ionic liquids (ILs) containing 1-methyl-3-alkylimidazolium, 1-alkyl-2-methyl-3-alkylimidazolium, N-methyl-N-alkylpyrrolidinium, N-alkylpyridinium, N-alkyl-N-alkylpiperidinium, N-alkyl-N-alkylmorpholinium, tetraalkylammonium, tetraalkylphosphonium, N-methyl-N-oligoetherpyrrolidinium cations BF(4)(-), CF(3)BF(3)(-), CH(3)BF(3)(-), CF(3)SO(3)(-), PF(6)(-), dicyanamide, tricyanomethanide, tetracyanoborate,...
Abstract Narrow electrochemical stability window (1.23 V) of aqueous electrolytes is always considered the key obstacle preventing sodium‐ion chemistry practical energy density and cycle life. The water‐in‐salt electrolyte (NaWiSE) eliminates this barrier by offering a 2.5 V through suppressing hydrogen evolution on anode with formation Na + ‐conducting solid‐electrolyte interphase (SEI) reducing overall activity water cathode. A full Na‐ion battery constructed 0.66 [Mn Ti 0.34 ]O 2 as...
The mechanisms of lithium cation (Li+) and bis(trifluoromethane)sulfonamide anion (TFSI-) transport in poly(ethylene oxide) (PEO, Mw = 2380) melts were examined using molecular dynamics (MD) simulations over a wide range salt concentrations temperatures. MD quantum-chemistry-based many-body polarizable force field yielded ion self-diffusion coefficients, electrolyte conductivity, aggregation, the coordination environment Li+ good agreement with experiment. Lithium was found to arise from...
Abstract A new super‐concentrated aqueous electrolyte is proposed by introducing a second lithium salt. The resultant ultra‐high concentration of 28 m led to more effective formation protective interphase on the anode along with further suppression water activities at both and cathode surfaces. improved electrochemical stability allows use TiO 2 as material, 2.5 V Li‐ion cell based LiMn O 4 carbon‐coated delivered unprecedented energy density 100 Wh kg −1 for rechargeable cells, excellent...
Solid-electrolyte interphase (SEI) is the key component that enables all advanced electrochemical devices, best representative of which Li-ion battery (LIB). It kinetically stabilizes electrolytes at potentials far beyond their thermodynamic stability limits, so cell reactions could proceed reversibly. Its ad hoc chemistry and formation mechanism has been a topic under intensive investigation since first commercialization LIB 25 years ago. Traditionally SEI can only be formed in nonaqueous...
Breakthroughs in performance of Li/Cu with Ni-rich cathodes can be achieved <italic>via</italic> manipulation anion interfacial chemistry, as uncovered by experiment/modeling.
Efficient, rechargeable Mg and Ca batteries Divalent metal such as those based on magnesium calcium are of interest because the abundance these elements their lower tendency to form dendrites, but practical demonstrations lacking. Hou et al . used methoxyethyl amine chelants in which ligands attach atom more than one place, modulating solvation structure ions enable a facile charge-transfer reaction (see Perspective by Zuo Yin). In full battery cells, components lead high efficiency energy...
Highly concentrated electrolytes containing carbonate solvents with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) have been investigated to determine the influence of eliminating bulk solvent (i.e., uncoordinated a Li+ cation) on electrolyte properties. The phase behavior ethylene (EC)–LiTFSI mixtures indicates that two crystalline solvates form—(EC)3:LiTFSI and (EC)1:LiTFSI. Crystal structures for these were determined obtain insight into ion coordination. Between compositions,...
Using molecular dynamics simulations, small-angle neutron scattering, and a variety of spectroscopic techniques, we evaluated the ion solvation transport behaviors in aqueous electrolytes containing bis(trifluoromethanesulfonyl)imide. We discovered that, at high salt concentrations (from 10 to 21 mol/kg), disproportion cation occurs, leading liquid structure heterogeneous domains with characteristic length scale 1 2 nm. This unusual nano-heterogeneity effectively decouples cations from...