A5054033892- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Extraction and Separation Processes
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Fuel Cells and Related Materials
- Conducting polymers and applications
- Electron and X-Ray Spectroscopy Techniques
- Semiconductor materials and devices
- Thermal Expansion and Ionic Conductivity
- Electrochemical Analysis and Applications
- Graphene research and applications
- Transition Metal Oxide Nanomaterials
- MXene and MAX Phase Materials
- Inorganic Fluorides and Related Compounds
- Electrocatalysts for Energy Conversion
- 2D Materials and Applications
- Fiber-reinforced polymer composites
- Spectroscopy Techniques in Biomedical and Chemical Research
- Catalytic Processes in Materials Science
- Recycling and Waste Management Techniques
- Inorganic Chemistry and Materials
Menlo School
2023-2025
SLAC National Accelerator Laboratory
2022-2025
Stanford University
2023-2024
Oak Ridge National Laboratory
2014-2023
University of Tennessee at Knoxville
2014-2022
Knoxville College
2020-2022
Oak Ridge Associated Universities
2015-2021
Argonne National Laboratory
2021
Auburn University
2020
Shanghai Normal University
2020
Large scale synthesis and delamination of 2D Mo 2 CT x (where T is a surface termination group) has been achieved by selectively etching gallium from the recently discovered nanolaminated, ternary transition metal carbide Ga C. Different routes result in different flake morphologies. The resistivity free‐standing films increases an order magnitude as temperature reduced 300 to 10 K, suggesting semiconductor‐like behavior this MXene, contrast Ti 3 C which exhibits metallic behavior. At...
Herein we report on a general approach to delaminate multi-layered MXenes using an organic base induce swelling that in turn weakens the bonds between MX layers. Simple agitation or mild sonication of swollen MXene water resulted large-scale delamination The method is demonstrated for vanadium carbide and titanium carbonitride MXenes.
This study investigates the thermal conductivity and viscosity of copper nanoparticles in ethylene glycol. The nanofluid was prepared by synthesizing using a chemical reduction method, with water as solvent, then dispersing them glycol sonicator. Volume loadings up to 2% were prepared. measured increase twice value predicted Maxwell effective medium theory. about four times that Einstein law viscosity. Analytical calculations suggest this would not be beneficial coolant heat exchangers...
We report a two-step synthesis of highly luminescent CdS/ZnSe core/shell nanocrystals (emission quantum yields up to 50%) that can produce efficient spatial separation electrons and holes between the core shell (type-II localization regime). Our involves fabrication cubic-singony CdS particles are subsequently overcoated with layer ZnSe in presence surfactant-ligands noncoordinating solvent. Studies different growth regime indicate one approach obtaining high emission efficiencies is through...
Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> (LLZO) reacts with humid air; the most favorable reaction pathway involves protonation of LLZO and formation Li<sub>2</sub>CO<sub>3</sub>. The air exposure-induced contamination layer impacts Li–LLZO interfacial resistance.
Fluoroethylene carbonate (FEC) has been proposed as an effective electrolyte additive that enhances the stability and elasticity of solid interphase (SEI) emerging Si Li metal anodes. However, uncertainties still remain on exact mechanism through which FEC alters decomposition SEI formation process. Herein, influence LiPF6/ethylene (EC) electrolytes for anodes is investigated classical molecular dynamics, Fourier-transform infrared spectroscopy, quantum chemical calculations. Albeit a...
ADVERTISEMENT RETURN TO ISSUEPREVEnergy FocusNEXTChallenges for and Pathways toward Li-Metal-Based All-Solid-State BatteriesPaul AlbertusPaul AlbertusDepartment of Chemical Biomolecular Engineering, University Maryland, College Park, Maryland 20742, United StatesMore by Paul Albertushttp://orcid.org/0000-0003-0072-0529, Venkataramani AnandanVenkataramani AnandanFord Motor Company, Dearborn, Michigan 48121, Anandan, Chunmei BanChunmei BanMechanical Engineering Department, Colorado, Boulder,...
Herein, two new two‐dimensional Nb 4 C 3 ‐based solid solutions (MXenes), (Nb 0.8 ,Ti 0.2 ) T x and ,Zr (where is a surface termination) were synthesized—as confirmed by X‐ray diffraction—from their corresponding MAX phase precursors AlC . This the first report on Zr‐containing MXene. Intercalation of Li ions into these compositions, was studied to determine potential those materials for energy storage applications. Lithiation delithiation peaks at 2.26 2.35 V, respectively, appeared in case...
The effect of different environments on the oxidation Ti<sub>3</sub>C<sub>2</sub>MXene structures is investigated using ReaxFF molecular dynamics simulations and experimental techniques.
Understanding of structural, electrical, and gravimetric peculiarities water vapor interaction with ion-intercalated MXenes led to design a multimodal humidity sensor. Neutron scattering coupled molecular dynamics ab initio calculations showed that small amount hydration results in significant increase the spacing between MXene layers presence K Mg intercalants layers. Films K- Mg-intercalated exhibited relative (RH) detection thresholds ∼0.8% RH monotonic response 0–85% range. We found is...
Herein, we report on the electrochemical performance of two-dimensional transition metal carbonitrides as novel promising electrode materials in K-ion batteries.
Abstract Potassium (K) metal anodes suffer from a challenging problem of dendrite growth. Here, it is demonstrated that tailored current collector will stabilize the plating–stripping behavior even with conventional KPF 6 ‐carbonate electrolyte. A 3D copper functionalized partially reduced graphene oxide to create potassiophilic surface, electrode being denoted as rGO@3D‐Cu. Potassiophilic versus potassiophobic experiments demonstrate molten K fully wets rGO@3D‐Cu after s, but does not wet...
Uncontrolled zinc electrodeposition is an obstacle to long-cycling batteries. Much has been researched on regulating electrodeposition, but rarely are the studies performed in presence of a separator, as practical cells. Here, we show that microstructure separators determines behavior zinc. Porous direct deposit into their pores and leave "dead zinc" upon stripping. In contrast, nonporous separator prevents penetration. Such difference between two types distinguished only if caution taken...
Silicon (Si) is the most naturally abundant element possessing 10-fold greater theoretical capacity compared to that of graphite-based anodes. The practicality implementing Si anodes is, however, limited by unstable solid/electrolyte interphase (SEI) and anode fracturing during continuous lithiation/delithiation. We demonstrate glyme-based electrolytes (GlyEls) ensure a conformal SEI on keep "fracture-free". Benchmarking against optimal, commonly used carbonate electrolyte with...
In this Perspective, we assess the promise and challenges for solid-state batteries (SSBs) to operate under fast-charge conditions (e.g., <10 min charge). We present limitations of state-of-the-art lithium-ion (LIBs) liquid-based lithium metal in context, highlight distinct advantages offered by SSBs with respect rate performance, thermal safety, cell architecture. Despite promising attributes SSBs, must overcome fundamental pertaining electro-chemo-mechanics interaction, interface...
Abstract Lithium‐ion batteries are overreliant on cobalt containing cathodes. Current projections estimate that hundreds of millions electric vehicles (EVs) will be the road by 2050, and this ever‐growing demand threatens to deplete global reserves at an alarming rate. Moreover, supply chain issues have significantly increased prices throughout last decade. As such, energy storage research development need reduce reliance meet for lithium‐ion batteries. The present review summarizes science...
Abstract The garnet‐type phase Li 7 La 3 Zr 2 O 12 (LLZO) attracts significant attention as an oxide solid electrolyte to enable safe and robust solid‐state batteries (SSBs) with potentially high energy density. However, while progress has been made in demonstrating compatibility metal, integrating LLZO into composite cathodes remains a challenge. current perspective focuses on the critical issues that need be addressed achieve ultimate goal of all‐solid‐state LLZO‐based battery delivers...
We report the synthesis of three sizes thioglycerol-capped precipitated ZnS nanocrystallites with relatively narrow size distributions, having average 1.8, 2.5, and 3.5 nm, respectively. These crystallites were extracted as free-standing powders which remain stable under normal atmospheric conditions can be redispersed in suitable solvents. The nanocrystallite characterized using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), (ED), energy dispersive...
We study the effect of thiols on emission efficiency aqueous CdSe/ZnS core/shell nanocrystal quantum dots (NQDs). observe that impact thiol addition yields (QYs) is time-, concentration-, and pH-dependent. Further, we use a combination time-resolved spectroscopic methods to determine mechanism by which can cause either increases or decreases in QYs. Specifically, through transient absorption measurements, show improve passivation electron traps, increasing QYs at low concentrations. using...