A5101979084- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- GaN-based semiconductor devices and materials
- Advanced Battery Technologies Research
- Microwave Engineering and Waveguides
- Radio Frequency Integrated Circuit Design
- Supercapacitor Materials and Fabrication
- Extraction and Separation Processes
- Acoustic Wave Phenomena Research
- Advanced battery technologies research
- Semiconductor materials and interfaces
- Ga2O3 and related materials
- Silicon Carbide Semiconductor Technologies
- Metal and Thin Film Mechanics
- ZnO doping and properties
- Acoustic Wave Resonator Technologies
- Adaptive Control of Nonlinear Systems
- Advancements in Semiconductor Devices and Circuit Design
- Electron and X-Ray Spectroscopy Techniques
- Transition Metal Oxide Nanomaterials
- Underwater Vehicles and Communication Systems
- Guidance and Control Systems
- Microfluidic and Capillary Electrophoresis Applications
- Cultural and Historical Studies
Korea Research Institute of Standards and Science
2025
Korea University of Science and Technology
2025
Pohang University of Science and Technology
2020-2024
Oxford Instruments (United Kingdom)
2024
Doosan (South Korea)
2023
University of Glasgow
2013-2020
North Carolina Agricultural and Technical State University
2015-2019
Semyung University
2018-2019
Greensboro College
2017-2018
Georgia Institute of Technology
2016-2017
We report the chemical synthesis of Fe-core/Au-shell nanoparticles by a reverse micelle method, and investigation their growth mechanisms oxidation-resistant characteristics. The core-shell structure presence Fe & Au phases have been confirmed transmission electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Mossbauer inductively coupled plasma techniques. Additionally, atomic-resolution Z-contrast imaging loss spectroscopy (EELS) in scanning microscope (STEM) used to...
We present a novel binder-free multiwall carbon nanotube (MWCNT) structure as an anode in Li ion batteries. The interface-controlled MWCNT structure, synthesized through two-step process of catalyst deposition and chemical vapor (CVD) directly grown on copper current collector, showed very high specific capacity, almost three times that graphite, excellent rate capability even at charging/discharging 3 C, no capacity degradation up to 50 cycles. Significantly enhanced properties this could...
Abstract Anode‐free Li metal batteries are one of the finest prospects for increasing energy density beyond that standard lithium‐ion batteries. Conversely, absence reservoir generates unwarranted volume expansion, permitting electrolyte depletion and rapid cathode capacity consumption. To address this issue, an anode‐free battery with ion‐conductive layer coated Cu current collector Ag/L in typical carbonate‐based electrolytes is presented. The ion‐conducting causes stable solid interphase...
Abstract Modern strides in energy storage underscore the significance of all‐solid‐state batteries (ASSBs) predicated on solid electrolytes and lithium (Li) metal anodes response to demand for safer batteries. Nonetheless, ASSBs are often beleaguered by non‐uniform Li deposition during cycling, leading compromised cell performance from internal short circuits hindered charge transfer. In this study, concept “bottom deposition” is introduced stabilize based lithiophilic current collector a...
Progressing toward the emerging era of high-energy-density batteries, stable and safe employment lithium (Li) metal anodes is highly desired. The primary concern with Li their uncontrollable dendrites growth extreme sensitivity to parasitic degradation reactions, raising alarms for battery safety shelf life. Nanolayer protection encapsulation, which conformal ionically conductive a high-κ dielectric property, can suppress empower stabilization metal. In this work, engineering zirconia (ZrO2)...
The Georgia Tech Miniature Autonomous Blimp (GT-MAB) is developed as an indoor testbed for robotics research. Compared with existing platforms, the GT-MAB features longer flight times and safer human-robot interactions. influence of aerodynamics on blimp significant must be considered to achieve autonomous flying behaviors. This paper presents mathematical modeling, system identification, controller design GT-MAB, which leads a set motion primitives that can combined waypoint-following....
Abstract Rechargeable batteries have been a profoundly greater part of our lives than we could ever imagined. The rechargeable Li‐ion (LIBs) that developed for transport systems even put fossil fuels in the corner. However, state‐of‐the‐art with graphite anodes are now approaching their theoretical specific energy limits, so they cannot meet increasing demands range portable electronics and large‐scale storage systems. Li metal is one most promising anode materials break through density...
Abstract Sulfide solid electrolytes (SSEs) have garnered significant attention for their high ionic conductivity in the development of all‐solid‐state batteries (ASSBs). However, SSEs face challenges due to poor chemical and electrochemical stability, leading SE decomposition at anode, which turn increases internal resistance reduces cycle performance. Herein, address this issue, thin polymer layers are applied prevent direct contact between SSE anode using initiated vapor deposition...
Abstract Nanostructured transition metal oxides (NTMOs) have consistently piqued scientific interest for several decades due to their remarkable versatility across various fields. More recently, they gained significant attention as materials employed energy storage/harvesting devices well electronic devices. However, mass production of high‐quality NTMOs in a well‐controlled manner still remains challenging. Here, universal, ultrafast, and solvent‐free method is presented producing highly...
The urgent necessity to establish a standard for bulk resistance quantification is identified <italic>via</italic> ionic conductivity dependence on high frequency point.
We report on a measurement of the $\Omega_c^0$ lifetime using $\Omega_c^0 \to \Omega^-\pi^+$ decays reconstructed in $e^+e^-\to c\bar{c}$ data collected by Belle II experiment and corresponding to $207~{\rm fb^{-1}}$ integrated luminosity. The result, $\rm\tau(\Omega_c^0)=243\pm48( stat)\pm11(syst)~fs$, agrees with recent measurements indicating that is not shortest-lived weakly decaying charmed baryon.
Abstract All‐solid‐state batteries (SSBs) represent one of the most promising avenues for surpassing energy density limitations conventional lithium‐ion batteries. However, unstable interfacial contact between solid‐state electrolyte and electrode poses a critical challenge practical applications. To tackle this issue, hybrid system incorporating both liquid electrolytes (LEs) sulfide may serve as viable alternative. In system, LE facilitates in situ formation solid interphase layer, thereby...
The first-ever demonstration of stabilized Si/lithium–manganese-rich full cells, capable retaining >90% energy over early cycling and capacity more than 750 cycles at the 1C rate (100% depth-of-discharge), is made through utilization a modified ionic-liquid electrolyte forming favorable cathode–electrolyte interface.
In this work, nanoscale porous lithium titanate (LTO) anode material was synthesized by using aqueous spray drying method after ball milling. The size of the LTO nanoparticles optimized to 200 nm because its considerable moisture absorption levels for stable performance and cooperation make good quality electrodes found with testing. electrochemical be very at high operating temperature (50 °C) current rate (5 C) which worth noticing than usual unfavorable behaviors (gas generation surface...
Metal fluorides with high redox potential and capacity from strong metal–fluoride bond conversion reaction make them promising cathodic materials. However, detailed lithium insertion extraction mechanisms have not yet been clearly understood explained. Here we report low-temperature synthesis of electrochemically active FeF3/FeF2 nanoparticles by catalytic decomposition a fluoropolymer [perfluoropolyether (PFPE)] using hydrated iron oxalate precursor both in air inert atmosphere. Freshly...
All-solid-state batteries (ASSBs) possess the advantage of ensuring safety while simultaneously maximizing energy density, making them suitable for next-generation battery models. In particular, sulfide solid electrolytes (SSEs) are viewed as promising candidates ASSB due to their excellent ionic conductivity. However, a limitation exists in form interfacial side reactions occurring between SSEs and cathode active materials (CAMs), well generation sulfide-based gases within SSE. These issues...