A5100386955- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Electromagnetic Compatibility and Noise Suppression
- Engineering Applied Research
- ZnO doping and properties
- Advanced Battery Technologies Research
- Electromagnetic Compatibility and Measurements
- Power Line Communications and Noise
- Thin-Film Transistor Technologies
- Aerodynamics and Fluid Dynamics Research
- Advanced Memory and Neural Computing
- Non-Destructive Testing Techniques
- Semiconductor materials and devices
- Advancements in Solid Oxide Fuel Cells
- Advanced MIMO Systems Optimization
- Particle accelerators and beam dynamics
- Electrostatic Discharge in Electronics
- Millimeter-Wave Propagation and Modeling
- Electric Motor Design and Analysis
- Electric Power Systems and Control
- Electronic and Structural Properties of Oxides
- Advanced battery technologies research
- Ga2O3 and related materials
- Welding Techniques and Residual Stresses
Korea Institute of Radiological and Medical Sciences
2020-2025
Pohang University of Science and Technology
2017-2024
Samsung (South Korea)
2011-2024
Korea Polytechnic University
2022
Government of the Republic of Korea
2016-2021
Sungkyunkwan University
2017-2021
Pohang Accelerator Laboratory
2021
Mando Corporation (South Korea)
2016-2021
Chung-Ang University
2018
Yonsei University
2011-2018
We demonstrate that the internal short (IS) approach is a fast and efficient process for lithium pre-doping in lithium-ion capacitors.
Pr 0.6 Sr 0.4 Mn 0.2 Fe 0.7 Ni 0.1 O 3− δ (PSMFN) is developed as a quasi-symmetric electrode catalyst for SOCs, which undergoes in situ exsolution of Fe–Ni alloy nanoparticles with phase transition to Ruddlesden–Popper structure under fuel conditions.
A highly active and stable catalyst La<sub>1.2</sub>Sr<sub>0.8</sub>Mn<sub>0.4</sub>Fe<sub>0.6</sub>O<sub>4−α</sub> (R.P.LSMF) decorated with <italic>in situ</italic> exsolved Fe nanoparticles was derived from La<sub>0.6</sub>Sr<sub>0.4</sub>Mn<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3−δ</sub> (LSMF) by simple annealing applied to CO<sub>2</sub> electrolysis on solid oxide cells (SOECs).
We developed a bifunctional electrode of Pr0.8Sr1.2(Fe,Ni)0.8Nb0.2O4−δ (R.P.PSFNNb) fashioned with in situ exsolved Ni-Fe alloy nanoparticles (NPs) for electrochemical oxidations H2, CO, and syngas as well CO2 electrolysis. The NiFe-R.P.PSFNNb was prepared by phase transition Pr0.4Sr0.6Fe0.8Ni0.1Nb0.1O3−δ (PSFNNb) along exsolution alloys reducing atmosphere, confirmed X-ray diffraction photoelectron spectroscopy (XPS) characterization. XPS H2-temperature-programmed reduction analyses were...
Abstract Despite the very high theoretical energy density, Li‐S batteries still need to fundamentally overcome sluggish redox kinetics of lithium polysulfides (LiPSs) and low sulfur utilization that limit practical applications. Here, highly active stable cathode, nitrogen‐doped porous carbon nanotubes (NPCTs) decorated with Ni x Co 1‐x S 2 nanocrystals are systematically synthesized as multi‐functional electrocatalytic materials. The matrix can contribute adsorption LiPSs on heteroatom...
This study offers a combinatorial approach for suppressing the persistent photo-conductance (PPC) characteristic in solution-processed amorphous oxide semiconductor (AOS) thin-film transistors (TFTs) order to achieve rapid photo-recovery. Various analyses were used examine photo-instability of indium-gallium-zinc-oxide (IGZO) TFTs including negative-bias-illumination-stress (NBIS) and transient photo-response behaviors. It was found that indium ratio metallic components had significant...
Abstract Mixed transition metal oxides are promising anodes to meet high‐performance energy storage materials; however, their widespread uses restrained owing limited theoretical capacity, restricted synthesis methods and templates, low conductivity, extreme volume expansion. Here, Mn 3‐x Fe x O 4 nanosheets with interconnected conductive networks synthesized via a novel self‐hybridization approach of facile, galvanic replacement‐derived, tetraethyl orthosilicate‐assisted hydrothermal...
Patterned electrodes were developed for use in solid-state lithium-ion batteries, with the ultimate goal to promote fast-charging attributes through improving electrochemically activated surfaces within electrodes. By a conventional photolithography, patterned arrays of SnO2 nanowires fabricated directly on current collector, and empty channel structures formed between resulting customized modifying size interval patterns. The composite electrolyte comprising Li7La3Zr2O12 poly(ethylene...
The increasing interest in flexible and wearable electronics has demanded a dramatic improvement of mechanical robustness electronic devices along with high-resolution implemented architectures. In this study, site-specific stress-diffusive manipulation is demonstrated to fulfill highly robust ultraflexible amorphous indium-gallium-zinc oxide (a-IGZO) thin-film transistors (TFTs) integrated circuits. photochemically activated combustion sol-gel a-IGZO TFTs on mesa-structured polyimide show...
Self refresh current in modern DRAMs is becoming more difficult problem to handle because the decreasing cell transistor size has a negative effect on uniformity of capacitor charge. In order solve this issue, adaptive self refresh(ASR) scheme been developed. A dual period based performed ASR reduce power dissipation using row register information. The information adaptively modified according data retention characteristics. When DRAM enters mode, only rows which were activated for write are...
The oxygen vacancies in the TiOx active layer play key role determining electrical characteristics of TiOx-based memristors such as resistive-switching behaviour. In this paper, we investigated effect a multi-layer stacking sequence layers on memristor devices. particular, sub-layers, which have different contents, was varied. optimal condition confirmed by measuring current-voltage characteristics, and also retention test that were maintained for more than 10,000 s. Finally, simulation...
Periodic multilayer thin-film color filters (CFs) entirely made of nano-porous indium-tin-oxide (ITO) with tunable refractive index are explored. The interference CFs electrically conductive and transmit light in the pass-band spectral region without absorbing outside region. transfer matrix method, implemented conjunction a genetic algorithm optimization is used to design optimal thickness layers for red, green, blue (RGB) filters. RGB 2 pairs (4 layers) experimentally demonstrated by using...
Recently, millimeter-wave (mmWave) communications have received great attention due to the availability of large spectrum resources. Nevertheless, their impact on TCP performance has been overlooked, which is observed that said collapse occurs owing significant difference in signal quality between LOS and NLOS links. We propose a novel design for mmWave communications, enhancing proxy (mmPEP), enabling not only overcome but also exploit properties channels. The base station installs operate...