A5059734794- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Semiconductor materials and interfaces
- Extraction and Separation Processes
- Electromagnetic wave absorption materials
- Semiconductor materials and devices
- Graphene research and applications
- Advanced MIMO Systems Optimization
- Engineering Applied Research
- Advanced Wireless Communication Techniques
- Conducting polymers and applications
- Electric Power System Optimization
- Wireless Communication Networks Research
- Aluminum Alloys Composites Properties
- Fiber-reinforced polymer composites
- Electron and X-Ray Spectroscopy Techniques
- Advanced battery technologies research
- Smart Grid Energy Management
- Cooperative Communication and Network Coding
- Advanced Antenna and Metasurface Technologies
- Material Properties and Applications
- Magnetic Properties and Synthesis of Ferrites
- Fuel Cells and Related Materials
Chungnam National University
2016-2025
Korea Electronics Technology Institute
2023
John Wiley & Sons (United States)
2023
Korea Institute of Science and Technology
2011-2021
Korea Polytechnic University
2005-2020
Samsung (South Korea)
2005-2020
Chungbuk National University
1997-2020
Nazarbayev University
2019
Kangwon National University
2018
Government of the Republic of Korea
2015
The interfacial origin of performance improvement and fade high-voltage cathodes LiNi0.5Co0.2Mn0.3O2 for high-energy lithium-ion batteries has been investigated. Performance was achieved through stabilization using 5 wt % methyl (2,2,2-trifluoroethyl) carbonate (FEMC) fluorinated linear as a new electrolyte additive. Cycling with the FEMC additive at 3.0–4.6 V versus Li/Li+ results in formation stable solid interface (SEI) layer effective passivation cathode surface, leading to improved...
This review provides a summary of the progress in research on various Si-based thin films as anode materials for lithium-ion batteries. The lithiation mechanism models, different types from pure monolithic Si film to three-dimensional structured composite films, effect liquid and solid-state electrolytes performance were considered available preparation techniques discussed. A table summarizing important information such systems including features, methods conditions, electrochemical test...
Increasing demands on high-data-rate and low-latency cellular communications are accelerating the developments of millimeter-wave (mm-wave) systems for 5G NR in 28 39GHz bands. In order to provide communication worldwide, high-performance low-cost RF chipset solutions required. Recently, mm-wave CMOS/BiCMOS phased-array transceivers 28GHz band have been reported [1]–[5]. However, there very limited reports [6], which is one main frequency bands US, Canada, China other countries. this paper,...
The development of high‐energy and high‐power density sodium‐ion batteries is a great challenge for modern electrochemistry. main hurdle to wide acceptance lies in identifying developing suitable new electrode materials. This study presents composition‐graded cathode with average composition Na[Ni 0.61 Co 0.12 Mn 0.27 ]O 2 , which exhibits excellent performance stability. In addition the concentration gradients transition metal ions, composed spoke‐like nanorods assembled into spherical...
Biomass-derived hard carbon (HC) has attracted much attention as a promising electrode material for sodium-ion batteries (SIBs) due to its unique properties such high porosity, large surface area and adjustable pore size distribution. This work presents the results of electrochemical studies HC derived from buckwheat seeds. The HCs were preoxidized at 300 °C synthesized using pyrolysis method in range 600–1400 °C. It was found that characteristics anodes are strongly dependent on morphology...
The discharge capacities of spinel-type cells charged in electrolytes with solid electrolyte interphase (SEI)-forming additives are investigated after being stored at . presence Mn deposits on the anode surface, which is responsible for capacity fading cells, clearly shown by means open-circuit voltage, ex situ X-ray diffraction, and energy-dispersive spectrometry measurements. Unlike fluoroethylene carbonate, using vinylene carbonate as an SEI former leads to a noticeable improvement...
The effect of carbon coating on the interfacial charge transfer resistance natural graphite (NG) was investigated by a single-particle measurement. microscale carbon-coated (NG@C) particles were synthesized simple wet-chemical mixing method using phenolic resin as source. electrochemical test results NG@C conventional composite electrodes demonstrated desirable rate capability, cycle stability, and enhanced kinetic property. Moreover, improvements in confirmed with parameters (i.e.,...
Abstract Lithium difluoro(bisoxalato)phosphate (LiDFBP) is introduced as a novel lithium‐salt‐type electrolyte additive for lithium‐rich cathodes in lithium‐ion batteries. The investigation reveals that LiDFBP oxidized to form uniform and electrochemically stable solid interphase (SEI) on the cathode. LiDFBP‐derived SEI layer effectively suppresses severe decomposition at high voltages mitigates voltage decay of caused by undesirable phase transformation spinel‐like phases during cycling....
This study examines tungsten (W) doping in NCM811 cathodes via bulk (co-precipitation) and surface (solid-state) methods. W enhances charge transfer stabilizes structure, reducing capacity fade (retain 92% after 500 cycles).
We investigated electrochemical performance of natural graphite surface-treated with aluminum compared to that untreated graphite. Aluminum triethoxide was used as the treatment source. In process, drying temperature has critical influence on treated samples. The surface property samples by scanning electron microscopy and Raman spectroscopy. vibration mode sample sharpened shifted upward, whereas no remarkable changes were found in mode. improved markedly Al treatment. impedance measurement...
Abstract Ink‐jet printed metal nanoparticle films have been shown to anneal at high temperatures (above 500 °C) highly conductive on glass or ceramic substrates, but they suffer from cracking and inadequate substrate adhesion. Here, we report printable materials, with added nanosized frit that can be annealed °C form a crack‐free dense microstructure adheres well substrates. This overcomes the previous challenges while still retaining desired film conductivity. Controlling particle...