A5001539738- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Semiconductor Quantum Structures and Devices
- Atmospheric chemistry and aerosols
- Advanced battery technologies research
- Air Quality and Health Impacts
- Semiconductor Lasers and Optical Devices
- Advanced Sensor and Energy Harvesting Materials
- Radioactivity and Radon Measurements
- Conducting polymers and applications
- Air Quality Monitoring and Forecasting
- ZnO doping and properties
- Synthesis and properties of polymers
- Advanced Semiconductor Detectors and Materials
- Gas Sensing Nanomaterials and Sensors
- Dielectric materials and actuators
- Nuclear Physics and Applications
- Extraction and Separation Processes
- Radioactive contamination and transfer
- Quantum Dots Synthesis And Properties
- GaN-based semiconductor devices and materials
- Electrocatalysts for Energy Conversion
- Silicone and Siloxane Chemistry
Pusan National University
2018-2025
Korea Institute of Energy Research
2023-2024
Chungnam National University
2012-2024
Kyungpook National University
2002-2024
Korea Advanced Institute of Science and Technology
2015-2023
Cornell University
2017-2022
Korea Electrotechnology Research Institute
2022
Seoul National University of Science and Technology
2021
Laboratoire Albert Fert
2020
Université Paris-Saclay
2020
Abstract Uncontrolled growth of insulating lithium sulfide leads to passivation sulfur cathodes, which limits high utilization in lithium-sulfur batteries. Sulfur can be augmented electrolytes based on solvents with Gutmann Donor Number; however, violent metal corrosion is a drawback. Here we report that particulate achieved using salt anion donor number, such as bromide or triflate. The use ~95 % by suppressing electrode passivation. More importantly, the high-donor-number anions are...
A series of composite polymer electrolytes containing poly(ethylene glycol)-grafted graphene oxide fillers were prepared for all-solid-state lithium-ion battery applications.
Owing to the natural abundance of sodium resources and their low price, next-generation batteries employing an Na metal anode, such as Na–O2 Na–S systems, have attracted a great deal interest. However, poor reversibility electrode during repeated electrochemical plating stripping is major obstacle realizing rechargeable batteries. It mainly originates from dendrite formation exhaustive electrolyte decomposition due high reactivity metal. Herein, we report free-standing composite protective...
Abstract Minimizing electrolyte use is essential to achieve high practical energy density of lithium–sulfur (Li–S) batteries. However, the sulfur cathode more readily passivated under a lean condition, resulting in low utilization. In addition, continuous decomposition on Li metal anode aggravates problem, provoking rapid capacity decay. this work, dual functionalities NO 3 − as high‐donor‐number (DN) salt anion presented, which improves utilization and cycling stability lean‐electrolyte...
Interfacial stability is one of the crucial factors for long-term cyclability lithium (Li) metal batteries (LMBs). While cross-contamination phenomena have been well-studied in Li-ion (LIBs), similar rarely reported LMBs. Here, we investigated cathode failure triggered by chemical crossover from anode In contrast to LIBs, LMBs suffers more significant capacity fading, and its cannot be fully recovered replacing Li anode. In-depth surface characterization reveals severe deterioration related...
Gel polymer electrolytes (GPEs) based on semi-interpenetrating network (IPN) structure for lithium-ion batteries were prepared by mixing boron-containing cross-linker (BC) composed of ethylene oxide (EO) chains, cross-linkable methacrylate group, and anion-trapping boron moiety with poly(vinylidene fluoride) (PVDF) followed ultraviolet light-induced curing process. Various physical electrochemical properties the GPEs systematically investigated varying EO chain length content. Dimensional...
Abstract This work reports a new class of liquid crystal elastomers (LCEs) cross‐linked with poly(ether‐thiourea) comprising triethylene glycol spacer (LCE‐TUEG) wherein thiourea bonds impart hydrogen bonding capability as well permit dynamic covalent bond (DCB) exchange at elevated temperatures. While enhances the mechanical properties LCE‐TUEG, DCB allows macromolecular network rearrangement LCEs, resulting in various useful that are not present conventional including ability to undergo...
Abstract Cholesteric liquid crystal elastomers (CLCEs) are unique anisotropic rubbers that can change their structural color in response to various stimuli such as heat, chemicals, electric fields, and mechanical stress. Methods deswelling surface alignment have been adopted prepare CLCEs; however, they limitations creating spatially controlled CLCE geometries. In this work, a direct ink writing (DIW)‐based 3D‐printable be prepared by extruding viscous CLC is developed through 3D printer...
The pulverization of lithium metal electrodes during cycling recently has been suppressed through various techniques, but the issue irreversible consumption electrolyte remains a critical challenge, hindering progress energy-dense batteries. Here, we design single-ion-conductor-based composite layer on electrode, which significantly reduces liquid loss via adjusting solvation environment moving Li+ in layer. A Li||Ni0.5Mn0.3Co0.2O2 pouch cell with thin (N/P 2.15), high loading cathode (21.5...
We demonstrate that the internal short (IS) approach is a fast and efficient process for lithium pre-doping in lithium-ion capacitors.
Hybrid ionogels fabricated using 1 M LiTFSI in <italic>N</italic>-butyl-<italic>N</italic>-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) crosslinked with ladder-like structured poly(methacryloxypropyl)silsesquioxane (LPMASQ) were investigated as high temperature ionogel electrolytes for lithium ion batteries.
Core–shell silica particles with ion-conducting poly(ethylene glycol) and anion-trapping boron moiety in the shell layer were prepared to be used as fillers for polymer composite electrolytes based on organic/inorganic hybrid branched copolymer matrix all-solid-state lithium-ion battery applications. The core–shell found improve mechanical strength thermal stability of increase compatibility between filler matrix. Furthermore, increases both ionic conductivity lithium transference number...
For the first time, an inorganic-organic hybrid polymer binder was used for coating of composites on separators to enhance thermal stability and prevent formation lithium dendrite in metal batteries. The fabricated hybrid-composite-coated exhibited minimal shrinkage compared with previous composite (<5% change dimension), maintenance porosity (Gurley number ∼400 s/100 cm(3)), high ionic conductivity (0.82 mS/cm). Lithium battery cell examinations our revealed excellent C-rate cyclability...