A5073171145- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Extraction and Separation Processes
- Nuclear Physics and Applications
- Advanced battery technologies research
- Conducting polymers and applications
- Radioactive element chemistry and processing
- Molten salt chemistry and electrochemical processes
- Radioactive contamination and transfer
- Polyoxometalates: Synthesis and Applications
- Nuclear Materials and Properties
- Transition Metal Oxide Nanomaterials
- Chemical Synthesis and Characterization
- Graphite, nuclear technology, radiation studies
- Advanced Sensor and Energy Harvesting Materials
- Fault Detection and Control Systems
- Educational Research and Pedagogy
- Nuclear materials and radiation effects
- Mesoporous Materials and Catalysis
- Isotope Analysis in Ecology
- Semiconductor materials and devices
- Rare-earth and actinide compounds
- Radiation Detection and Scintillator Technologies
Kyonggi University
2015-2024
Government of the Republic of Korea
2017
Korea Atomic Energy Research Institute
2004-2016
Pohang University of Science and Technology
1997-2014
Indiana State University
2012-2013
Pohang Accelerator Laboratory
1998-2012
University at Buffalo, State University of New York
2009
University of California, Berkeley
2006
Electronics and Telecommunications Research Institute
2002-2006
Lawrence Berkeley National Laboratory
2006
Surface coating is essential for the cathode materials applied in all-solid-state batteries (ASSBs) based on sulfide electrolytes because of instability cathode/sulfide interface. In contrast with those general lithium ion (LIBs) using a liquid electrolyte, ASSBs require different functional properties such as high ionic conductivity, low reactivity electrolytes, and electronic conductivity. addition to LiNbO3, which most popular material ASSBs, LiTaO3 another highly promising material, both...
Both particle monodispersity and mesopore orientation have been considered in this work. Monodisperse spherical silica particles with a solid core mesoporous shell featuring channels perpendicular to the surface were synthesized for first time by adopting as component employing Cn-TAB (n = 12, 14, 16, 18), structure-directing agent shell. Micelles on of are formed from electrostatic interaction between partially negatively charged positively surfactant molecules under basic conditions. The...
The poor electrochemical performance of all solid-state batteries (ASSBs) that use sulfide electrolytes can be attributed to undesirable side reactions at the cathode/sulfide-electrolyte interface; this issue addressed via surface coating. Ternary oxides such as LiNbO3 and Li2ZrO3 are generally used coating materials because their high chemical stabilities ionic conductivities. However, relative cost discourages in mass production. In study, Li3PO4 was introduced a material for ASSBs,...
Nanocrystalline Li[NixLi(1−2x)/3Mn(2−x)/3]O2 powders were prepared by a simple combustion method and investigated using X-ray diffraction (XRD), absorption spectroscopy (XAS), scanning electron microscopy (SEM), particle size analysis (PSA), galvanostatic charge/discharge cycling. According to the XRD analysis, single-phase compounds with layered structure obtained for 0 ≤ x 0.25, while mixtures 0.30 0.50. Rietveld revealed that is basically rock-salt in which small amount of Ni occupies 3a...
Three types of Co3O4 nanoparticles are synthesized and characterized as a catalyst for the air electrode Li/air battery. The shape size observed using scanning electron microscopy transmission analyses. formation phase is confirmed by X-ray diffraction. electrochemical property electrodes containing significantly associated with nanoparticles. It appears that capacity villiform-type superior to cube- flower-type This probably due sufficient pore spaces
We introduce CsI as a multifunctional redox mediator to enhance the performance of Li–air batteries. dissolved in electrolyte is ionized into Cs+ and I–, which perform their roles Li anode air electrode, respectively. The I– ions facilitate dissolution Li2O2 electrode mediator, reduces overpotential cell. low also leads suppression parasitic reactions occurring high-voltage range, such decomposition reaction between carbon. At same time, act an electrostatic shield at sharp points anode,...
Abstract We propose PEDOT:PSS as a multi-functional composite material for an enhanced Li-air-battery air electrode. The layer was coated on the surface of carbon (graphene) using simple method. A electrode containing PEDOT:PSS-coated graphene (PEDOT electrode) could be prepared without binder (such PVDF) because high adhesion PEDOT:PSS. PEDOT presented considerable discharge and charge capacity at all current densities. These results shows that acts redox reaction matrix conducting in...
Li-rich layered oxide has been known to possess high specific capacity beyond the theoretical value from both charge compensation in transition metal and oxygen redox reaction. Although it could achieve higher reversible due anion participating electrochemical reaction, however, its use energy storage systems limited. The reason is irreversible reaction that occurs during initial cycle, resulting structural instability evolution phase transition. To suppress we introduced surface-modified...
The structural and electrochemical properties of amorphous FePO4·xH2O (x = 2, 1, 0) hexagonal FePO4 powders have been investigated using differential thermal analysis–thermogravimetry (DTA–TGA), X-ray diffractometry (XRD), absorption spectroscopy (XAS), scanning electron microscopy (SEM), cyclic voltammetry (CV), charge/discharge cycling. On heating, FePO4·2H2O was transformed into at 380 °C, through FePO4·H2O phases. Reversible lithium insertion extraction from the occurred 2.8 3.2 V vs....
0.17, 0.20, 0.25, 0.33, and 0.5) compounds were prepared using a simple combustion method studied by the X-ray diffraction method, electrochemical techniques, absorption near-edge structure (XANES) analysis. The Rietveld analysis showed that these could be classified as type. Both c parameters decreased linearly, while increased with increase of Co content. oxidation states Mn ion in refined 4+ 3+, respectively, XANES Irreversible voltage plateaus observed initial charge profile compounds,...
A carbon nanotube [CNT]/Co3O4 composite is introduced as a catalyst for the air electrode of lithium-air [Li/air] batteries. Co3O4 nanoparticles are successfully attached to sidewall CNT by hydrothermal method. high discharge capacity and low overvoltage indicate that CNT/Co3O4 very promising Li/air
Abstract The development of efficient bifunctional catalysts for the oxygen reduction reaction (ORR) and evolution (OER) is a key issue pertaining high performance Li–O 2 batteries. Here, we propose heterogeneous electrocatalyst consisting LaMnO 3 nanofibers (NFs) functionalized with RuO nanoparticles (NPs) non‐oxidized graphene nanoflakes (GNFs). cell employing tailored delivers an excellent electrochemical performance, affording significantly reduced discharge/charge voltage gaps (1.0 V at...