Ji-Yong Eom

ORCID: 0000-0003-0824-6585
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About
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Research Areas
  • Advancements in Battery Materials
  • Advanced Battery Technologies Research
  • Advanced Battery Materials and Technologies
  • Supercapacitor Materials and Fabrication
  • Extraction and Separation Processes
  • Transition Metal Oxide Nanomaterials
  • Graphene research and applications
  • Semiconductor materials and interfaces
  • Carbon Nanotubes in Composites
  • Electron and X-Ray Spectroscopy Techniques
  • Fuel Cells and Related Materials
  • Catalytic Processes in Materials Science
  • Electrodeposition and Electroless Coatings
  • Electrical Contact Performance and Analysis
  • Advanced battery technologies research
  • MXene and MAX Phase Materials
  • Radiation Effects in Electronics
  • Recycling and Waste Management Techniques

Korea Automotive Technology Institute
2014-2021

Pennsylvania State University
2012-2019

Government of the Republic of Korea
2015-2019

Soon Chun Hyang University Cheonan Hospital
2015-2019

Samsung (South Korea)
2011

Samsung (United States)
2006-2007

Structurally stabilized Na3V2(PO4)3/C composite cathode materials with excellent electrochemical performance can be obtained by incorporating functional pillar ions into the structure. As ions, K-ions have a larger ionic radius compared to Na-ions, and play an important role in enlarging Na-ion diffusion pathway increasing lattice volume elongating c-axis, thereby improving rate performance. Furthermore, since incorporated rarely participate extraction/insertion reactions, they stabilize...

10.1039/c4ta03948c article EN Journal of Materials Chemistry A 2014-09-08

Black TiO<sub>2−x</sub> nanotube arrays, which are synthesized by an electrochemical method and subsequent thermal conversion in a hydrogen atmosphere, employed as binder-free, free-standing electrodes for high rate Li-ion microbatteries.

10.1039/c5ta01718a article EN Journal of Materials Chemistry A 2015-01-01

We have designed a unique microstructure of graphene embedded LiFePO4 by catalyst assisted self assembly method as cathode material for high power lithium-ion batteries. The stable amide bonds between and were formed the assembly. High conductive provides fast electron transfer path, many pores inside structure facilitate diffusion. fabricated novel shows enhanced cycling performance rate-capability compared with that carbon coated

10.1021/am405335k article EN ACS Applied Materials & Interfaces 2014-03-12

Nanostructured electrodes have recently received great attention as components in lithium rechargeable batteries, especially because of the high power produced by fast kinetic properties these unique structures. Here, we report successful synthesis various nanostructured morphologies spinel manganese oxide (nanorod, nanothorn sphere, and sphere) from a similarly shaped dioxide precursor that was controlled with different aluminium contents hydrothermal method. Among structures, sphere...

10.1039/c1jm10146c article EN Journal of Materials Chemistry 2011-01-01

LiMn2O4, Li1.05Mn1.95O4, and Li1.05Mn1.95O3.95Cl0.05 are prepared by a solution-based process to investigate the influences of codoping Li Cl on electrochemical performance structural stability Li1+xMn2-xO4-yCly (x, y = 0, 0.05). features an improved cycling rate capability compared with LiMn2O4 which originate from reduction in Mn dissolution into electrolyte Cl. The improvement is more appreciable at higher temperature. Further, electrode resistance much lower than that over first charge,...

10.1021/jp310011m article EN The Journal of Physical Chemistry C 2013-02-21

Porous and coarse (5-10 μm) LiFePO₄/C composites with excellent electrochemical performance were synthesized by a growth technology using nanostructured (100-200 nm) LiFePO₄ as seed crystals for the 2nd crystallization process. The porous presented high initial discharge capacity (∼155 mA h g⁻¹ at 0.1 C), superior rate-capability (∼100 5 C, ∼65 % of cycling (∼131 g⁻¹, ∼98 its after 100 cycles 1 C). improvement in was attributed to reaction area resulted from pore tunnels formed inside...

10.1021/am302560m article EN ACS Applied Materials & Interfaces 2013-01-27

We study the structural and electrochemical performance of sulfur cathodes prepared with two different binders, PVdF SBR/CMC. Enhanced battery is observed in SBR/CMC-based electrode its origin scrutinized.

10.1039/c9cc07061c article EN Chemical Communications 2019-01-01

Li metal is considered the ultimate electrode for lithium-ion batteries due to its high specific capacity (3860 mAh g–1) and density (0.534 g cm–3). Despite these advantages, practical use of Li-metal electrodes currently limited by uncontrollable Li-plating stripping, which causes undesirable dendritic growth severe volume changes during cycles. As a solution successful implementation electrodes, we propose herein three-dimensional (3D) integrating 3D Ni foam as current collector via molten...

10.1021/acsaem.0c03042 article EN ACS Applied Energy Materials 2021-02-04

We introduce a new synthesis method to prepare small TiO2 nanoparticles with narrow particle size distribution, which is achieved by electron beam (E-beam) irradiation. The effects of E-beam irradiation on the and electrochemical performance as alternative anode materials for Li-ion batteries are investigated. induced present better cycling rate capability than synthesized normal hydrolysis reaction. attributed resulting in large surface area that provides innumerable reaction sites short...

10.33961/jecst.2015.6.3.75 article EN cc-by-nc Journal of Electrochemical Science and Technology 2015-09-30

The effects of electrodeposition conditions on the cycle performance Sn electrodes were investigated in this study. electrodeposited Cu substrates under different conditions, such as baths and current densities to maximize coulombic efficiency. By using types baths, with phases electrodeposited. formation an η-Cu6Sn5 phase between layer substrate contributes improvement electrode. As density increased, layers became less dense structure nodule-type morphology. morphology exhibited a better...

10.1016/s1452-3981(23)18238-1 article EN cc-by-nc-nd International Journal of Electrochemical Science 2011-08-01

We introduce a new synthesis method to prepare small TiO2 nanoparticles with narrow particle size distribution, which is achieved by electron beam (E-beam) irradiation. The effects of E-beam irradiation on the and electrochemical performance as alternative anode materials for Li-ion batteries are investigated. induced present better cycling rate capability than synthesized normal hydrolysis reaction. attributed resulting in large surface area that provides innumerable reaction sites short...

10.5229/jecst.2015.6.3.75 article EN cc-by-nc Journal of Electrochemical Science and Technology 2015-09-30

Lithium metal is often regarded as the ultimate anode for lithium-ion batteries (LIBs) due to its superior specific capacity (3,860 mAh g -1 ) and density (0.534 cm -3 ). However, real-world application of Li-metal electrodes presently hindered by unregulated Li-plating stripping, leading unwanted dendritic growth significant volume change during cycles. To overcome these challenges, we suggest a three-dimensional (3D) anode, which incorporates 3D Ni foam current collector through molten Li...

10.1149/ma2024-027947mtgabs article EN Meeting abstracts/Meeting abstracts (Electrochemical Society. CD-ROM) 2024-11-22

As demand for electric vehicles increases, interest in cathode materials with high energy density continues to increase. Ni-rich layered NCM811 is a material attracting attention because it can realize density. However, currently available NCM use secondary particles. In the case of commercial NCM811, which has particle shape, cycle-life characteristics rapidly decrease due cracks primary particles constituting Single crystallization used minimize these cracks. Single-crystal cathodes...

10.1149/ma2024-021109mtgabs article EN Meeting abstracts/Meeting abstracts (Electrochemical Society. CD-ROM) 2024-11-22

Multi-walled carbon nanotube (MWNT)/silicon composites with different weight ratios were produced from purified MWNTs and Si powder by high energy ball-milling then electrochemically inserted lithium. The charge/discharge properties for the ball-milled MWNT/Si composite anodes found to be very sensitive ratio of MWNT Si. highest Crev lowest Cirr anode measured 1770 mAh/g 469 mAh g-1 respectively at MWNT0.5/Si0.5. During charging/discharging processes, most Li ions into alloying particles...

10.1149/1.2793583 article EN ECS Transactions 2007-09-28

Sodium-ion rechargeable batteries (SIBs) have attracted great attention as promising next-generation batteries, especially for large-scale energy storage systems (ESS), owing to the natural abundance of Na resources and similarities in their chemical structure reaction mechanism commercial lithium-ion (LIBs). Thus, enormous efforts been made improve electrochemical performance SIBs through development novel cathode materials. According previous literatures, P2-type layered materials suffered...

10.1149/ma2018-01/3/541 article EN Meeting abstracts/Meeting abstracts (Electrochemical Society. CD-ROM) 2018-04-13
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