A5101818678- Advancements in Battery Materials
- Electronic and Structural Properties of Oxides
- Advancements in Solid Oxide Fuel Cells
- Tensor decomposition and applications
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Magnetic and transport properties of perovskites and related materials
- Conducting polymers and applications
- Graphene research and applications
- Electrocatalysts for Energy Conversion
- Computational Physics and Python Applications
- Advanced Memory and Neural Computing
- biodegradable polymer synthesis and properties
- Sparse and Compressive Sensing Techniques
- Welding Techniques and Residual Stresses
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Semiconductor materials and devices
- Perovskite Materials and Applications
- Catalytic Processes in Materials Science
- Advanced Neuroimaging Techniques and Applications
- Technology and Data Analysis
- Transition Metal Oxide Nanomaterials
- Electrospun Nanofibers in Biomedical Applications
Korea Institute of Energy Research
2016-2025
Kyung Hee University
2024
Hoseo University
2002-2023
Korea Institute of Machinery and Materials
2023
Yonsei University
2022
Daejeon University
2021
Government of the Republic of Korea
2017-2021
University of Wisconsin–Madison
2020-2021
Korea Advanced Institute of Science and Technology
2021
Seoul National University
2019
Planar perovskite solar cells (PSCs) fabricated by intramolecular exchange with PbI2(DMSO) and PbI2(NMP) complexes the high performance of these are described. Their films easily deposited a one-step spray-coating were effectively converted into high-quality FAPbI3-based layers. PbI2(NMP)-derived PSCs yielded power conversion efficiency as 19.5%, higher than that PbI2(DMSO)-derived PSCs. As service to our authors readers, this journal provides supporting information supplied authors. Such...
Abstract Protonic ceramic electrochemical cells (PCECs) hold great promise as an energy conversion and storage technology at lower temperatures (400–650 °C). However, the sluggish reaction kinetics oxygen electrode hinder activity of PCECs. Herein, a series bifunctional electrodes based on bimetal‐doped BaCoO 3‐𝛿 (BCO) are reported. Doping hampers hexagonal perovskite formation transforms BCO into cubic perovskite, improving water uptake hydration abilities. Density functional theory...
Microsupercapacitors are microscale rechargeable energy storage devices that can support or replace batteries in ultrasmall electronic devices. Although the use of high-capacitive, two-dimensional materials is promising, other methods needed to reach a high capacitance and density, which cannot be achieved by fully utilizing surface electrode materials. Here, we introduce an effective strategy control geometry interdigital microelectrodes for achieving ultrahigh edge effect in-plane...
Substantial Fe substitution into a vanadium-based NASICON cathode is demonstrated to boost performance and materialize superior sodium ion battery.
Developing of high-energy, high-power-density energy storage devices is challenging. Despite being promising electrode materials for these devices, metal–organic frameworks (MOFs) have poor electrical conductivity and weak ligand–metal coordination. Here, the highly conductive MOF, Ni3(HITP)2, which comprises radially oriented microspheres, adopted as anode Li-ion capacitors (LICs). The half-cell demonstrates high reversible capacity (834 mAh g−1) at 50 mA g−1 with minimal reduction,...
Ice, one of the most enigmatic materials on Earth, exhibits diverse polymorphism, with research mainly focusing commonly observed phases: hexagonal ice (Ih), cubic (Ic), and stacking-disordered (Isd). While their formation or structural changes are crucial for advancements in cloud science, climate modeling, cryogenic technology, molecular mechanisms driving these phenomena remain unexplored. Herein, utilizing transmission electron microscopy, we investigate at two different temperatures,...
A perovskite La<sub>0.2</sub>Sr<sub>0.8</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3−δ</sub> catalyst exhibited remarkably high activities for the ORR and OER as a novel bifunctional oxygen electrode reversible SOCs.
Advanced transmission electron microscopy analysis uncovers the fundamental mechanisms behind nanometer-scale interfacial degradation phenomena in high-temperature solid oxide electrolysis cells.
Abstract Direct formic acid fuel cells (DFAFCs) stand out for portable electronic devices owing to their ease of handling, abundant availability, and high theoretical open circuit potential. However, the practical application DFAFCs is hindered by unsatisfactory performance electrocatalysts sluggish anodic oxidation reaction (FAOR). Palladium (Pd) based nanomaterials have shown promise FAOR due highly selective mechanism, but maintaining electrocatalytic durability remains challenging. In...
We describe a novel and versatile approach for preparing resistive switching memory devices based on binary transition metal oxides (TMOs). Titanium isopropoxide (TIPP) was spin-coated onto platinum (Pt)-coated silicon substrates using sol−gel process. The sol−gel-derived layer converted into TiO2 film by thermal annealing. A top electrode (Ag electrode) then coated the films to complete device fabrication. When an external bias applied devices, phenomenon independent of voltage polarity...
Magnetic nanocomposite multilayers including magnetic nanoparticles are prepared using a nucleophilic substitution reaction between 2-bromo-2-methylpropionic acid (-BMPA) and amino (-NH2) groups. The assembly of in nonpolar solvent induces densely packed adsorption, which significantly enhances the nonvolatile memory properties films. Detailed facts importance to specialist readers published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made...
The properties of enzymes, which can cause reversible changes in currents through redox reactions solution, are fundamental and practical importance bio-electrochemical applications. These enzymes often associated with their charge-trap sites. Here, we demonstrate that resistance dried lysozyme (LYS) films be generated by an externally applied voltage as a result charge trap/release. Based on such changes, LYS used resistive switching active material for nonvolatile memory devices. In this...
Co<sub>3</sub>O<sub>4</sub> nanograins-interconnected secondary particle (Co<sub>3</sub>O<sub>4</sub> NISP) is proposed as lithium-ion battery anode material that can offer high volumetric capacity by less formation of insulating CoO during lithiation process.
A rechargeable aluminum-ion battery based on chloroaluminate electrolytes has received intense attention due to the high abundance and chemical stability of aluminum. However, fundamental intercalation processes dynamics in these systems remain unresolved. Here, energetics ion atomically thin single crystal graphite are investigated by fabricating mesoscopic devices for charge transport operando optical microscopy. These measurements compared high-performance Al-based consisting a few-layer...
Abstract The surging demand for sustainable energy has spurred intensive research into electrochemical conversion devices such as fuel cells, water splitting, and metal‐air batteries. performance of oxygen electrocatalysts significantly impacts overall efficiency. Recently, spinel oxides (AB 2 O 4 ) have emerged promising candidates; however, the scarcity prior studies underscores need a thorough comprehensive exploration. This study presents computational framework that integrates machine...
Using density functional theory (DFT) within the local approximation (LDA), we calculate physical and electronic properties of ${\text{PbTiO}}_{3}$ (PTO) a series hypothetical compounds ${\text{PbTiO}}_{3\ensuremath{-}x}{\text{S}}_{x}$ $x=0.2$, 0.25, 0.33, 0.5, 1, 2, 3 arranged in corner-sharing cubic perovskite structure. We determine that replacing apical oxygen atom PTO tetragonal unit cell with sulfur reduces $x=0$ LDA calculated band gap 1.47 eV to 0.43--0.67 for $x=0.2$--1 increases...