A5101991575- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Conducting polymers and applications
- Thermal properties of materials
- Graphene research and applications
- Robotic Locomotion and Control
- Advanced Sensor and Energy Harvesting Materials
- Soft Robotics and Applications
- Nanofabrication and Lithography Techniques
- Advanced Thermoelectric Materials and Devices
- Carbon Nanotubes in Composites
- Electrochemical sensors and biosensors
- Advanced Surface Polishing Techniques
- Fuel Cells and Related Materials
- Tribology and Wear Analysis
- Fluid Dynamics and Thin Films
- Electrochemical Analysis and Applications
- Control and Dynamics of Mobile Robots
- Advanced Battery Materials and Technologies
- Robot Manipulation and Learning
- Material Properties and Processing
- Graphene and Nanomaterials Applications
- 2D Materials and Applications
Korea Institute of Industrial Technology
2024
Kyungpook National University
2020-2023
Daegu Gyeongbuk Institute of Science and Technology
2019-2023
Yonsei University
2017-2021
Government of the Republic of Korea
2016-2021
Georgia Institute of Technology
2019-2020
Chung-Ang University
2012-2019
University of Seoul
2015-2018
Institute for Basic Science
2014
Seoul National University
2009
In order to achieve high energy and power densities, a high-voltage asymmetric electrochemical supercapacitor has been developed, with activated carbon (AC) as the negative electrode silicon carbide–MnO2 nanoneedle (SiC–N-MnO2) composite positive electrode. A neutral aqueous Na2SO4 solution was used electrolyte. SiC–N-MnO2 prepared by packing growing MnO2 crystal species in only one direction on carbide surface. AC oxidized thermal treatment introduce oxygen-containing functional groups....
Abstract It is crucial for leaping forward renewable energy technology to develop highly active oxygen evolution reaction (OER) catalysts with fast OER kinetics, and the novel design of high‐performance may come down unveiling origin high catalytic behavior. Herein, a new class heterogeneous electrocatalyst (metallic Co nanoparticles anchored on yttrium ruthenate pyrochlore oxide) provided securing kinetics. In situ X‐ray absorption spectroscopy (in XAS) reveals that kinetics can be achieved...
A higher figure of merit (ZT) can be achieved for tin selenide (SnSe)-based thermoelectric materials by significantly reducing the thermal conductivity (κ) via three promising strategies: substitution with isoelectric atoms, exfoliation nanosheets (NSs) from a bulk ingot, and chemical transformation material into porous structure. Specifically, SnSe1–xSx NSs are prepared ingots hydrothermal Li intercalation subsequent exfoliation. The S atoms SnSe fabrication contribute to scattering phonons...
Silicon carbide microsphere/birnessite-type MnOx (SiC/B-MnOx) composites were prepared by removal of a SiO2 layer with redox deposition birnessite-type for supercapacitor electrode materials. The characterization studies showed that the in composite was homogeneously deposited on SiC surface. capacitive properties as-prepared SiC/B-MnOx electrodes measured three-electrode system using 1 M Na2SO4(aq) as electrolyte. SiC/B-MnOx(6) electrode, fabricated MnOx/SiC feeding ratio 6:1, displayed...
Structure-controlled hybrid catalysts are prepared by carefully controlling the <italic>in situ</italic> exsolution process of metallic pyrochlore oxide for efficient oxygen evolution reaction and hydrogen under alkaline conditions.
Thermoplastic polyurethane (PU) elastomer, prepared from poly(tetramethylene glycol) and methyl diphenyl diisocyanate, was blended with boron nitride (BN) to fabricate a thermally conductive interface material. BN treated by silane coupling agent (BN―NH2) PU-grafted were composite that has better thermal conductivity mechanical strength. The surface-modified filler showed enhanced dispersibility affinity because of the surface treatment functional groups affected free energy, along...
Herein, 3D nanohybrid architectures consisting of MnO2 nanoneedles, carbon nanotubes (CNTs) and graphene sheets are fabricated. Nanostructured ternary hybrid papers in which nanoneedles formed on the outermost layer CNTs intercalated between layers by using amide bonds fabricated direct paper dipping method. The can separate thus create effective surface area is associated with large electrochemically active sites as well form electronic conductive channel inside paper. Moreover, homogeneous...
This work describes the effect of solvents used for solvothermal reactions to synthesize quaternary copper–iron–tin sulfide (Cu 2 FeSnS 4 ) nanosheets that can serve as a potential alternative divergent energy conversion device applications.
Developing nonnoble electrocatalyst-based water-splitting electrodes with high operational stability and low overpotentials is one of the most critical challenges in commercially available reactions. In this study, we present textile enabling remarkably stable operation. We first assembled conductive multi-walled-carbon-nanotubes (MWCNTs) amine molecule-based linkers onto cotton textiles subsequently electrodeposited Ni MWCNT-incorporated textile. For preparation hydrogen evolution reaction...
Graphene–MnO2 composites are reduced from GO–MnO2 using various concentrations of hydrazine hydrate with a fixed reduction time to optimize the concentration obtain excellent electrochemical performance. Changes in oxygen-containing functional groups observed as is varied. These changes affect electrical conductivity and density MnO2 nanoneedles, which impact surface area can significantly supercapacitive The characterization morphology microstructure as-prepared demonstrates that...
Controlling the structure and morphology of porous electrode materials is an effective strategy for realizing high surface area efficient paths ion diffusion.
Al2O3-covered SiC/epoxy composites were prepared using a simple sol–gel method. The results of FE-SEM, TGA, and XPS indicated that the surfaces SiC particles had large, dense, homogenous distribution Al2O3. It was found introduction Al2O3 on surface improved interfacial adhesion between epoxy matrix particles; this resulted in an increase thermal conductivity since boundary resistance at filler–matrix interface decreased. In addition, showed decreased electrical owing to electron tunneling...