Sung-Wook Kim (김성욱)
Sung-Wook Kim (김성욱)
Post Doctoral
Post Doctoral
Green Hydrogen Production
Green Hydrogen Production
Photoelectrochemical (PEC) cells are useful devices designed for the chemical process of generating hydrogen via electrolysis of water, namely water splitting, under irradiation of a broad spectrum of sunlight. In general, PEC devices are composed of photoelectrodes, where oxidation/reduction of water occurs with response to sunlight, and appropriate aqueous electrolytes containing a redox couple.
Solar Desalination
Solar desalination is a promising eco-friendly and inexpensive way to obtain fresh water from sea water utilizing solar energy. This technology has attractive advantages as it combines the most abundant resources on Earth: water and solar energy. As evaporation is a surface phenomenon, solar desalination is based on interfacial evaporation principle using photoabsorber which is same to natural evaporation.
Zinc-ion Batteries
Rechargeable aqueous zinc-ion batteries (ZIBs) are one of the promising energy storage devices because of its safety, high energy density, low-cost and non-toxicity. Zinc metal has a moderate redox potential of -0.76 V vs. SHE and a high theoretical capacity of 820 mAh/g, which ensures attractive electrochemical properties for anode part of battery system.
Synthesis of 2D Material
Graphene is a material composed of pure carbon atoms, arranged in a regular hexagonal pattern. Graphene can be described as a one-atom thick layer of the mineral graphite (many layers of graphene stacked together effectively form crystalline flake graphite). It has drawn a lot of attention due to its great properties such as high optical transmittance, excellent electrical conductivity, high flexibility, and large theoretical surface area, and great mechanical stability.
EUV Photoresist
Extreme Ultra Violet (EUV) lithography is the promising technique of next-generation semiconductors for continuation of Moore's law. However, existing chemically amplified resists have some limits because of poor pattern transfer and pattern collapse. Therefore, the development on photorsists with high photon adsorption and moderate etch selectivity is needed for EUV lithography.
Hybrid Supercapacitors
Hybrid supercapacitors are promising candidates for next-generation energy storage devices as substitutes for conventional batteries. The devices can furnish excellent specific energy/power density, enabling faster charging/discharging rates, prolonged cycle life, and substantial temperature tolerance compared to batteries. Furthermore, the devices, which can store energy via electric double layer (EDL), cation/anion intercalation, faradaic transfer and so on, have various strategies for commercialization and realization.
1D, 2D, 3D Nano-periodic Structure
Holographic Interference Lithography (HIL) is a fast and efficient technique that allows one to create 1D, 2D and 3D (Three-Dimensional) nano-periodic structures with large-area and defect-free coverage. Additionally, this technique offers increased control over cell geometry and volume fraction. Because of many advantages that IL offers for 3D fabrication, it became subject of very active investigations in recent years.