A5036622942- Membrane Separation and Gas Transport
- Membrane Separation Technologies
- Fuel Cells and Related Materials
- Graphene research and applications
- Membrane-based Ion Separation Techniques
- Synthesis and properties of polymers
- Covalent Organic Framework Applications
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Graphene and Nanomaterials Applications
- Advancements in Battery Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Battery Technologies Research
- Nanopore and Nanochannel Transport Studies
- Advanced Battery Materials and Technologies
- Carbon Dioxide Capture Technologies
- Supercapacitor Materials and Fabrication
- Zeolite Catalysis and Synthesis
- Muon and positron interactions and applications
- Advanced Photocatalysis Techniques
- Polymer Surface Interaction Studies
- Advanced Sensor and Energy Harvesting Materials
- Extraction and Separation Processes
- Conducting polymers and applications
- Ionic liquids properties and applications
Hanyang University
2016-2025
Anyang University
2016-2024
Seoul Institute
2017
University at Buffalo, State University of New York
2016
Google (United States)
2015
Korea Atomic Energy Research Institute
2010
The University of Texas at Austin
2006-2009
University of Ulsan
2008
Korea Institute of Energy Research
2008
Materials Science & Engineering
2007
Graphene is a distinct two-dimensional material that offers wide range of opportunities for membrane applications because ultimate thinness, flexibility, chemical stability, and mechanical strength. We demonstrate few- several-layered graphene oxide (GO) sheets can be engineered to exhibit the desired gas separation characteristics. Selective diffusion achieved by controlling flow channels pores via different stacking methods. For layered (3- 10-nanometer) GO membranes, tunable transport...
Within a polymer film, free-volume elements such as pores and channels typically have wide range of sizes topologies. This broad element compromises polymer's ability to perform molecular separations. We demonstrated structures in dense vitreous polymers that enable outstanding ionic transport separation performance surpasses the limits conventional polymers. The unusual microstructure these materials can be systematically tailored by thermally driven segment rearrangement. Free-volume...
Global CO2 emissions have increased steadily in tandem with the use of fossil fuels. A paradigm shift is needed developing new ways by which energy supplied and utilized, together mitigation climate change through reduction technologies. There an almost universal acceptance link between rising anthropogenic levels due to fuel combustion global warming accompanied unpredictable change. Therefore, renewable energy, non-fossil fuels capture storage (CCS) must be deployed on a massive scale. CCS...
ABSTRACT Currently, there is great interest in graphene‐based devices and applications because graphene has unique electronic material properties, which can lead to enhanced performance. Graphene may be used a wide variety of potential from next‐generation transistors lightweight high‐strength polymeric composite materials. Graphene, atomic thickness two‐dimensional sizes the tens micrometer range or larger, also been considered promising nanomaterial gas‐ liquid‐barrier perfect sheets do...
Material surface engineering has attracted great interest in important applications, including electronics, biomedicine, and membranes. More recently, dopamine been widely exploited solution-based chemistry to direct facile modification. However, unsolved questions remain about the chemical identity of final products, their deposition kinetics binding mechanism. In particular, oxidation reaction is a key improving modification efficiency. Here, we demonstrate that high O(2) concentrations...
Proton-exchange-membrane water electrolysis (PEMWE) requires an efficient and durable bifunctional electrocatalyst for the hydrogen evolution reaction (HER) oxygen (OER). Herein, Ir-based is designed using high entropy alloy (HEA) platform of ZnNiCoIrX with two elements (X: Fe Mn). A facile dealloying in vacuum system enables construction a nanoporous structure crystallinity Zn as sacrificial element. Especially, Mn incorporation into HEAs tailors electronic Ir site, resulting d-band center...
Abstract Highly permselective and durable membrane materials have been sought for energy‐efficient C 3 H 6 /C 8 separation. Mixed‐matrix membranes (MMMs) comprising a polymer matrix metal–organic frameworks (MOFs) are promising candidates this application; however, rational matching of filler‐matrix is challenging their separation performances need to be further improved. Here, we propose novel strategy “defect engineering” in MOFs as an additional degree freedom design advanced MMMs. MMMs...
Integrating different modification strategies into a single step to achieve the desired properties of metal-organic frameworks (MOFs) has been very synthetically challenging, especially in developing advanced MOF/polymer mixed matrix membranes (MMMs). Herein, we report polymer-MOF (polyMOF) system constructed from carboxylated polymer with intrinsic microporosity (cPIM-1) ligand. This intrinsically microporous ligand could coordinate metals, leading ~100 nm-sized polyMOF nanoparticles....
Abstract Roll‐to‐roll dry processing enables the manufacture of high energy density and low cost Li‐ion batteries (LIBs). However, as thickness electrode fabricated by becomes greater (≥10 mAh cm −2 ), migration resistance ( R ion ) charge‐transfer ct in dramatically increase due to long diffusion lengths for electron. Therefore, it is important reduce achieve LIBs. The with a areal capacity 10 can be achieved following three characteristics. First, fibrillization behavior...
Get the salt out: Conventional polyamide desalination membranes suffer from low chlorine tolerance, leading to short membrane life. Using newly synthesized sulfonated copolymers prepared by direct copolymerization of disulfonated monomer, chlorine-tolerant (see picture) showing high flux and rejection were developed.
The precise impedance measurement system based on the well-known two-probe and four-probe methods was prepared to measure consequent proton conductivity of Nafion membranes as standard samples, considering not only number electrodes bridging but also elimination electrical error sources for analysis. conductivities are reported discussed in present study with respect different cell configurations conditions. values measured using method were always higher (2−5 times) than those at ambient...
This paper reports a new polyimide design with high internal free volume elements for fast mass transport simultaneously selectivity. Here, we show that the polymer using three-dimensional rigid molecular structure having void space can lead to formation of fractional proper cavity size separate small gas molecules selectivities as permeabilities. These findings could strongly impact emerging separation applications polymeric membranes such natural purification and biogas get clean energy resources.