Hanyang University · Engineering
Professor Won Cheol Yoo's research lab specializes in the design and synthesis of advanced functional materials for energy and environmental applications. Key research directions include the development of hierarchical porous materials—such as zeolites, mesoporous silica, and metal-organic frameworks—through templated and confined synthesis strategies, with a focus on controlling morphology and mass transport. The lab also pioneers innovative electrode architectures by integrating conductive carbon matrices with MOFs and doped carbons to enhance electrochemical performance in supercapacitors and fuel cells. Additionally, the group explores ionogels and solid electrolytes to optimize ion transport in energy storage devices.
Figures are computed from collected data and may differ slightly.
The effects of confinement on the morphological development of the zeolite silicalite-1 were studied during hydrothermal synthesis in three-dimensionally ordered macroporous (3DOM) carbon monoliths. By scheduling multiple infiltration/hydrothermal reaction (IHT) steps using precursor solutions with high (H) or low nutrient content (L) in specific sequences, it was possible to obtain various zeolite morphologies of interest for technological applications. The special morphologies are also functio
MFI zeolite membranes with high flux and high separation factors for xylene isomer separation were fabricated by combining several unique processing steps. These include 1) use of brittle seeds prepared by confined synthesis, 2) rubbing and leveling methods to obtain randomly oriented seed layers, 3) secondary hydrothermal growth to produce thin zeolite films, and 4) rapid thermal processing to remove structure-directing agents while minimizing crack formation (see picture; scale bar 500 nm). De
ORR activity of Fe, Si, and N co-doped carbons (FeSiNCs) is first reported that DFT calculations reveal the origin of the ORR activity of FeSiNC, presenting excellent ORR activity and single-cell performances in Zn–air battery and AEMFC.
Abstract Ionic liquids (ILs) or solidified ionic liquids, known as ionogels, have been actively employed in supercapacitors (SCs) owing to their superior electrochemical stabilities to aqueous and organic electrolytes. However, initial efforts of using ILs and ionogels in SCs were not successful because bulky and sluggish ions cannot effectively access tiny pores of conventional microporous carbons. To address this, a strategy is developed to optimize the electrochemically active surfaces of car
In surfactant-induced, pseudomorphic transformations of submicrometer-sized nonporous spheres to mesoporous silica spheres, the surface morphologies of the products depend on the solvent used during the initial Stöber synthesis. After hydrothermal transformations employing cetyltrimethylammonium bromide (CTAB) as a surfactant, pseudomorphic products of parent silica spheres synthesized in ethanol (HT-SiO2-EtOH) are mesoporous throughout and have smooth surfaces. In contrast, products from sphere
The electrochemical performance of MOFs for supercapacitor and oxygen reduction reaction applications is significantly improved when conjugated with conductive and 3D connected nanoporous carbon matrices.
Cooking in a small pot: Uniform zeolite particles (see picture) can be prepared in high yield by hydrothermal syntheses within the confinement of inverse-opal carbon reactors. The product morphology depends on interfacial interactions at the reactor walls and on other parameters that can be engineered into the reactor process. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are ma
We investigated the carbon support microporosity effect on active site formation for the oxygen reduction reaction in Fe–N–C catalysts.
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