A5052615820- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Electrocatalysts for Energy Conversion
- X-ray Diffraction in Crystallography
- 2D Materials and Applications
- Crystallization and Solubility Studies
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Fuel Cells and Related Materials
- Advanced Photocatalysis Techniques
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Advanced Battery Technologies Research
- Advanced Condensed Matter Physics
- Analytical Chemistry and Sensors
- Chalcogenide Semiconductor Thin Films
- Crystallography and molecular interactions
- Geophysics and Sensor Technology
- MXene and MAX Phase Materials
- Advanced Sensor and Energy Harvesting Materials
- Phase-change materials and chalcogenides
- Electrochemical Analysis and Applications
- Graphene research and applications
- Calcium Carbonate Crystallization and Inhibition
- Supramolecular Self-Assembly in Materials
Washington University in St. Louis
2022-2024
Ulsan National Institute of Science and Technology
2015-2023
Government of the Republic of Korea
2018-2020
Tokyo Institute of Technology
2018
Zhejiang University
2018
Porous crystalline materials such as covalent organic frameworks and metal-organic have garnered considerable attention promising ion conducting media. However, most of them additionally incorporate lithium salts and/or solvents inside the pores frameworks, thus failing to realize solid-state single lithium-ion conduction behavior. Herein, we demonstrate a sulfonated framework (denoted TpPa-SO3Li) new class solvent-free, conductors. Benefiting from well-designed directional channels, high...
Abstract The high-volume synthesis of two-dimensional (2D) materials in the form platelets is desirable for various applications. While water considered an ideal dispersion medium, due to its abundance and low cost, hydrophobicity platelet surfaces has prohibited widespread use. Here we exfoliate 2D directly pure without using any chemicals or surfactants. In order disperse water, elevate temperature sonication bath, introduce energy via dissipation sonic waves. Storage stability greater...
The hierarchical porous structure has garnered considerable attention as a multiscale engineering strategy to bring unforeseen synergistic effects in vast variety of functional materials. Here, we demonstrate "microporous covalent organic framework (COF) net on mesoporous carbon nanotube (CNT) net" hybrid architecture new class molecularly designed, chemical trap for lithium polysulfides (Li2Sx) Li–S batteries. As proof concept the architecture, self-standing COF-net CNT-net interlayers...
Abstract Chlorine evolution reaction (CER) is a critical anode in chlor-alkali electrolysis. Although precious metal-based mixed metal oxides (MMOs) have been widely used as CER catalysts, they suffer from the concomitant generation of oxygen during CER. Herein, we demonstrate that atomically dispersed Pt−N 4 sites doped on carbon nanotube (Pt 1 /CNT) can catalyse with excellent activity and selectivity. The Pt /CNT catalyst shows superior to nanoparticle-based commercial Ru/Ir-based MMO...
Abstract Developing efficient bifunctional catalysts for overall water splitting that are earth-abundant, cost-effective, and durable is of considerable importance from the practical perspective to mitigate issues associated with precious metal-based catalysts. Herein, we introduce a heterostructure comprising perovskite oxides (La 0.5 Sr CoO 3– δ ) molybdenum diselenide (MoSe 2 as an electrochemical catalyst electrolysis. Interestingly, formation La MoSe induces local phase transition in ,...
Platinum single-atom catalysts hold promise as a new frontier in heterogeneous electrocatalysis. However, the exact chemical nature of active Pt sites is highly elusive, arousing many hypotheses to compensate for significant discrepancies between experiments and theories. Here, we identify stabilization low-coordinated
Electrostatic capacitors are foundational components of advanced electronics and high-power electrical systems owing to their ultrafast charging-discharging capability. Ferroelectric materials offer high maximum polarization, but remnant polarization has hindered effective deployment in energy storage applications. Previous methodologies have encountered problems because the deteriorated crystallinity ferroelectric materials. We introduce an approach control relaxation time using...
Metal sulfide-based nanostructured materials have emerged as promising catalysts for hydrogen evolution reaction (HER), and significant progress has been achieved in enhancing their activity durability the HER. The understanding of nanoscale size-dependent catalytic activities can suggest critical information regarding reactivity, providing scientific basis design advanced catalysts. However, size effects metal HER not yet established fully, due to synthetic difficulty precisely...
The development of active and stable non-precious-metal electrocatalysts for energy conversion reactions involving hydrogen oxygen has been pivotal importance realizing a clean-energy-based society. As class electrocatalysts, cobalt- nitrogen-codoped carbon (Co–N/C) catalysts have shown promising activity the evolution reaction (HER). further advancement Co–N/C is, however, hindered by poor understanding their sites; typical preparation involves high-temperature pyrolysis, yielding with...
Abstract The sluggish reaction kinetics of the alkaline hydrogen evolution (HER) remains an important challenge for water–alkali electrolyzers, which originates predominantly from additional water dissociation step required HER. In this work, it is demonstrated theoretically and experimentally that metastable, face‐centered‐cubic α‐MoC 1− x phase shows superior capability HER activity than stable, hexagonal‐close‐packed Mo 2 C phase. Next, high surface area ordered mesoporous (MMC) designed...
Abstract Chiral supramolecules have great potential for use in chiral recognition, sensing, and catalysis. Particularly, supramolecular biocoordination polymers (SBCPs) provide a versatile platform characterizing biorelated processes such as chirality transcription. Here, we selectively synthesize homochiral heterochiral SBCPs, composed of naphthalene diimide ligands Zn ions, from enantiomeric mixed R -ligands S -ligands, respectively. Notably, find that the self-sorted SBCPs exhibit...
Flexible metal–organic frameworks (MOFs) show the structural transition phenomena, gate opening and breathing, upon input of external stimuli. These phenomena have significant implications in their adsorptive applications. In this work, we demonstrate direct capture these gate-opening breathing triggered by CO2 molecules, a well-designed flexible MOF composed rotational sites molecular gates. Combining X-ray single crystallographic data during opening/closing with situ powder diffraction...
Abstract High‐capacity Li‐rich layered oxide cathodes along with Si‐incorporated graphite anodes have high reversible capacity, outperforming the electrode materials used in existing commercial products. Hence, they are potential candidates for development of high‐energy‐density lithium‐ion batteries (LIBs). However, structural degradation induced by loss interfacial stability is a roadblock to their practical use. Here, use malonic acid‐decorated fullerene (MA‐C 60 ) superoxide dismutase...
Battery separators are supposed to be electrical insulators prevent internal short‐circuit failure between electrodes as well having porous channels allow ion transport. Here, a multifunctional membrane strategy dispel this stereotypical belief about battery separators, new class of Janus‐faced, dual (ion/electron)‐conductive/chemically active (denoted “Janus separators”) based on heterolayered nanofiber mat architecture is demonstrated. The Janus separator, which fabricated through...
A zinc sulfonated covalent organic framework is presented as a new single-ion conducting electrolyte for aqueous rechargeable Zn-ion batteries.
Abstract Redox‐active organic electrode materials have garnered considerable interest as an emerging alternative to currently widespread inorganic‐(or metal)‐based counterparts in lithium‐ion batteries (LIBs). Practical use of these materials, however, has posed a challenge due their electrically insulating nature, limited specific capacity, and poor electrochemical durability. Here, new class multiwalled‐carbon‐nanotube‐(MWCNT)‐cored, meso ‐tetrakis(4‐carboxyphenyl)porphyrinato cobalt...
Materials with large birefringence (Δn, where n is the refractive index) are sought after for polarization control (e.g., in wave plates, polarizing beam splitters, etc.), nonlinear optics, micromanipulation, and as a platform unconventional light-matter coupling, such hyperbolic phonon polaritons. Layered 2D materials can feature some of largest optical anisotropy; however, their use most systems limited because axis out plane layers weakly attached. This work demonstrates that bulk crystal...
It is shown that structural disorder-in the form of anisotropic, picoscale atomic displacements-modulates refractive index tensor and results in giant optical anisotropy observed BaTiS
Molybdenum sulfides have attracted widespread attention as promising nonprecious-metal catalysts for the hydrogen evolution reaction (HER). Since MoS2 edge was proposed a major active site, molecular and polymeric analogues to been widely explored HER catalysts. In particular, amorphous MoSx coordination polymers considered because they are rich in unsaturated Mo–S coordination, which is characteristic of edge. Herein, we report that simple monomeric thiomolybdate (MoS42–) could adopt chain...
Facile/sustainable utilization of sulfur active materials is an ultimate challenge in high-performance lithium–sulfur (Li–S) batteries. Here, as a membrane-driven approach to address this issue, we demonstrate new class polysulfide-breathing (capable reversibly adsorbing and desorbing polysulfides)/dual (electron ion) conductive, heterolayered battery separator membranes (denoted "MEC-AA separators") based on 0D (nanoparticles)/1D (nanofibers) composite mats. The MEC-AA fabricated through...
Transition metal dichalcogenides (TMDs) have attracted considerable attention as active electrocatalysts for the hydrogen evolution reaction (HER). Since TMD catalysts are commonly supported on carbon to endow electrical conductivity, understanding growth behaviour of TMDs surfaces is crucial, and yet remains be explored. In this work, we investigated tungsten sulfide (WSx) inside confined nanopores. Experimental computational studies revealed preferential bonding between basal planes WSx...
As a basic characteristic of the natural environment and living matter, chirality has been used in various scientific technological fields. Chiral discrimination is particular interest owing to its importance catalysis, organic synthesis, biomedicine, pharmaceutics. However, it still very challenging effectively selectively sense separate different enantiomers. Here, enantio-differentiating chemosensor systems have developed through spontaneous chiral functionalization surface graphene...
Reactive oxygen species or superoxide (O2-), which damages ages biological cells, is generated during metabolic pathways using as an electron acceptor in systems. Superoxide dismutase (SOD) protects cells from superoxide-triggered apoptosis by converting to and peroxide. Lithium-oxygen battery (LOB) have the same aging problems caused side reactions. We transplanted function of SOD systems into LOB cells. Malonic acid-decorated fullerene (MA-C60) was used a disproportionation chemocatalyst...
Manganese (Mn) oxides, widely found in aquatic and terrestrial environments, play crucial roles natural ecosystems environmental processes. Previously, it was believed that naturally abundant Mn oxides originated through biotically mediated However, we have revealed the significance of photochemically induced abiotic oxidation Mn2+(aq) to Mn(IV) oxides. This study further elucidates co-oxidation aqueous Mn2+ cobalt (Co2+), which leads predominant formation Mn(IV)-Co(III) oxide nanosheets....