- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Semiconductor materials and devices
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- Electrocatalysts for Energy Conversion
- Ferroelectric and Negative Capacitance Devices
- Membrane-based Ion Separation Techniques
- Food Quality and Safety Studies
- Covalent Organic Framework Applications
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Cellulose Research Studies
- Copper Interconnects and Reliability
- Advanced Memory and Neural Computing
- Extraction and Separation Processes
- Acoustic Wave Resonator Technologies
- Electronic and Structural Properties of Oxides
- Electrospun Nanofibers in Biomedical Applications
- Semiconductor materials and interfaces
- Agriculture, Soil, Plant Science
- Polymer crystallization and properties
Yonsei University
2005-2025
Samsung (South Korea)
2008-2023
Ulsan National Institute of Science and Technology
2013-2022
Namseoul University
2005-2022
Seoul National University
2007-2021
Korea University
2021
Kookmin University
2021
Ulsan College
2015-2020
Government of the Republic of Korea
2016-2020
Korea Environment Institute
2020
All-inkjet-printed, solid-state flexible supercapacitors (SCs) on paper are demonstrated as a new class of power sources with exceptionally versatile aesthetics. The inkjet-printed SCs look like letters or figures commonly found in office documents and aesthetically unitized other printed images paper.
The mechanical flexibility of a cable-type battery reaches levels far beyond what is possible with conventional designs. hollow-spiral (helical) multi-helix anode architecture critical to the robustness under stress and facilitates electrolyte wetting components. This design enables reliably power an LED screen or MP3 player even severe twisting bending. Detailed facts importance specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited...
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...
Al-doped TiO2 thin films to be used in future DRAM capacitors with excellent leakage properties as well high dielectric constants are fabricated. The next generation stack structured cell composed of a transistor and capacitor is shown (see Figure). A large capacitance required for successful operation DRAMs irrespective the feature size cell. Therefore, scaling down proceeds, higher-k material such has eventually implemented capacitor. Supporting information this article available on WWW...
Eco-friendly cellulose nanofibers (CNFs), a core constituent of cellulose, have garnered increasing attention as promising sustainable building block source for advanced materials in various application fields. In the present study, we successfully fabricate nanofiber paper from CNF suspension and explore its potential to separator membrane lithium-ion batteries. contrast macro/microscopic fibers that been commonly used typical papers, CNFs are characterized by nanometer-scale...
Bulk-type all-solid-state lithium batteries (ASLBs) are considered a promising candidate to outperform the conventional lithium-ion batteries. Unfortunately, current technology level of ASLBs is in stage infancy terms cell-based (not electrode-material-based) energy densities and scalable fabrication. Here, we report on first ever bendable thin sulfide solid electrolyte films reinforced with mechanically compliant poly(paraphenylene terephthalamide) nonwoven (NW) scaffold, which enables...
The unending demand for portable, flexible, and even wearable electronic devices that have an aesthetic appeal unique functionality stimulates the development of advanced power sources excellent electrochemical performance and, more importantly, shape versatility. challenges in fabrication next-generation flexible mainly arise from their limited form factors, which prevent facile integration into differently shaped devices, lack reliable materials exhibit optimized attributes suitable...
A facile approach to fabricate a highly bendable plastic crystal composite electrolyte (PCCE) for use in shape conformable all-solid-state lithium-ion batteries is demonstrated. This strategy based on integration of semi-interpenetrating polymer network (semi-IPN) matrix with (PCE, 1 M lithium bis-trifluoromethanesulfonimide succinonitrile). In comparison conventional carbonate-based electrolytes, salient benefits the PCE are thermal stability and nonflammability, which show promising...
A new class of highly thin, deformable, and safety‐reinforced plastic crystal polymer electrolytes (N‐PCPEs) is demonstrated as an innovative solid electrolyte for potential use in high‐performance flexible lithium‐ion batteries with aesthetic versatility robust safety. The unusual N‐PCPEs are fabricated by combining a porous polyethylene terephthalate (PET) nonwoven. Herein, the three‐dimensional reticulated matrix formed directly inside PET nonwoven skeleton via in‐situ UV‐crosslinking...
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...
Forthcoming flexible/wearable electronic devices with shape diversity and mobile usability garner a great deal of attention as an innovative technology to bring unprecedented changes in our daily lives. From the power source point view, conventional rechargeable batteries (one representative example is lithium-ion battery) fixed shapes sizes have intrinsic limitations fulfilling design/performance requirements for electronics. Here, facile efficient strategy address this formidable...
Background: We aimed to find a new radiographic measurement for evaluating first metatarsal pronation and sesamoid position in hallux valgus (HV) deformity. Methods: Data from clinical study of 19 control patients (19 feet) with no HV deformity were compared preoperative data 138 (166 deformities. Using weightbearing plain radiograph anteroposterior (AP) view, the intermetatarsal angles (IMAs) (HVAs) groups measured. semi-weightbearing coronal computed tomography (CT) axial α angle was...
A novel design concept of a three-dimensional graphene shell encapsulated cobalt nanostructure as new route to tune the work function for enhanced ORR.
Sheet-type solid electrolyte (SE) membranes are essential for practical all-solid-state Li batteries (ASLBs). To date, SE membrane development has mostly been based on polymer electrolytes with or without the aid of liquid electrolytes, which offset thermal stability (or safety). In this study, a new scalable fabrication protocol thin (40–70 μm) and flexible single-ion conducting sulfide high conductance (29 mS) excellent (up to ∼400 °C) is reported. Electrospun polyimide (PI) nonwovens...
Nanomat Li–S batteries based on all-fibrous cathode/separator assemblies and reinforced Li metal anodes are presented to enable ultrahigh-energy-density flexibility.
The current lithium-ion battery (LIB) electrode fabrication process relies heavily on the wet coating process, which uses environmentally harmful and toxic N-methyl-2-pyrrolidone (NMP) solvent. In addition to being unsustainable, use of this expensive organic solvent substantially increases cost production, as it needs be dried recycled throughout manufacturing process. Herein, we report an industrially viable sustainable dry press-coating that combination multiwalled carbon nanotubes...
Abstract Conventional self‐charging systems are generally complicated and highly reliant on the availability of energy sources. Herein, a chemically self‐charging, flexible solid‐state zinc ion battery (ssZIB) based vanadium dioxide (VO 2 ) cathode polyacrylamide‐chitin nanofiber (PAM‐ChNF) hydrogel electrolyte is developed. With power density 139.0 W kg ‐1 , ssZIBs can deliver high 231.9 Wh . The superior electrochemical performance attributed to robust tunnel structure VO entangled network...
Abstract Rechargeable calcium batteries have attracted increasing attention as promising multivalent ion battery systems due to the high abundance of calcium. However, development has been hampered by lack suitable cathodes accommodate large and divalent Ca 2+ ions at a redox potential with sufficiently fast ionic conduction. Herein, we report new intercalation host which presents 500 cycles capacity retention 90% remarkable power capability ~3.2 V (vs. Ca/Ca ) in battery. The cathode...
Herein, we report a charge-transfer complex electrolyte additive, 7,7,8,8-tetracyanoquinodimethane (TCNQ), with high Zn affinity, which was tightly adsorbed on the surface of anode to form dense and robust interfacial layer suppress activity H2O. As verified by comprehensive experimental computational analyses, this could construct Zn–Zn(TCNQ)2 Ohmic contact interface, guide rapid ion/electron transport, ameliorate electric field distribution, inhibit direct between active H2O anode,...