A5101443817- Supercapacitor Materials and Fabrication
- Graphene research and applications
- Transition Metal Oxide Nanomaterials
- Advancements in Battery Materials
- Bone Tissue Engineering Materials
- Gas Sensing Nanomaterials and Sensors
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- 2D Materials and Applications
- Silk-based biomaterials and applications
- Polymer Surface Interaction Studies
- Advanced Battery Materials and Technologies
- Conducting polymers and applications
- Hydrogen Storage and Materials
- MXene and MAX Phase Materials
- Electrocatalysts for Energy Conversion
- Advanced Sensor and Energy Harvesting Materials
- Advanced battery technologies research
- Additive Manufacturing and 3D Printing Technologies
- Advanced Memory and Neural Computing
- Dental materials and restorations
- Microstructure and Mechanical Properties of Steels
- Surface Modification and Superhydrophobicity
- Toxic Organic Pollutants Impact
- Carbon Nanotubes in Composites
Incheon National University
2014-2024
Korea Atomic Energy Research Institute
2018-2024
Changwon National University
2022
Government of the Republic of Korea
2016-2021
Incheon Medical Center
2014-2020
Convergence
2020
Chosun University
2009-2019
Kyung Hee University
2015
Ulsan National Institute of Science and Technology
2011-2013
Korea Basic Science Institute
2010-2012
Novel carbon-based microporous nanoplates containing numerous heteroatoms (H-CMNs) are fabricated from regenerated silk fibroin by the carbonization and activation of KOH. The H-CMNs exhibit superior electrochemical performance, displaying a specific capacitance 264 F/g in aqueous electrolytes, energy 133 Wh/kg, power 217 kW/kg, stable cycle life over 10000 cycles. As service to our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed...
Abstract Silk proteins are of great interest to the scientific community owing their unique mechanical properties and interesting biological functionality. In addition, silk not burned out following heating, rather they transformed into a carbonaceous solid, pyroprotein; several studies have identified potential carbon precursors for state-of-the-art technologies. However, no mechanism carbonization has yet been reported. Here we examine structural chemical changes systematically at...
Graphene-decorated V2O5 nanobelts (GVNBs) were synthesized via a low-temperature hydrothermal method in single step. (VNBs) formed the presence of graphene oxide, mild oxidant, which also enhanced conductivity GVNBs. From electron energy loss spectroscopy analysis, reduced oxide (rGO) are inserted into layered crystal structure nanobelts, further confirmed nanobelts. The electrochemical energy-storage capacity GVNBs was investigated for supercapacitor applications. specific capacitance...
Pyroprotein-based carbon nanoplates are fabricated from self-assembled silk proteins as a versatile platform to examine sodium-ion storage characteristics in various environments. It is found that, depending on the local structure, sodium ions stored via chemi-/physisorption, insertion, or nanoclustering of metallic sodium. As service our authors and readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized for online...
Abstract A conventional electrode composite for rechargeable zinc‐ion batteries (ZIBs) includes a binder strong adhesion between the material and current collector. However, introduction of leads to electrochemical inactivity low electrical conductivity, resulting in decay capacity rate capability. We present binder‐ conducting agent‐free VO 2 using situ polymerization dopamine on flexible collector pyroprotein‐based fibers. The as‐fabricated was used as substrate direct growth...
In the present study, we have synthesized high surface area MoS2 sponge electrodes via a facile hydrothermal method followed by freeze drying process. The performance of based symmetric capacitor showed specific capacitance value around 128 F g-1 at scan rate 2 mV s-1, and also single electrode 510 g-1, which is remarkable to be reported for material in device configuration. Also, energy density 6.15 Wh kg-1 good cyclic stability over 4000 cycles are obtained symmetrical cell.
The island-like distribution of the oxygen functional groups graphene oxide was identified by deposition TiO<sub>2</sub> on surface using low-temperature atomic layer deposition.
Ultra-sensitive RGO gas sensors with a facile preparation method are presented. The sensor composed of nanofibers showed excellent sensitivity to NO<sub>2</sub>gas.
We have obtained high pressure H(2) isotherms with respect to the interlayer distance of multilayered graphene oxide (GO) modulated by thermal annealing. The maximum storage capacity is 4.8 (0.5) wt% at 77 K (298 K) and 9.0 MPa pressure. found optimum GO for uptake 6.5 Å, similar predicted distances from first-principles calculations graphite materials. Our results reveal that can be a practical material choice allow use as hydrogen material, provided only small amounts O OH functional...
Studies of the interaction between hydrogen and graphene have been increasingly required due to indispensable modulation electronic structure for device applications possibility using as a storage material. Here, we report on behaviour molecular gate voltage-dependent resistance single-, bi- multi-layer sheets function H2 gas pressure up 24 bar from 300 K 345 K. Upon exposure, charge neutrality point shifts toward negative voltage region, indicating n-type doping distinct Raman signature...
Silks are protein-based natural structured materials with an unusual combination of high strength and elongation. Their unique microstructural features composed hard β-sheet crystals aligned within a soft amorphous region lead to the robust properties silks. Herein we report large enhancement in intrinsic silk through transformation basic building blocks into poly-hexagonal carbon structure by simple heat treatment axial stretching. The clusters originating from retain preferred orientation...
Thermally reducible pyroprotein-based electronic textiles (e-textiles) are fabricated using graphene oxide and a pyroprotein such as cocoon silk spider web without any chemical agents. The electrical conductivity of the e-textile is 11.63 S cm-1 , which maintained even in bending, washing, temperature variation.
The use of reduced graphene oxide (rGO) suffers from irreparable damage because topological defects and residual heteroatoms, which degrade the inherent properties graphene. To restore its electrical transport properties, charge-transfer chemical doping with d-electron-rich heteroatoms has been proposed. Herein, we report effects atomic-level selenium in rGO. Using first-principles calculations, found that atoms could be selectively bonded particular locations, such as pseudo-edge sites...
Effective sequestration of harmful organic pollutants from wastewater has been a persistent concern in the interest environmental and ecological protection pollution hazards. Currently, common water treatment technologies such as adsorption, coagulation, membranes are expensive not greatly effective. A new class inorganic composite metal–organic frameworks (MOFs) emerged an essential materials for numerous applications, including photocatalytic degradation pollutants. Herein, we present...
Investigations into the interaction between molecular hydrogen and molybdenum disulphide have been in increasing demand to improve understanding of hydrodesulphurisation process, especially creation sulphur vacancies which result coordinatively unsaturated sites MoS2. Here we present comprehensive studies structural electronic modulation caused by exposure MoS2 H2 over a low temperature range, may be helpful for industrial applications. Detail investigations were conducted with Raman...