A5029053923- Advanced battery technologies research
- Metal-Organic Frameworks: Synthesis and Applications
- Supercapacitor Materials and Fabrication
- Covalent Organic Framework Applications
- Membrane Separation and Gas Transport
- Carbon dioxide utilization in catalysis
- Electrocatalysts for Energy Conversion
- Membrane Separation Technologies
- Chemical Synthesis and Reactions
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Advanced Sensor and Energy Harvesting Materials
- Carbon Nanotubes in Composites
- Synthesis and Characterization of Heterocyclic Compounds
- Conducting polymers and applications
- Ferroelectric and Piezoelectric Materials
- Fuel Cells and Related Materials
- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
- Dielectric materials and actuators
- Advanced oxidation water treatment
- Transition Metal Oxide Nanomaterials
- Radioactive element chemistry and processing
- Advanced Photocatalysis Techniques
- Corrosion Behavior and Inhibition
Korea Institute of Science and Technology
2017-2024
Korea University of Science and Technology
2017-2021
Seoul Institute
2018
Government of the Republic of Korea
2018
The facile tuning of the gate size and chemical functionalization zeolitic imidazolate framework-8 (ZIF-8) were achieved by postsynthetic modification with 3-amino-1,2,4-triazole. resulting amine functionalized ZIF-8 particles enabled CO<sub>2</sub> selective adsorption further modifications.
The efficient removal of radioactive iodine (I2) has drawn worldwide attention because the severe effects radiotoxicity on environment and human health. As a result, porous materials for capture safe storage are required. In this work, nanoscale zeolitic imidazolate framework-8 (ZIF-8) its amino-functionalized ZIF-8 derivatives with 3-amino-1,2,4-triazole (Atz), denoted as ZIF8-A, were prepared via postsynthetic modification, their performance I2 from n-hexane was investigated. abundant...
Polybenzimidazole (PBI) has been considered as promising membrane material for all-vanadium redox flow batteries (VRFBs) due to its compact morphology that can hinder vanadium crossover. However, 2–4 mS cm−1 proton conductivity remains a challenge achieve high energy efficiency. Recently developed PBI membranes showed up 18 by pre-treatment with phosphoric acid (PA) and 56 KOH. since the operation of VRFB uses sulfuric (SA), different chemicals generates chemical wastes. Here we investigate...
Abstract Polybenzimidazole has been widely examined as a separator for vanadium redox flow batteries (VRFBs) due to its low permeability. Its conductivity can be tackled by combining 1–4 µm thin dense PBI layers with highly conductive mechanically supporting layers, either lamination or loose stacking. While gel‐PBI is very soft and conductive, the shadow effect of non‐conductive pore walls porous supports adds resistance. In this work, these issues are addressed coating 25 thick sulfonated...
Abstract Ion conducting membranes play a crucial role in redox flow batteries, separating anolyte and catholyte while allowing proton transport to complete the circuit. However, most are trapped trade‐off relation show either low conductivity or high vanadium crossover. This study investigates use of dense sulfonated para ‐polybenzimidazole for batteries (VRFBs), analyzes effects membrane preparation process, thickness operating temperature on VRFB performance. The results demonstrate...
Abstract Polybenzimidazole (PBI) membranes show excellent chemical stability and low vanadium crossover in redox flow batteries (VRFBs), but their high resistance is challenging. This work introduces a concept, membrane assemblies of highly selective 2 µm thin PBI between two 60 thick conductive gel membranes, which act as soft protective layers against external mechanical forces astray carbon fibers from the electrode. The are produced by casting phosphoric acid solutions commercial powder...
This work demonstrates the development of a hierarchical mesoporous hybrid ZIF-8 with 1,2,4-triazole (T), ZIF-8T, as heterogeneous catalyst for CO2 cycloaddition to epoxides under solvent- and cocatalyst-free conditions at ambient pressure. The ZIF-8T was prepared via facile one-pot synthesis method using mixed-ligand 2-methyl imidazole (2-Mim) T. contents introduced T ligand in were controlled by adjusting molar ratio T: 2-Mim ligand. Interestingly, 84.9% showed hollow mesopore properties...
2 μm thick meta-polybenzimidazole (PBI) films effectively block permeation of vanadium ions in redox flow batteries, but are usually reinforced with supports to guarantee mechanical stability. Here, we eliminate the use an additional support by laminating a 10-wt% dibromoxylene crosslinked PBI layer directly on carbon paper. The total area specific resistance (ASR) two is 156.8 mΩ cm2 1.5 M V4+/3 sulfuric acid solution, 26 % lower than that Nafion 211. VRFB cells made assembling membrane...
Amine-functionalized bimetallic zeolitic imidazolate framework-8 (Co/Zn-ZIF-A) with 3-amino-1,2,4-triazole (Atz) was synthesized via a post-synthetic modification and utilized as heterogeneous catalyst for the synthesis of cyclic carbonates from CO 2 epoxides. Co/Zn-ZIF-A highest contents Atz (Co/Zn-ZIF-A-24h) exhibited superior catalytic activity compared to that pristine Co/Zn-ZIF CO cycloaddition reaction; Co/Zn-ZIF-A-24h achieved an excellent result 99% conversion epichlorohydrin high...