A5101893699- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Conducting polymers and applications
- Advanced Battery Materials and Technologies
- Perovskite Materials and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Wastewater Treatment and Nitrogen Removal
- Advanced Memory and Neural Computing
- Calcium Carbonate Crystallization and Inhibition
- Catalysis and Oxidation Reactions
- Advanced Cellulose Research Studies
- Membrane Separation and Gas Transport
- Concrete and Cement Materials Research
- Analytical Chemistry and Sensors
- Materials Engineering and Processing
- Municipal Solid Waste Management
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Extraction and Separation Processes
- Marine and Coastal Research
- Phosphorus and nutrient management
- Membrane-based Ion Separation Techniques
- Fuel Cells and Related Materials
Korea Institute of Science and Technology
2002-2024
Max Planck Institute of Colloids and Interfaces
2020-2022
University of Potsdam
2021
Government of the Republic of Korea
2016-2018
Seoul Institute
2018
Seoul National University
2013-2016
Organolead halide perovskites are used for low-operating-voltage multilevel resistive switching. Ag/CH3 NH3 PbI3 /Pt cells exhibit electroforming-free switching at an electric field of 3.25 × 10(3) V cm(-1) four distinguishable ON-state resistance levels. The migration iodine interstitials and vacancies with low activation energies is responsible the low-electric-field via filament formation annihilation.
Carbon-based catalysts have been attracting attention in renewable energy technologies due to the low cost and high stability, but their insufficient activity is still a challenging issue. Here, we suggest that monolayer graphene can be used as catalyst for solar-driven hydrogen evolution reaction on Si-photocathodes, its catalytic boosted by plasma treatment N2-ambient. The induces abundant defects incorporation of nitrogen atoms structure, which act sites graphene. containing impurities...
The impact on the performance of all-vanadium redox flow batteries by tin as an electrocatalyst through <italic>in situ</italic> electrodeposition is investigated.
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...
An ozone treatment system was introduced as an alternative method for municipal sludge and disposal. A pilot-scale facility built to investigate the feasibility of ozonation reduction recycle. The consists three main parts; advanced wastewater treatment, belt press dewatering. Ozonation resulted in mass by mineralization well volume improvement dewatering characteristics. supernatant ozonated sludge, consisting solubilized organics micro-particles, proved be effective carbon source...
The catalytic properties of noble metal nanocrystals are a function their size, structure, and surface composition. In particular, achieving high activity without sacrificing stability is essential for designing commercially viable catalysts. A major challenge in state-of-the-art Ru-based catalysts the oxygen evolution reaction (OER), which key step water splitting, poor tailorability these this study, we designed rapidly synthesizable size-controlled, morphology-selective, surface-tailored...
A taurine biomolecule performs as an efficient organic additive for the positive electrolyte of a vanadium redox flow battery (VRFB).
The electrochemical nitrogen reduction reaction (NRR) to ammonia (NH3 ) is a potentially carbon-neutral and decentralized supplement the established Haber-Bosch process. Catalytic activation of highly stable dinitrogen molecules remains great challenge. Especially metal-free nitrogen-doped carbon catalysts do not often reach desired selectivity production rates due their low concentration NRR active sites possible instability heteroatoms under potential, which can even contribute false...
The feasibility of ozone treatment municipal sludge for reduction and carbon source production has been investigated. Significant accumulation solubilized organics unsettlable micro-solids (UMS) was observed at relatively low dosages while mineralization became dominant higher dosages. Batch denitrification experiments showed that the UMS could be utilized as sources nitrogen removal. In terms overall reduction, 54% total mass achieved by 0.2 g-O3/g-MLSS.
Abstract The use of organic materials with reversible redox activity holds enormous potential for next‐generation Li‐ion energy storage devices. Yet, most candidates are not truly sustainable, i.e., derived from renewable feedstock or made in benign reactions. Here an attempt is reported to resolve this issue by synthesizing cathode material tannic acid and microporous carbon biomass. All constituents, including the redox‐active conductive additive, resources. Using a simple, sustainable...
Sustainable energy storage materials are needed to implement necessary transitions a more sustainable society. Therefore, we present novel vanillin (and thus ultimately possibly lignin)-derived electrode for lithium-ion-based systems. In the approach, is first modified in two steps afford bisvanillonitrile (BVN). The precursor electrodes made from BVN and carbon black subsequently treated atmosphere of triflic acid order polymerize BVN. Used as cathode material device, resulting shows...
Histidine, inspired by vanadium bromoperoxidase enzyme, has been applied as a homogeneous electrocatalyst to the positive electrolyte of redox flow battery (VRFB) improve performance and stability VRFB at elevated temperatures. The histidine-containing is found significantly in terms thermal estimated remaining amount VO2+ (61 vs 43% pristine one), energy efficiency high current density 150 mA cm–2 (78.7 71.2%), capacity retention (73.2 27.7%) 60 °C. mechanism catalytic functions histidine...
RFBs, which use soluble redox species dissolved in electrolytes, show great promise for large-scale energy storage systems (ESSs) because of their scalability, cost-effectiveness, and design flexibility that can decouple power diverse purposes; however, low density has limited widespread application. Most conventional ways to increase the date have relied on either exploiting high-concentration electrolytes contain large amounts materials per volume or developing with higher solubility....
On page 6562, K. T. Nam, H. W. Jang, and co-workers describe an ultralow electric field high-ON/OFF-ratio resistive-switching behavior of solution-processed organo-metal halide perovskite (OHP) films with the rotational motion A-site molecular cation. Metal/OHP/metal cells exhibit electroforming-free resistive switching at 3.25 × 103 V cm−1 for four distinguishable ON-state resistance levels.
The nanoscale combination of a conductive carbon and carbon‐based material with abundant heteroatoms for battery electrodes is method to overcome the limitation that latter has high affinity alkali metal ions but low electronic conductivity. synthetic protocol individual ratios structures are important aspects influencing properties such multifunctional compounds. Their interplay is, herein, investigated by infiltration porous ZnO‐templated (ZTC) nitrogen‐rich obtained condensation...