A5083133451- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Advanced oxidation water treatment
- Advanced Photocatalysis Techniques
- Fuel Cells and Related Materials
- Extraction and Separation Processes
- Pharmaceutical and Antibiotic Environmental Impacts
- Graphene research and applications
- Catalytic Processes in Materials Science
- Industrial Gas Emission Control
- Electrochemical Analysis and Applications
- Microbial bioremediation and biosurfactants
- Atmospheric chemistry and aerosols
- Semiconductor materials and interfaces
- Water Treatment and Disinfection
- Perovskite Materials and Applications
- Copper-based nanomaterials and applications
- Conducting polymers and applications
- Semiconductor materials and devices
- Odor and Emission Control Technologies
- Environmental remediation with nanomaterials
Korea University
2019-2025
Institute for Basic Science
2012-2025
Seoul National University
2011-2025
South China University of Technology
2025
Korea University of Science and Technology
2021-2024
Korea Atomic Energy Research Institute
2013-2023
Korea Institute of Science and Technology
2021-2022
Kyung Hee University
2022
Seoul Institute
2017-2021
Government of the Republic of Korea
2015-2021
Hollowing Out Metal Oxide Nanoparticles Corrosion is normally a problem, but it can be useful, for example, when you wish to create hollow metal nanoparticles, whereby the reduction of one species in solution drives dissolution core particle. Oh et al. (p. 964 ; see Perspective by Ibáñez and Cabot ) adapted this approach oxide nanoparticles placing Mn 3 O 4 nanocrystals with Fe 2+ ions, which replaces nanocrystal exterior γ-Fe 2 . At sufficiently high concentrations, nanocages formed. These...
Developing high‐energy‐density electrodes for lithium ion batteries (LIBs) is of primary importance to meet the challenges in electronics and automobile industries near future. Conversion reaction‐based transition metal oxides are attractive candidates LIB anodes because their high theoretical capacities. This review summarizes recent advances on development nanostructured use battery based conversion reactions. The oxide materials covered this include iron, manganese, cobalt, copper,...
Although different kinds of metal oxide nanoparticles continue to be proposed as anode materials for lithium ion batteries (LIBs), their cycle life and power density are still not suitable commercial applications. Metal have a large storage capacity, but they suffer from the excessive generation solid–electrolyte interphase (SEI) on surface, low electrical conductivity, mechanical degradation pulverization resulted severe volume expansion during cycling. Herein we present preparation...
The need/desire to lower the consumption of fossil fuels and its environmental consequences has reached unprecedented levels in recent years. A global effort been undertaken develop advanced renewable energy generation especially storage technologies, as they would enable a dramatic increase effective efficient use (and often intermittent) sources. development electrical (EES) technologies with high power densities, long life, low cost, safe represents challenge from both fundamental science...
Edge-exposed MoS2 nano-assembled structures are designed for high hydrogen evolution reaction activity and long term stability. The number of sulfur edge sites spheres sheets is confirmed by Raman spectroscopy EXAFS analysis. By controlling the morphology with formation assembly small-size fragments MoS2, resulting assembled have electrocatalytic HER thermodynamic
Identifying the catalytically active site(s) in oxygen reduction reaction (ORR), under real-time electrochemical conditions, is critical to development of fuel cells and other technologies. We have employed situ synchrotron-based X-ray absorption spectroscopy (XAS) investigate synergistic interaction a Co–Mn oxide catalyst which exhibits impressive ORR activity alkaline cells. near edge structure (XANES) was used track dynamic structural changes Co Mn both steady state (constant applied...
A synthetic method to construct a highly stable, densely packed Zn anode is presented by provoking the unusual Cu–Zn alloying alongside plating. The compact retains its morphology over repeated plating/stripping cycles in aqueous media.
Abstract The complex interplay and only partial understanding of the multi-step phase transitions reaction kinetics redox processes in lithium–sulfur batteries are main stumbling blocks that hinder advancement broad deployment this electrochemical energy storage system. To better understand these aspects, here we report operando confocal Raman microscopy measurements to investigate Li–S provide mechanistic insights into polysulfide generation/evolution sulfur deposition. Operando...
Abstract Single‐atom M‒N‒C catalysts have attracted tremendous attention for their application to electrocatalysis. Nitrogen‐coordinated mononuclear metal moieties (MN x moities) are bio‐inspired active sites that analogous various metal‐porphyrin cofactors. Given the functions of cofactors highly dependent on local coordination environments around site, engineering MN in heterogeneous would provide an additional degree freedom boosting electrocatalytic activity. This work presents a...
Silicon monoxide (SiO), which exhibits better cyclability compared to silicon while delivering higher capacity than that of graphite, is an adequate material for the development lithium-ion batteries (LIBs) having energy densities. However, incorporating silicon-based materials including SiO into stable graphite anode inevitably degrades not only cycle life but also calendar LIBs, little known about their aging mechanisms. Here, SiO-induced thermal instability graphite/SiO composite...
Hydrogen-derived power is one of the most promising components a fossil fuel-independent future when deployed with green and renewable primary energy sources. Energy from sun, wind, waves/tidal, other emissions-free sources can water electrolyzers (WEs), devices that produce hydrogen without carbon emissions. According to recent International Renewable Agency reports, WEs employed in industry are currently alkaline proton-exchange membrane (PEMWEs), ∼200 ∼70 years commercialization history,...
The demand for lithium has greatly increased with the rapid development of rechargeable batteries. Currently, main resource is brine lakes, but conventional recovery process time consuming, inefficient, and environmentally harmful. Rechargeable batteries have been recently used recovery, consist iron phosphate as a cathode. These feature promising selectivity between sodium, they suffer from severe interference coexisting magnesium ions, an essential component brine, which prompted further...
We introduce a simple process to synthesize few-layered MoS2 nanosheets supported on coaxial carbon nanotubes through an L-cysteine-assisted hydrothermal route, in which L-cysteine, cheap and ordinary amino acid, plays fundamental role controlling the morphology of hybrid material binder help growth surface nanotubes. It is also demonstrated that polypeptide formed by L-cysteine can be transformed into amorphous heat treatment under inert atmosphere. The materials exhibit high capacity...
Sodium-ion batteries (SIBs) have attracted enormous attention in recent years due to the high abundance and low cost of sodium. However, contrast lithium-ion batteries, conventional graphite is unsuitable for SIB anodes because it much more difficult intercolate larger Na ions into layers. Therefore, critical develop new anode materials SIBs practical use. Here, heteroatom-doped graphene with doping levels disordered structures prepared using a simple economical thermal process. The...
Abstract Solvothermal processes are considered efficient approaches for the gram-scale production of graphene. Further modification graphene by chemical doping is an important approach to tailor its properties. In this work, we successfully synthesized sulfur-doped using a solvothermal method with dimethyl sulfoxide as precursor, which common laboratory reagent. Nitrogen-doped was produced demonstrate generality process. These heteroatom-doped materials exhibited high surface areas and...
A composite of modified graphene and LiFePO4 has been developed to improve the speed charging–discharging cycling stability lithium ion batteries using as a cathode material. Chemically activated (CA-graphene) successfully synthesized via activation by KOH. The as-prepared CA-graphene was mixed with prepare composite. Microscopic observation nitrogen sorption analysis have revealed surface morphologies CA-graphene/LiFePO4 Electrochemical properties also investigated after assembling coin...
Li-rich layered cathode materials are very promising candidates for next generation high energy lithium ion batteries. One of the materials, Li1.167Ni0.233Co0.100Mn0.467Mo0.033O2 is prepared by a co-precipitation method. In this report, we focus on anomalous changes upon cycling in material voltage range 2.0–4.55 V at room temperature. The structural transitions analyzed ex situ X-ray diffraction. addition, local structure during studied absorption near edge structure. With differential...
Lithium–sulfur (Li–S) batteries are expected to overcome the limit of current energy storage devices by delivering high specific with low material cost. However, potential Li–S has not yet been realized because several technical barriers. Poor electrochemical performance is mainly attributed electrical conductivity fully charged and discharged species, irreversible loss polysulfide anions decrease in number electrochemically active reaction sites during battery operation. Here, we report...
For Li–S batteries, <italic>operando</italic> X-ray diffraction and microscopy are combined to visualize the evolution of both morphology crystal structure materials during cycling.
We report a simple synthetic method of carbon-based hybrid cellular nanosheets that exhibit outstanding electrochemical performance for many key aspects lithium-ion battery electrodes. The consist close-packed cubic cavity cells partitioned by carbon walls, resembling plant leaf tissue. loaded with SnO2 nanoparticles vapor deposition and tested the resulting SnO2–carbon as anode materials. specific capacity is 914 mAh g–1 on average retention 97.0% during 300 cycles, reversible decreased...
In this manuscript, we introduce a facile hydrothermal method for the controlled growth of SnO2 nanoparticles onto graphene oxide. Hydrazine plays fundamental role in controlling formation and crystallization nanoparticles, reduction oxide to graphene. The SnO2–graphene composite consists 3–4 nm monodisperse nanocrystals homogeneously dispersed at surface It is demonstrated that can accommodate large volume change which occurs during lithiation–delithiation cycles. When used as an anode...