A5051483410- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Conducting polymers and applications
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Extraction and Separation Processes
- Electrochemical sensors and biosensors
- Advanced Sensor and Energy Harvesting Materials
- Advanced Photocatalysis Techniques
- Semiconductor materials and interfaces
- Graphene research and applications
- Neuroscience and Neural Engineering
- Semiconductor materials and devices
- Analytical Chemistry and Sensors
- Fiber-reinforced polymer composites
- Corrosion Behavior and Inhibition
- Organic Electronics and Photovoltaics
- Gas Sensing Nanomaterials and Sensors
- Ammonia Synthesis and Nitrogen Reduction
- Anodic Oxide Films and Nanostructures
- CO2 Reduction Techniques and Catalysts
Ulsan National Institute of Science and Technology
2016-2025
Government of the Republic of Korea
2015-2018
Ulsan College
2014-2015
LG Chem (South Korea)
2008-2012
Korea Polytechnic University
2012
SK Group (South Korea)
2012
Brown University
2001-2010
Seoul National University
2005
Pohang University of Science and Technology
1997-2004
Abstract Application targets of lithium ion batteries (LIBs) are moving from small‐sized mobile devices information technology to large‐scale electric vehicles (xEVs) and energy storage systems (ESSs). Environmental issues abruptly increasing power demands pushing high performance or onto markets. LIBs one the most potential candidates as mainly due their densities with fairly good rate capabilities a long cycle life. As battery become larger in terms stored well physical size, safety...
NiO nanostructures with three distinct morphologies were fabricated by a sol–gel method and their morphology-dependent supercapacitor properties exploited. The nanoflower- shaped distinctive three-dimensional (3D) network the highest pore volume shows best properties. nanopores in flower-shaped nanostructures, offering advantages contact transport of electrolyte, allow for 3D nanochannels structure, providing longer electron pathways. XPS EIS data nanostructure confirm that NiO, which has...
Lithium iron phosphate olivine (LFP) and lithium manganese oxide spinel (LMO) are competitive complementary to each other as cathode materials for ion batteries, especially use in hybrid electric vehicles vehicles. Interest these materials, due their low cost high safety, has pushed research development forward toward performance terms of rate capability capacity retention or cyclability at a temperature around 60 °C. From the view point basic properties, LFP shows higher gravimetric while...
Electric results: The rate capability can be improved in lithium ion batteries (LIBs) by reducing the dimensions of active material; however, LIBs would then have insufficient electrode density. To overcome this problem, carbon-coated single-crystal LiMn2O4 nanoparticle clusters were synthesized as a cathode material for LIBs; densely packed on current collector. Detailed facts importance to specialist readers are published ”Supporting Information”. Such documents peer-reviewed, but not...
Abstract Diversified and extended applications of lithium‐ion batteries demand the development more enhanced materials that can be achieved by sophisticated synthetic methods. Combination novel with strategic design their shape on nanometer scale enables a breakthrough to overcome problems experienced present technologies. In this feature article, an overview is given Mn‐based polyanion‐based cathode nanoscale features for as replace conventional bulk materials. Various methods coupled...
This work presents that Cu with atomic-scale spacings ( d s ) efficiently catalyses the electrochemical co-reduction of CO 2 and NO 3 − to urea. Specifically, near 6 Å (6 Å-Cu) produces urea a high yield rate partial current density.
An energy-storage device consisting of polypyrrole (pPy) doped with indigo carmine (IC) and 2,2'-azinobis (3-ethylbenzothiazoline-6-sulfonate) (ABTS) has been fabricated. These redox-active conducting polymers (see figure) form the basis a battery that depends on faradaic reactions dopants, performs better than conventional batteries ultracapacitors at high power density. Supporting information for this article is available WWW under http://www.wiley-vch.de/contents/jc_2089/2006/c0375_s.pdf...
Specific design and optimization of the configuration micro-scale materials can effectively enhance battery performance, including volumetric density. Herein, we employed commercially available low-cost bulk silicon powder to produce multi-dimensional composed porous nanowires micro-sized cores, which be used as anode in lithium-ion batteries, by combining a metal deposition metal-assisted chemical etching process. Nanoporous 5–8 μm length with pore size ∼10 nm are formed particle. The...
A facile approach to the surface modification of spinel LiNi0.5Mn1.5O4 (LNMO) cathode active materials for high-voltage lithium ion batteries is demonstrated. This strategy based on nanoarchitectured polyimide (PI) gel polymer electrolyte (GPE) coating. The PI coating layer successfully wrapped a large area LNMO via thermal imidization 4-component (pyromellitic dianhydride/biphenyl dianhydride/phenylenediamine/oxydianiline) polyamic acid. In comparison conventional metal oxide-based...
A hybrid electrode consisting of an electric double-layer capacitor graphene nanosheets and a pseudocapacitor the conducting polymer polyaniline exhibits synergistic effect with excellent electrochemical performance for flexible thin film supercapacitors. This supercapacitor is constructed by nanoscale blending method layer-by-layer (LbL) assembly based on electrostatic interactions between positively charged (PANi) negatively oxide (GO) nanosheets. The provides not only improved electronic...
We demonstrate the newly developed Si-based multicomponent anodes exhibiting a highly stable cycling retention (∼65% after 1000 cycles at 1 C discharge–charge rate).
Succinonitrile (SN, CN–[CH2]2–CN) is evaluated as an additive for improving thermal stability in ethylene carbonate (EC)-based electrolytes lithium ion batteries. Without any sacrifice of performance such cyclability and capacity, the introduction SN into electrolyte with a graphite anode LixCoO2 cathode leads to (1) reducing amount gas emitted at high temperature, (2) increasing onset temperature exothermic reactions (3) decreasing exothermal heat. The improvement considered be due strong...
Lithium ion movement was accelerated by enlarging the interlayer distance of graphite as well polarizing its surface charge. As a result, rate performances lithium batteries were significantly enhanced.
Formation of a glue-nanofiller layer between grains, consisting middle-temperature spinel-like Lix CoO2 phase, reinforces the strength incoherent interfacial binding anisotropically oriented grains by enhancing face-to-face adhesion strength. The cathode treated with glue-layer exhibits steady cycling performance at both room-temperature and 60 °C. These results represent step forward in advanced lithium-ion batteries via simple coating.
Binder-free and bifunctional electrocatalysts have vital roles in the development of high-performance metal–air batteries.
We show that a high energy density can be achieved in practical manner with freestanding electrodes without using conductive carbon, binders, and current collectors. made used folded graphene composite electrode designed for areal capacity anode. The traditional thick electrode, such as by filtering oxide to create thin film reducing it through chemical or thermal methods, has sluggish reaction kinetics. Instead, we have tested was several times water-assisted method; provides continuous...
Spinel-structured transition metal oxides are promising non-precious-metal electrocatalysts for oxygen electrocatalysis in rechargeable metal–air batteries. We applied porous cobalt manganese oxide (CMO) nanocubes as the cathode electrocatalyst seawater batteries, which a hybrid-type Na–air battery with an open-structured and catholyte. The CMO were synthesized by pyrolysis of Prussian blue analogue, Mn3[Co(CN)6]2·nH2O, during air-annealing, generated numerous pores between final spinel-type...
With the increasing demand of cost-effective and high-energy devices, sodium–air (Na–air) batteries have attracted immense interest due to natural abundance sodium in contrast lithium. In particular, an aqueous Na–air battery has fundamental advantage over non-aqueous formation highly water-soluble discharge product, which improve overall performance system terms energy density, cyclic stability round-trip efficiency. Despite these advantages, rechargeability not yet been demonstrated when...
Dye-sensitized photo-rechargeable battery (DSPB) harvests and stores dim light efficiently, realizing indoor-light-harvesting to operate IoT devices successfully without sun light.
Abstract High‐capacity Li‐rich layered oxide cathodes along with Si‐incorporated graphite anodes have high reversible capacity, outperforming the electrode materials used in existing commercial products. Hence, they are potential candidates for development of high‐energy‐density lithium‐ion batteries (LIBs). However, structural degradation induced by loss interfacial stability is a roadblock to their practical use. Here, use malonic acid‐decorated fullerene (MA‐C 60 ) superoxide dismutase...
A powerful synthetic protocol based on a molecularly engineered anchoring carbon platform (ACP) is reported to stabilize concentrated edge-hosted single-atom catalytic sites of M–N (M = Fe, Co, Ni, Cu) supports. Polymerization with l-cysteine as an additional organic precursor produces ACP sheath around the nanotube (CNT)–graphene (GR) hybrid support made small domain size abundant edge and doped sulfur. few-minute-long microwave pyrolysis anchors strongly single-atomic moiety while...