A5010802792- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced battery technologies research
- Advanced Battery Technologies Research
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Copper Interconnects and Reliability
- Supercapacitor Materials and Fabrication
- Polyoxometalates: Synthesis and Applications
- Graphene research and applications
- X-ray Diffraction in Crystallography
- Chalcogenide Semiconductor Thin Films
- Advanced Memory and Neural Computing
- Crystallography and molecular interactions
- Catalysis and Oxidation Reactions
- Agriculture, Soil, Plant Science
- Electrochemical Analysis and Applications
- Thermal Expansion and Ionic Conductivity
- Electrodeposition and Electroless Coatings
- Gas Sensing Nanomaterials and Sensors
- Advanced Fiber Optic Sensors
- Humic Substances and Bio-Organic Studies
- TiO2 Photocatalysis and Solar Cells
- Semiconductor materials and interfaces
- Neuroscience and Neural Engineering
Lawrence Berkeley National Laboratory
2022-2025
Seoul National University
2016-2023
Government of the Republic of Korea
2016-2021
East Asia School of Theology
2021
Institute for Basic Science
2018-2019
Kookmin University
2002
All-solid-state batteries are a potential game changer in the energy storage market; however, their practical employment has been hampered by premature short circuits caused lithium dendritic growth through solid electrolyte. Here, we demonstrate that rational layer-by-layer strategy using lithiophilic and electron-blocking multilayer can substantially enhance performance/stability of system effectively blocking electron leakage maintaining low electronic conductivity even at high...
Lithium dendrite growth in solid electrolytes is one of the major obstacles to commercialization solid-state batteries based on garnet-type electrolytes. Herein, we propose a strategy that can simultaneously resolve both interface and electronic conductivity issues via simple one-step procedure provides multilayer protection at low temperature. We take advantage facile chemical conversion reaction, showing wet-coated SnF2 particles electrolyte effectively produces multifunctional composed...
Abstract Li‐O 2 batteries are promising next‐generation energy storage systems because of their exceptionally high density (≈3500 W h kg −1 ). However, to achieve stable operation, grand challenges remain be resolved, such as preventing electrolyte decomposition and degradation carbon, a commonly used air electrode in batteries. In this work, using situ differential electrochemical mass spectrometry, it is demonstrated that the application ZnO coating on carbon can effectively suppress side...
The structural design and synthesis of effective cathode catalysts are important concerns for achieving rechargeable Li-O2 batteries. In this study, hexagonal Co3O4 nanoplatelets coated with MnO2 were synthesized as bifunctional oxygen reduction reaction catalyst (MnO2) was closely integrated on the surface evolution (hexagonal Co3O4) so that hetero-structured (HSC) hybrid would show catalytic activity in A facile route developed to form a unique HSC structure, {111} facet-exposed decorated...
Li-O2 battery is one of the important next-generation energy storage systems, as it can potentially offer highest theoretical density among chemistries reported thus far. However, realization its high discharge capacity still remains challenging and hampered by nature how products are formed, causing premature passivation air electrode. Redox mediators exploited to solve this problem, they promote charge transfer from electrodes solution phase. The mechanistic understanding fundamental...
Despite their potential to provide high energy densities, lithium–oxygen (Li–O2) batteries are not yet widely used in ultrahigh density devices like electric vehicles, owing various challenges, including poor cyclability, low efficiency, and rate capability, especially at areal mass loading. Even the most promising Li–O2 cells unsuitable for practical applications, a limited loading below 1 mg cm–2, resulting capacity. Here, we demonstrate air cathodes of unprecedentedly capacity with...
ConspectusWith the ever-increasing demand on energy storage systems and subsequent mass production, there is an urgent need for development of batteries with not only improved electrochemical performance but also better sustainability-related features such as environmental friendliness low production cost. To date, transition metals that are sparse have been centrally employed in devices ranging from portable lithium ion (e.g., cobalt nickel) to large-scale redox flow vanadium). Toward...
A new bipolar-type redox-active organic material with a wide HOMO–LUMO energy gap is designed though the ‘p–n fusion’ strategy.
Lithium-rich layered oxides, despite their potential as high-energy-density cathode materials, are impeded by electrochemical performance deterioration upon anionic redox. Although this is believed to primarily result from structural disordering, our understanding of how it triggered and/or occurs remains incomplete. Herein, we propose a theoretical picture that clarifies the irreversible transformation and redox asymmetry lithium-rich oxides introducing series global local dynamic evolution...
Abstract Governing the fundamental reaction in lithium–oxygen batteries is vital to realizing their potentially high energy density. Here, novel oxygen reduction (ORR) catalysts capable of mediating lithium and within a solution‐driven discharge, which promotes solution‐phase formation peroxide (Li 2 O ), are reported, thus enhancing discharge capacity. The new derived from mimicking biological redox mediation electron transport chain Escherichia coli , where vitamin K2 mediates oxidation...
We present a facile, up-scalable and cost-effective strategy to prepare defect-laden holey graphene counterparts for energy-related applications.
Abstract Shedding new light on conventional batteries sometimes inspires a chemistry adoptable for rechargeable batteries. Recently, the primary lithium-sulfur dioxide battery, which offers high energy density and long shelf-life, is successfully renewed as promising system exhibiting small polarization good reversibility. Here, we demonstrate first time that reversible operation of battery also possible by exploiting carbonate-based electrolytes. Theoretical experimental studies reveal...
Redox mediators (RMs) are considered an effective countermeasure to reduce the large polarization in lithium-oxygen batteries. Nevertheless, achieving sufficient enhancement of cyclability is limited by trade-offs freely mobile RMs, which beneficial for charge transport but also trigger shuttling phenomenon. Here, we successfully decoupled charge-carrying redox property RMs and phenomenon anchoring polymer form, where physical RM migration was replaced transfer along chains. Using PTMA...
Here, we advance electrode-omics to identify evolutionary bursts by which ethereal mixed-salt locally superconcentrated electrolytes (LSCE) containing lithium bis(fluorosulfonyl)imide (LiFSI) and LiClO4 mitigate silicon anode degradation through its epochs of electrochemical chemical reactions.
For the realization of high-power lithium–oxygen batteries, a comparative study was conducted to investigate kinetic properties redox mediators.
Deconstructing solid-state batteries (SSBs) to physically separated cathode and solid-electrolyte particles remains intensive, as does the remanufacturing of cathodes separators from recovered materials. To address this challenge, we designed supramolecular organo-ionic (ORION) electrolytes that are viscoelastic solids at battery operating temperatures (−40° 45°C) yet liquids above 100°C, which enables both fabrication high-quality SSBs recycling their end life. implementing ORION alongside...