Research Highlight

Atachment
첨부 '2'
Extra Form
author Kyungwon Kwak, Minhaeng Cho
journal ACS Energy Letters
Homepage https://kkwaklab.wixsite.com/quantspeclab
?

단축키

Prev이전 문서

Next다음 문서

크게 작게 위로 아래로 댓글로 가기 인쇄
?

단축키

Prev이전 문서

Next다음 문서

크게 작게 위로 아래로 댓글로 가기 인쇄

김준규.jpg

 

김준규(제1저자, 통합과정)

 

Superconcentrated aqueous electrolytes have shown promise as safe and high-voltage lithium-ion battery (LIB) electrolytes. However, the interplay of lithium-ion solvation structure and dynamics with fast Li-ion transport has not been elucidated yet. Here, we combine the ultrafast femtosecond mid-IR spectroscopy, dielectric relaxation spectroscopy, pulsed-field gradient NMR, and molecular dynamics simulation for investigating the solvation structure and Li-ion transport mechanism in superconcentrated aqueous electrolytes. We found the existence of water molecules with vibrational and rotational properties very similar to those of bulk water, even at extremely high salt concentrations (28 m). Our experimental results show that the electrolytes have a heterogeneous solvation environment, and bulk-like water molecules promote fast Li-ion transport. We anticipate that the molecular understanding of the superconcentrated aqueous electrolytes obtained here would facilitate the design of solvation structures to overcome the limit of dilute LIB electrolytes.

 

김준규 그림.jpg

 

 

https://pubs.acs.org/doi/10.1021/acsenergylett.1c02012

 

 


  1. Thermopower of Molecular Junction in Harsh Thermal Environments

    Molecular junctions can be miniaturized devices for heat-to-electricity conversion application, yet these operate only in mild thermal environments (less than 323 K) because thiol, the most widely used anchor moiety for chemisorption of act...
    Read More
  2. Microfluidics-Assisted Synthesis of Hierarchical Cu2O Nanocrystal as C2-Selective CO2 Reduction Electrocatalyst

    Copper-based catalysts have attracted enormous attention due to their high selectivity for C2+ products during the electrochemical reduction of CO2 (CO2RR). In particular, grain boundaries on the catalysts contribute to the generation of va...
    Read More
  3. Chemical Fields: Directing Atom Migration in the Multiphasic Nanocrystal

    Atoms in a bulk solid phase are usually trapped to fixed positions and can change their position only under certain conditions (e.g., at a melting point) due to the high energy barrier of migration between positions within the crystal latti...
    Read More
  4. Electronic Mechanism of In Situ Inversion of Rectification Polarity in Supramolecular Engineered Monolayer

    This paper describes polarity inversion in molecular rectification and the related mechanism. Using supramolecular engineered, ultrastable binary mixed self-assembled monolayer (SAM) composed of organic molecular diode (SC11BIPY) and inert ...
    Read More
  5. Direct observation of protein structural transitions through entire amyloid aggregation processes in water using 2D-IR spectroscopy

    Amyloid proteins that undergo self-assembly to form insoluble fibrillar aggregates have attracted much attention due to their role in biological and pathological significance in amyloidosis. This study aims to understand the amyloid aggrega...
    Read More
  6. Harnessing GLUT1-Targeted Pro-oxidant Ascorbate for Synergistic Phototherapeutics

    Despite extensive efforts to realize effective photodynamic therapy (PDT), there is still a lack of therapeutic approaches concisely structured to mitigate the major obstacles of PDT in clinical applications. Herein, we report a molecular s...
    Read More
  7. DNA-Damage-Response-Targeting Mitochondria-Activated Multifunctional Prodrug Strategy for Self-Defensive Tumor Therapy

    We report a novel multifunctional construct, M1, designed explicitly to target the DNA damage response in cancer cells. M1 contains both a floxuridine (FUDR) and protein phosphatase 2A (PP2A) inhibitor combined with a GSH-sensitive linker. ...
    Read More
  8. Midwavelength Infrared Colloidal Nanowire Laser

    Realizing bright colloidal infrared emitters in the midwavelength infrared (or mid-IR), which can be used for low-power IR light-emitting diodes (LEDs), sensors, and deep-tissue imaging, has been a challenge for the last few decades. Here, ...
    Read More
  9. Kinetic Modulation of Amyloid-β (1–42) Aggregation and Toxicity by Structure-Based Rational Design

    임동준 (제1저자, 통합과정생) Several point mutations can modulate protein structure and dynamics, leading to different natures. Especially in the case of amyloidogenic proteins closely related to neurodegenerative diseases, structural chang...
    Read More
  10. Safeguarding the RuO2 phase against lattice oxygen oxidation during acidic water electrooxidation

    Defective RuO2 possesses excellent initial activity toward the oxygen evolution reaction in acidic water electrooxidation due to the involvement of lattice oxygens, which, however, is the very reason for the accelerated dissolution of Ru sp...
    Read More
  11. Mn-dopant differentiating the Ru and Ir oxidation states in catalytic oxides toward durable oxygen evolution reaction in acidic electrolyte

    Designing an efficient and durable electrocatalyst for the sluggish oxygen evolution reaction (OER) at the anode remains the foremost challenge in developing proton exchange membrane (PEM) electrolyzers. Here we report a highly active and d...
    Read More
  12. Dynamic Water Promotes Lithium-Ion Transport in Superconcentrated and Eutectic Aqueous Electrolytes

    김준규(제1저자, 통합과정) Superconcentrated aqueous electrolytes have shown promise as safe and high-voltage lithium-ion battery (LIB) electrolytes. However, the interplay of lithium-ion solvation structure and dynamics with fast Li-ion tra...
    Read More
  13. Isomeric sp2-C conjugated Porous Organic Polymer-mediated Photo- and Sono-catalytic Detoxification of Sulfur Mustard Simulant under Ambient Conditions

    The development of efficient strategies for the sustainable detoxification of mustard gas simulants has longstanding demand for human safety. Here, we present for the first time a photo- and sono-catalyzed selective detoxification of mustar...
    Read More
  14. Vertical-crystalline Fe-doped β-Ni oxyhydroxides for highly active and stable oxygen evolution reaction

    김병윤 (제1저자, 기초과학연구원) The layered transition metal oxyhydroxides have received increasing interest owing to the efficient energy conversion performance and material stability during the oxygen evolution reaction (OER). In particu...
    Read More
  15. Extended Short-Wavelength Infrared Photoluminescence and Photocurrent of Nonstoichiometric Silver Telluride Colloidal Nanocrystals

    김가현(제1저자, 석박통합과정) Demands on nontoxic nanomaterials in the short-wavelength infrared (SWIR) have rapidly grown over the past decade. Here, we present the nonstoichiometric silver chalcogenide nanocrystals of AgxTe (x > 2) and Ag...
    Read More
  16. Enhanced Thermopower of Saturated Molecules by Noncovalent Anchor-Induced Electron Doping of Single-Layer Graphene Electrode

    Enhancing thermopower is a key goal in organic and molecular thermoelectrics. Herein, it is shown that introducing noncovalent contact with a single-layer graphene (SLG) electrode improves the thermopower of saturated molecules as compared ...
    Read More
  17. Mechanical Force for the Transformation of Aziridine into Imine

    Force-selective mechanochemical reactions may be important for applications in polymer mechanochemistry, yet it is difficult to achieve such reactions. This paper reports that cis-N-phthalimidoaziridine incorporated into a macromolecular ba...
    Read More
  18. A Small Molecule Strategy for Targeting Cancer Stem Cells in Hypoxic Microenvironments and Preventing Tumorigenesis

    김지현(제1저자, 석박사통합과정 8학기) Breast cancer consists of heterogenic subpopulations, which determine the prognosis and response to chemotherapy. Among these subpopulations, a very limited number of cancer cells are particularly probl...
    Read More
  19. Mitochondria-targeted nanotheranostic: Harnessing single-laser-activated dual phototherapeutic processing for hypoxic tumor treatment

    Realizing maximum tumor suppression along with preventing tumor regrowth by optimizing the photon usage in phototherapy remains a major challenge. Herein, a mitochondria-targeted phototheranostic nanoformulation (MsPDTT NPs) was prepared fr...
    Read More
  20. Pd3Pb Nanosponges for Selective Conversion of Furfural to Furfuryl Alcohol under Mild Condition

    Alloy structures with high catalytic surface areas and tunable surface energies can lead to high catalytic selectivity and activities. Herein, the synthesis of sponge-like Pd3Pb multiframes (Pd3Pb MFs) is reported by using the thermodynamic...
    Read More
Board Pagination Prev 1 2 3 4 5 6 7 8 Next
/ 8