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Ti3C2Tx nanosheet@Cu/Fe-MOF separators for high-performance lithium-sulfur batteries: an experimental and density functional theory study

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F23%3A00369437" target="_blank" >RIV/68407700:21220/23:00369437 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1039/D3DT03134A" target="_blank" >https://doi.org/10.1039/D3DT03134A</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1039/D3DT03134A" target="_blank" >10.1039/D3DT03134A</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Ti3C2Tx nanosheet@Cu/Fe-MOF separators for high-performance lithium-sulfur batteries: an experimental and density functional theory study

  • Original language description

    Lithium-sulfur (Li-S) batteries have attracted much attention due to their superior theoretical specific capacity and high theoretical energy density. However, rapid capacity fading originating from the shuttle effect, insulating the S cathode and the dendritic formation on the Li anode restrict the practical applications of Li-S batteries. Herein, we suggest novel coatings on glass fiber separators to satisfy all high-performance Li-S battery requirements. A conductive Ti3C2Tx (MXene) nanosheet/ Fe-MOF or Ti3C2Tx (MXene) nanosheet/ Cu-MOF layer was coated on a glass fiber separator to act as a polysulfides trapping layer. The MXenes layer with high conductivity and polar surface functional groups could confine polysulfides and accelerate the redox conversions. The porous MOF layer acts as a Li ion sieve, thereby leading to the interception of polysulfides and mitigation of Li dendrite growth. The cells with the Cu-MOF/MXenes and Fe-MOF/MXenes separators display superior capacities of 1100 and 1131 mA h g-1 after 300 cycles respectively whereas the cell with pure glass fiber separator delivers very low capacity of 309 mA h g-1 after 300 cycles. With Fe-MOF/MXenes and Cu-MOF/MXenes configurations, the discharge capacity, Coulombic efficiency, cycling stability, and electrochemical conversion reactions are significantly improved. Our ab initio calculations demonstrate that the MXene layer dissociates lithium polysulfides into adsorbed S and mobile Li ions, which explains the experimental findings.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20301 - Mechanical engineering

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Dalton Transactions

  • ISSN

    1477-9226

  • e-ISSN

    1477-9234

  • Volume of the periodical

    2023

  • Issue of the periodical within the volume

    11

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    11

  • Pages from-to

    82-92

  • UT code for WoS article

    001111499600001

  • EID of the result in the Scopus database

    2-s2.0-85180411690