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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20301 - Mechanical engineering
Result continuities
Project
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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