MOF-74(M) (M = Mg(II), Fe(II), Ni(II)) frameworks to enable accelerated redox kinetics for Li-S batteries

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F26%3A0201305" target="_blank" >RIV/00216305:26220/26:0201305 - isvavai.cz</a>

Result on the web

<a href="https://www.nature.com/articles/s41598-025-22340-4" target="_blank" >https://www.nature.com/articles/s41598-025-22340-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-025-22340-4" target="_blank" >10.1038/s41598-025-22340-4</a>

Result language

angličtina

Original language name

MOF-74(M) (M = Mg(II), Fe(II), Ni(II)) frameworks to enable accelerated redox kinetics for Li-S batteries

Original language description

This study presents the development of a composite electrode material for lithium-sulphur (Li-S) batteries, combining MOF-74 with carbon black and sulphur. The MOF-74 structures, incorporating Ni(II), Mg(II), and Fe(II) metal ions, were synthesized via a solvothermal method and used to encapsulate sulphur. The microporous nature of MOF-74 facilitates the physical confinement and storage of sulphur, potentially enhancing the performance of Li-S batteries. The investigation focuses on how different central metal ions in MOF-74 influence the performance of sulphur-based electrodes. Among the metal ions studied, Fe(II) and Mg(II) were selected for their low toxicity, cost-effectiveness, and availability, while Ni(II) was included for its high catalytic properties. The materials were thoroughly characterized using infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, powder X-ray diffraction, elemental analysis and X-ray photoelectron spectroscopy. The thermal stability and textural properties of the materials were assessed, showing that MOF-74(Mg) exhibited the highest stability, followed by MOF-74(Ni) and MOF-74(Fe). Nitrogen adsorption/desorption measurements indicated that the specific surface area and pore volume varied with activation temperature, impacting the material's performance. Among the tested materials, MOF-74(Ni) exhibited the strongest interaction with sulfur, as confirmed by XPS analysis. Electrochemical tests revealed that the S/MOF-74(Ni) electrode demonstrated superior stability and capacity retention with a minimal capacity fading rate of 0.001% per cycle over 200 cycles, achieving a reversible capacity of 465 mAh g-1 and a capacity retention of 99.75%. In contrast, the S/MOF-74(Fe) electrode showed significantly reduced performance. A structure-performance correlation was established to assess sulfur interaction, electrode stability, and degradation behavior. Overall, the results highlight that MOF-74(Ni) offers the most promising performance due to its effective sulphur immobilization and superior electrochemical properties compared to MOF-74(Mg) and MOF-74(Fe).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10700 - Other natural sciences

Project

<a href="/en/project/EH22_008%2F0004617" target="_blank" >EH22_008/0004617: Energy conversion and storage</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

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

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

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Volume of the periodical

15

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

21

Pages from-to

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UT code for WoS article

001608125700005

EID of the result in the Scopus database

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