Structural engineering of MXene frameworks with abundant surface functionalities for enhanced lithium-sulfur battery electrochemistry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43933845" target="_blank" >RIV/60461373:22310/25:43933845 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlehtml/2025/qi/d5qi00422e" target="_blank" >https://pubs.rsc.org/en/content/articlehtml/2025/qi/d5qi00422e</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d5qi00422e" target="_blank" >10.1039/d5qi00422e</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural engineering of MXene frameworks with abundant surface functionalities for enhanced lithium-sulfur battery electrochemistry

Popis výsledku v původním jazyce

Two-dimensional MXene materials have garnered significant attention in lithium-sulfur battery (LSBs) research due to their inherent high electrical conductivity and exceptional catalytic activity, which help mitigate the intrinsic challenges of sluggish redox kinetics and polysulfide shuttling. However, systematic investigations into the correlation between the structural evolution of MXene-based electrodes and their electrochemical performance remain underdeveloped. In this study, Ti3C2Tx and Ti2CTx are fabricated via a top-down method, and their performance differences in LSBs are compared. Due to its unique three-layer titanium atomic structure and rich surface functional groups (-OH, -O, -F, etc.), Ti3C2Tx exhibits excellent conductivity and chemical stability. Electrochemical testing and in situ ultraviolet-visible spectroscopy analysis show that Ti3C2Tx effectively suppresses the polysulfide shuttle effect and accelerates the redox conversion of sulfur species. The cell using Ti3C2Tx as a separator exhibits a capacity decay rate of 0.085% at 2 C after 200 cycles, and it maintains stable cycling at 60 degrees C, in contrast to Ti2CTx, which fails after 50 cycles. This study highlights how structural differences in MXene materials influence the electrochemical behavior of LSBs, providing new insights and establishing a foundation for their application in high-performance LSBs.

Název v anglickém jazyce

Structural engineering of MXene frameworks with abundant surface functionalities for enhanced lithium-sulfur battery electrochemistry

Popis výsledku anglicky

Two-dimensional MXene materials have garnered significant attention in lithium-sulfur battery (LSBs) research due to their inherent high electrical conductivity and exceptional catalytic activity, which help mitigate the intrinsic challenges of sluggish redox kinetics and polysulfide shuttling. However, systematic investigations into the correlation between the structural evolution of MXene-based electrodes and their electrochemical performance remain underdeveloped. In this study, Ti3C2Tx and Ti2CTx are fabricated via a top-down method, and their performance differences in LSBs are compared. Due to its unique three-layer titanium atomic structure and rich surface functional groups (-OH, -O, -F, etc.), Ti3C2Tx exhibits excellent conductivity and chemical stability. Electrochemical testing and in situ ultraviolet-visible spectroscopy analysis show that Ti3C2Tx effectively suppresses the polysulfide shuttle effect and accelerates the redox conversion of sulfur species. The cell using Ti3C2Tx as a separator exhibits a capacity decay rate of 0.085% at 2 C after 200 cycles, and it maintains stable cycling at 60 degrees C, in contrast to Ti2CTx, which fails after 50 cycles. This study highlights how structural differences in MXene materials influence the electrochemical behavior of LSBs, providing new insights and establishing a foundation for their application in high-performance LSBs.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Inorganic Chemistry Frontiers

ISSN

2052-1553

e-ISSN

2052-1553

Svazek periodika

12

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

5479-5492

Kód UT WoS článku

001481613600001

EID výsledku v databázi Scopus

2-s2.0-105004900501