Synergistic Catalytic Effect of Multiple Active Sites in High-Entropy MAX Materials for Lithium Polysulfide Enables High-Performance Lithium-Sulfur Batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43933844" target="_blank" >RIV/60461373:22310/25:43933844 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acsaem.5c00854" target="_blank" >https://pubs.acs.org/doi/10.1021/acsaem.5c00854</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsaem.5c00854" target="_blank" >10.1021/acsaem.5c00854</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Synergistic Catalytic Effect of Multiple Active Sites in High-Entropy MAX Materials for Lithium Polysulfide Enables High-Performance Lithium-Sulfur Batteries

Popis výsledku v původním jazyce

The commercialization of lithium-sulfur batteries (LSBs) is limited by slow kinetics and the detrimental shuttle effect of lithium polysulfides (LiPSs), which impede their practical application. This study addresses these issues by exploring the use of high-entropy MAX phases (NbVMoTiAlC3 and CrVMoTiAlC3) as cathode additives. Through high-temperature ball milling, two types of MAX phases are synthesized, and their roles in enhancing the electrochemical performance of LSBs are systematically evaluated. The study finds that Nb-based MAX phases exhibit stronger interactions between transition metals, which significantly improve the electrical conductivity and chemical stability compared to Cr-based MAX phases. These unique properties enable NbVMoTiAlC3 to enhance Li+ migration kinetics and improve sulfur species utilization efficiency. In situ ultraviolet-visible spectroscopy further shows that NbVMoTiAlC3 promotes the catalytic conversion of LiPSs, increasing the number of S3 center dot- radicals. As a result, the cell with NbVMoTiAlC3@CNT/S exhibits a high capacity retention of 85.29% after 100 cycles under a sulfur loading of 3.85 mg cm-2 and a low capacity decay rate of 0.088% after 500 cycles at 3 C. This work demonstrates the potential of MAX-phase materials to overcome key challenges in LSBs, offering insights for the development of high-performance energy storage systems.

Název v anglickém jazyce

Synergistic Catalytic Effect of Multiple Active Sites in High-Entropy MAX Materials for Lithium Polysulfide Enables High-Performance Lithium-Sulfur Batteries

Popis výsledku anglicky

The commercialization of lithium-sulfur batteries (LSBs) is limited by slow kinetics and the detrimental shuttle effect of lithium polysulfides (LiPSs), which impede their practical application. This study addresses these issues by exploring the use of high-entropy MAX phases (NbVMoTiAlC3 and CrVMoTiAlC3) as cathode additives. Through high-temperature ball milling, two types of MAX phases are synthesized, and their roles in enhancing the electrochemical performance of LSBs are systematically evaluated. The study finds that Nb-based MAX phases exhibit stronger interactions between transition metals, which significantly improve the electrical conductivity and chemical stability compared to Cr-based MAX phases. These unique properties enable NbVMoTiAlC3 to enhance Li+ migration kinetics and improve sulfur species utilization efficiency. In situ ultraviolet-visible spectroscopy further shows that NbVMoTiAlC3 promotes the catalytic conversion of LiPSs, increasing the number of S3 center dot- radicals. As a result, the cell with NbVMoTiAlC3@CNT/S exhibits a high capacity retention of 85.29% after 100 cycles under a sulfur loading of 3.85 mg cm-2 and a low capacity decay rate of 0.088% after 500 cycles at 3 C. This work demonstrates the potential of MAX-phase materials to overcome key challenges in LSBs, offering insights for the development of high-performance energy storage systems.

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

ACS Applied Energy Materials

ISSN

2574-0962

e-ISSN

2574-0962

Svazek periodika

8

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

7538-7550

Kód UT WoS článku

001497993400001

EID výsledku v databázi Scopus

2-s2.0-105006695127