High Rate and Long-Cycle Life of Lithium–Sulfur Battery Enabled by High d-Band Center of High-Entropy Alloys

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Efficient catalysis of intermediate lithium polysulfide (LiPS) conversion in lithium-sulfur batteries is crucial for enhancing sulfur reduction reaction (SRR) kinetics and suppressing the shuttle effect LiPSs. High-entropy alloys (HEAs), with their compositional flexibility, structural diversity, multielement synergy, are promising high-efficiency catalyst candidates. Herein, a work function-dominated d-band center rule proposed to modulate chemical absorption ability LiPSs catalytic performance HEA catalysts. The as-screened PtCuFeCoNi HEAs (PCFCN-HEAs) modulated via distinct functions its five metallic elements. In addition, detailed density functional theory (DFT) calculations X-ray spectroscopy performed reveal roles individual elements HEAs. Optimizing PCFCN-HEAs notably enhances adsorption accelerates SRR. PCFCN-HEA nanoparticles deposited on surface hollow carbon spheres (HCSs) they combine hyphae nanobelts (HCNBs) form PCFCN-HEA/HCS/HCNB composite as host. cathode PCNFC-HEA exhibits stable cycling at 6C delivers high reversible capacity 652 mAh g-1 even rate 8C. DFT further elucidate stepwise mechanism PCFCN-HEAs, offering pathway designing

Language: Английский

Synthesis of Ilmenite-Derived TiO2 Photocatalysts with Different Morphologies: Enhanced Photocatalytic Activity using Ammonium Hexafluorotitanate

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Modifying Separators with a Multistrategy-Constructed (ZnCo)₃S₄–MoS₂ Heterostructure for High-Performance Lithium–Sulfur Batteries

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Language: Английский