Strengthened d–p Orbital Hybridization on Metastable Cubic Mo₂C for Highly Stable Lithium–Sulfur Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 13, 2024

Suppressing the lithium polysulfide (LiPS) shuttling as well accelerating conversion kinetics is extremely crucial yet challenging in designing sulfur hosts for lithium–sulfur (Li–S) batteries. Phase engineering of nanomaterials an intriguing approach tuning electronic structure toward regulating phase-dependent physicochemical properties. In this study, a metastable phase δ-Mo2C catalyst was elaborately synthesized via boron doping strategy, which exhibited transfer from hexagonal to cubic structure. The hierarchical tubular δ-Mo2C-decorated N-doped carbon nanotube (δ-B-Mo2C/NCNT) endows fast electron and abundant polar sites LiPSs. First-principles calculations reveal strengthened chemical adsorption capability hybridization between d orbital Mo metal p S atoms LiPSs, contributing higher electrocatalytic activity. Moreover, situ Raman analysis manifests accelerated redox kinetics. Consequently, δ-B-Mo2C/NCNT renders Li–S battery with high specific capacity 1385.6 mAh g–1 at 0.1 C superior rate property 606.3 4 C. Impressively, satisfactory areal 6.95 cm–2 achieved under loading 6.8 mg cm–2. This work has gained research significance design

Language: Английский

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A Review of the Application of Metal-Based Heterostructures in Lithium–Sulfur Batteries

Catalysts, Journal Year: 2025, Volume and Issue: 15(2), P. 106 - 106

Published: Jan. 22, 2025

Lithium–sulfur (Li-S) batteries are recognized as a promising alternative in the energy storage domain due to their high theoretical density, environmental friendliness, and cost-effectiveness. However, challenges such polysulfide dissolution, low conductivity of sulfur, limited cycling stability hinder widespread application. To address these issues, incorporation heterostructured metallic substrates into Li-S has emerged pivotal strategy, enhancing electrochemical performance by facilitating better adsorption catalysis. This review delineates modifications made cathode separator through heterostructures. We categorize heterostructures three classifications: single metals metal compounds, MXene materials paired with formed entirely compounds. Each category is systematically examined for its contributions behavior efficiency batteries. The evaluated both contexts, revealing significant improvements lithium-ion retention. Our findings suggest that strategic design can not only mitigate inherent limitations but also pave way development high-performance systems.

Language: Английский

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Application of Y-Zn-MOF derived Y2O3/ZnO@C in modification of lithium-sulfur battery separator

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 101, P. 113833 - 113833

Published: Sept. 23, 2024

Language: Английский

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Dual design strategy of carbon nanotubes-modified mixed-phase selenide for high-performance Li S batteries

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 100, P. 113648 - 113648

Published: Sept. 6, 2024

Language: Английский

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Ni12P5 nanoparticles anchored P, N co-doped carbon nanosheets modified separators for superior lithium‑sulfur battery

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 99, P. 113270 - 113270

Published: Aug. 18, 2024

Language: Английский

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CoSe2 modified sea-cucumber-like nitrogen-doped carbon tubes composed of nanosheets as a superior electrocatalyst for polysulfide conversion in advanced Li S batteries

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 110, P. 115293 - 115293

Published: Jan. 5, 2025

Language: Английский

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Influence of the amount of sulfur supported on sustainable ordered mesoporous carbons from tannin for high-performance electrodes in lithium‒sulfur batteries

Microporous and Mesoporous Materials, Journal Year: 2025, Volume and Issue: unknown, P. 113530 - 113530

Published: Feb. 1, 2025

Language: Английский

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Accelerating sulfur reduction kinetics through establishing a balancing network in adsorption-catalysis-conversion of polysulfide by sulfur-affinity metal iron

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 687, P. 353 - 364

Published: Feb. 11, 2025

Language: Английский

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Zinc‐Doping‐Induced Electronic States Modulation of Molybdenum Carbide: Expediting Rate‐Determining Steps of Sulfur Conversion in Lithium‐Sulfur Batteries

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 31, 2025

Abstract Enhancing Li 2 S deposition and oxidation kinetics in lithium‐sulfur batteries, especially the potential‐limiting step under lean electrolyte, can be effectively achieved by developing conductive catalysts. In this study, using ZnMoO 4 as precursors, Zn‐doped molybdenum carbide microflowers (Zn‐Mo C) composed of speared porous sheets are fabricated with a hierarchically ordered structure. Density functional theory calculations indicate that Zn doping shifts d‐band center on Mo atoms C upward, promotes elevation certain antibonding orbitals Mo─S bonds above Fermi level, enhances d‐p interaction between lithium polysulfides (LiPSs) catalysts, weakens both S─S Li─S LiPSs. Incorporating significantly reduces Gibbs free energy barrier for rate‐limiting → conversion, from 0.52 eV to just 0.05 C. Thus, synthesized Zn‐Mo demonstrates impressive bifunctional electrocatalytic performance, advancing sulfur reduction decomposition. Moreover, modification charge transfer within C/LiPSs system, synergistically accelerating oxidation. The C/S cathode electrochemical achieves remarkable cycling stability minimal capacity decay 0.021% per cycle over 1000 cycles at 5 C, underscoring its potential high‐energy applications.

Language: Английский

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Electronic structure regulation of Fe3C neighbored Fe-N4 ensembles enables optimized redox-cascade electrocatalysis for high-performance lithium-sulfur batteries

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163125 - 163125

Published: April 1, 2025

Language: Английский

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