High‐Entropy Catalysis Accelerating Stepwise Sulfur Redox Reactions for Lithium–Sulfur Batteries

Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)

Published: June 17, 2024

Abstract Catalysis is crucial to improve redox kinetics in lithium–sulfur (Li–S) batteries. However, conventional catalysts that consist of a single metal element are incapable accelerating stepwise sulfur reactions which involve 16‐electron transfer and multiple Li 2 S n (n = 2–8) intermediate species. To enable fast Li–S batteries, it proposed use high‐entropy alloy (HEA) nanocatalysts, demonstrated effective adsorb lithium polysulfides accelerate their kinetics. The incorporation elements (Co, Ni, Fe, Pd, V) within HEAs greatly enhances the catalytically active sites, not only improves rate capability, but also elevates cycling stability assembled Consequently, HEA‐catalyzed batteries achieve high capacity up 1364 mAh g −1 at 0.1 C experience slight fading 0.054% per cycle over 1000 cycles C, while pouch cell achieves specific 1192 . superior performance demonstrates effectiveness HEA with maximized synergistic effect for conversion reactions, opens way improving electrochemical reactions.

Language: Английский

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Atom-Dominated Relay Catalysis of High-Entropy MXene Promotes Cascade Polysulfide Conversion for Lithium-Sulfur Batteries

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The high-entropy TiVNbMoC 3 MXene, with its atom-dominated relay catalysis effect and resilient lattice configuration, promotes a cascade of sulfur conversions guides uniform Li + deposition, enabling shuttle-free dendrite-free Li–S batteries.

Language: Английский

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High-Entropy Alloys in Catalysis: Progress, Challenges, and Prospects

ACS Materials Au, Journal Year: 2024, Volume and Issue: 4(6), P. 547 - 556

Published: Sept. 29, 2024

High-entropy alloys (HEAs) have become pivotal materials in the field of catalysis, offering unique advantages due to their diverse elemental compositions and complex atomic structures. Recent advances computational techniques, particularly density functional theory (DFT) machine learning (ML), significantly enhanced our understanding design HEAs for use catalysis. These innovative atomistic simulations shed light on properties HEAs, enabling discovery optimization catalysis solid-solution This Perspective discusses recent studies that illustrate progress It offers an overview properties, constraints, prospects emphasizing roles enhance catalytic activity selectivity. The discussion underscores capabilities as multifunctional catalysts with stable presented insights aim inspire future experimental efforts address challenges fine-tuning improved performance.

Language: Английский

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Order within disorder: Unveiling the potential of high entropy materials in energy storage and electrocatalysis

Energy storage materials, Journal Year: 2024, Volume and Issue: 72, P. 103718 - 103718

Published: Aug. 15, 2024

Language: Английский

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High Temperature Shock (HTS) Synthesis of Carbon‐Based Nanomaterials for Electrochemical Applications

Carbon Neutralization, Journal Year: 2025, Volume and Issue: 4(1)

Published: Jan. 1, 2025

ABSTRACT Carbon‐based nanomaterials play a significant role in the field of electrochemistry because their outstanding electrical conductivity, chemical and thermal resistance, structural flexibility, so on. In recent years, we have observed rapid rise research interest high‐temperature shock (HTS) method, which is fast, stable, environmentally friendly, versatile. The HTS method offers excellent controllability repeatability while tackling challenges limitations traditional preparation methods, providing new way to prepare optimize carbon‐based for electrochemical applications. During synthesis, reaction driven by high temperature further growth obtained nanoparticles inhibited heating cooling rates. has many advantages, including controlled carbon vacancy that may drive phase transformation, precise engineering carbon, other defects function as active centers, formation preservation metastable owing energy cooling, fine‐tuning interaction between loaded species support optimized performance, facile doping compounding induce synergy different constituents. This article provides comprehensive review various prepared applications during past decade, emphasizing synthesis principles performance. Studies showcasing merits HTS‐derived advancing Lithium‐ion batteries, Lithium‐sulfur Lithium‐air water‐splitting reaction, oxygen reduction CO 2 nitrate electrocatalytic reactions, fuel cells are highlighted. Finally, prospects recommended.

Language: Английский

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Unveiling the potential of high-entropy materials toward high-energy metal batteries based on conversion reactions: synthesis, structure, properties, and beyond

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104054 - 104054

Published: Jan. 1, 2025

Language: Английский

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Rapid Closed Pore Regulation of Biomass‐derived Hard Carbons Based on Flash Joule Heating for Enhanced Sodium Ion Storage

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Abstract Closed pores are essential for enhancing the low‐potential (<0.1 V) plateau capacity and initial Coulombic efficiency of hard carbon (HC) anode materials energy‐dense sodium‐ion batteries. However, lack simple effective closed‐pore construction strategies has severely hindered their future commercialization. Herein, a rapid regulation strategy biomass‐derived HCs is proposed through pre‐heat treatment followed by flash Joule heating (FJH). The critical transforming vulnerable biomass into high‐carbonizability frameworks that resistant to over‐graphitization. FJH helps generate enriched closed surrounded resulting walls with expanded interlayer spacing as accessible Na + channels. This shows remarkable universality applicability feedstocks, enabling conversion various carbonization‐vulnerable precursors high‐yield (e.g. HC600‐J‐1500 compared HC25‐J‐1500, ≈14‐fold yield increase) HCs. optimized sample demonstrates an outstanding reversible 377 mAh g −1 superior 93.3%, which stands in record value prepared even competitive via conventional carbonization. Comprehensive tests reveal efficient storage originates from pore‐filling mechanism nanopores. work suggests facile universal approach rational design high‐performance

Language: Английский

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TiO2-modified porous carbon fibers interlayer for long-cycling and high-rate lithium-sulfur batteries

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

An interlayer of TiO 2 nanoparticle-modified porous carbon fibers was developed, offering high polarity and excellent electrolyte wettability to significantly enhance sulfur cathode performance.

Language: Английский

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Machine Learning Assisted Design of High‐Entropy Alloy Interphase Layer for Lithium Metal Batteries

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract Lithium dendrite growth and the resulting safety concerns hinder application of lithium metal. Compared with single metal or medium entropy alloys, high‐entropy alloys (HEAs) are a promising solution to solve challenges anodes due their unique properties. However, designing HEA layer appropriate elements proportion has become obstacles. Herein, machine learning (ML), density functional theories (DFT) calculation data analysis reveal contribution Zn in lithiophilicity, Al hardness Fe, Co, Ni providing magnetism. The magnetron sputtering is used construct interphase layer, three parameters (sputtering power, time, substrate rotation speed) optimized via particle swarm optimization (PSO) based on logarithm average coulombic efficiency (CE) Li||Cu half cells. While high strength, compactness, flatness constructed, Li||Li symmetric cell assembled by HEA@Li at 1 mA cm −2 , mAh can cycle stably for 2400 h, discharge capacity retention rate Li||LFP >90% after 300 cycles C CE 99.67%. Design assisted ML provides path potential batteries.

Language: Английский

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High Entropy Metal Phosphide Activated Fluorinated Carbon as Electroactive Host for Extra High Cathode Capacity in Lithium–Sulfur Batteries

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Abstract Lithium–sulfur (Li–S) batteries are one of the most promising high‐energy battery systems due to high theoretical energy density (2600 Wh kg −1 ). However, a large proportion electro‐inert host materials typically employed in cathode composites, which severely reduces practical performance Li–S batteries. In this study, novel approach is proposed using fluorinated activated carbon (CF) as an electroactive sulfur for first time, can release extra capacity during initial operation. Specifically, with activation effect situ deposited entropy metal phosphide (HEP) catalyst Pd 0.34 Sn 0.15 Ni 0.05 Co 0.09 Cu 0.29 P 0.08 , HEP/CF almost 1.5 times higher than pristine CF. Consequently, S/HEP/CF exhibits discharge (1059.2 mAh g −composite at 0.1C), rate (476.5 2C) and long‐term cycling stability. Moreover, as‐prepared retains 492.6 under harsh conditions (sulfur loading 3.2 mg cm −2 lean electrolyte/sulfur ratio 10 µL This work demonstrates new strategy designing hosts improve

Language: Английский

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