Nanoreactors Encapsulating Built‐in Electric Field as a “Bridge” for Li–S Batteries: Directional Migration and Rapid Conversion of Polysulfides

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(9)

Published: Dec. 27, 2023

Abstract Lithium–sulfur batteries (Li–S) are recognized as the next generation of secondary due to their satisfactory theoretical specific capacity and energy density. However, a series problems such disordered migration behavior, sluggish redox kinetics, serious shuttle effect lithium polysulfides (LiPSs) greatly limit commercial application. Herein, nanoreactors encapsulate heterostructure guarantee sulfur conversion in hosts where consists FeP with moderate adsorption ability, excellent catalytic active low work function, Fe 3 O 4 strong ability high function. This rational configuration controls direction interface built‐in electric field (BIEF) between catalyst adsorbent, realizing successive “trapping‐directional migration‐conversion” reaction mechanism species. Thanks BIEF bridge connect trapping site site, /FeP@C─S cathode delivers an ultrahigh initial 1402 mAh g −1 at 0.1 C remains more than 450 5 after 350 cycles. Even loading 5.20 mg cm −2 , it displayed 970 . provided effective strategy design high‐performance electrocatalysts for Li–S batteries.

Language: Английский

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Interface engineering toward stable lithium–sulfur batteries

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(4), P. 1330 - 1367

Published: Jan. 1, 2024

The interfaces, interfacial issues, and their impact on lithium–sulfur electrochemistry are overviewed for both coin cells practical batteries.

Language: Английский

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Rechargeable Metal-Sulfur Batteries: Key Materials to Mechanisms

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(8), P. 4935 - 5118

Published: April 10, 2024

Rechargeable metal-sulfur batteries are considered promising candidates for energy storage due to their high density along with natural abundance and low cost of raw materials. However, they could not yet be practically implemented several key challenges: (i) poor conductivity sulfur the discharge product metal sulfide, causing sluggish redox kinetics, (ii) polysulfide shuttling, (iii) parasitic side reactions between electrolyte anode. To overcome these obstacles, numerous strategies have been explored, including modifications cathode, anode, electrolyte, binder. In this review, fundamental principles challenges first discussed. Second, latest research on is presented discussed, covering material design, synthesis methods, electrochemical performances. Third, emerging advanced characterization techniques that reveal working mechanisms highlighted. Finally, possible future directions practical applications This comprehensive review aims provide experimental theoretical guidance designing understanding intricacies batteries; thus, it can illuminate pathways progressing high-energy-density battery systems.

Language: Английский

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Chlorine bridge bond-enabled binuclear copper complex for electrocatalyzing lithium–sulfur reactions

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 15, 2024

Abstract Engineering atom-scale sites are crucial to the mitigation of polysulfide shuttle, promotion sulfur redox, and regulation lithium deposition in lithium–sulfur batteries. Herein, a homonuclear copper dual-atom catalyst with proximal distance 3.5 Å is developed for batteries, wherein two adjacent atoms linked by pair symmetrical chlorine bridge bonds. Benefiting from their unique coordination, increased active interface concentration synchronously guide evolutions species. Such delicate design breaks through activity limitation mononuclear metal center represents concept battery realm. Therefore, remarkable areal capacity 7.8 mA h cm −2 achieved under scenario content 60 wt. %, mass loading 7.7 mg electrolyte dosage 4.8 μL −1 .

Language: Английский

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Atomic dynamics of electrified solid–liquid interfaces in liquid-cell TEM

Nature, Journal Year: 2024, Volume and Issue: 630(8017), P. 643 - 647

Published: June 19, 2024

Language: Английский

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Graphic, Quantitation, Visualization, Standardization, Digitization, and Intelligence of Electrolyte and Electrolyte‐Electrode Interface

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(25)

Published: April 22, 2024

Abstract Electrolytes have recently regained significant attention in rechargeable batteries due to the discovery that electrolyte microstructures play a determinant role battery performance. By adjusting compositions of electrolytes cater various functionalities, such as high‐voltage, fast‐charging, wide‐temperature operation, and non‐flammable features, diverse range can be developed adapt different environmental working conditions. Nevertheless, elucidating understanding associated electrode interfacial behaviors remain challenging. These challenges arise from interdisciplinary nature research, encompassing subjects solution chemistry, interface electrochemistry, organic chemistry. This topic holds particular significance because chemistry solution‐solid are ubiquitous daily lives, yet their unclear inherent complexity, dynamic nature, rapid variability. In this context, electrolyte‐electrode research used an illustrative example summarize progress six key perspectives graphic, quantitation, visualization, standardization, digitization, intelligence. It is aimed provide multi‐faceted on interface. comprehensive approach enables effective design enhances accuracy predicting performance, servicing development

Language: Английский

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Enhanced Electron Delocalization within Coherent Nano‐Heterocrystal Ensembles for Optimizing Polysulfide Conversion in High‐Energy‐Density Li‐S Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(13)

Published: Dec. 25, 2023

Abstract Commercialization of high energy density Lithium‐Sulfur (Li‐S) batteries is impeded by challenges such as polysulfide shuttling, sluggish reaction kinetics, and limited Li + transport. Herein, a jigsaw‐inspired catalyst design strategy that involves in situ assembly coherent nano‐heterocrystal ensembles (CNEs) to stabilize high‐activity crystal facets, enhance electron delocalization, reduce associated barriers proposed. On the surface, stabilized facets induce aggregation. Simultaneously, surrounded surface with enhanced activity promote 2 S deposition diffusion, synergistically facilitating continuous efficient sulfur redox. Experimental DFT computations results reveal dual‐component hetero‐facet alters coordination Nb atoms, enabling redistribution 3D orbital electrons at center promoting d‐p hybridization sulfur. The CNE, based on level gradient lattice matching, endows maximum transfer catalysts establishes smooth pathways for ion diffusion. Encouragingly, NbN‐NbC‐based pouch battery delivers Weight 357 Wh kg −1 , thereby demonstrating practical application value CNEs. This work unveils novel paradigm designing high‐performance catalysts, which has potential shape future research electrocatalysts storage applications.

Language: Английский

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Development of Synergistically Efficient Ni–Co Pair Catalytic Sites for Enhanced Polysulfide Conversion in Lithium–Sulfur Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(37)

Published: March 29, 2024

Abstract The performance of Lithium–sulfur (Li–S) batteries is constrained by the migration lithium polysulfide (LiPS), slow conversion LiPS, and significant reaction barrier encountered during precipitation/dissolution Li 2 S throughout discharge/charge cycle. In this contribution, study presents Ni–Co dual‐atom catalytic sites on hollow nitrogen‐doped carbon (NiCoNC). Theoretical calculations experimental data reveal that catalysts (DACs) accelerate kinetic LiPSs facilitate formation/decomposition discharging charging, which minimizes LiPS migration. Consequently, utilization S/NiCoNC cathodes manifests a substantial initial capacity 1348.5 mAh g −1 at 0.1 C, exceptional cycling stability with an average degradation rate 0.028% per cycle over 900 cycles 0.5 noteworthy capability 626 C. Electrodes higher sulfur loading 4.5 mg cm −2 low electrolyte/sulfur ratio 8 µL exhibit specific capacities up to 1236 as well retention 494.2 after 200 0.2 This effectively showcases potential DACs for cathodes, thereby enhancing overall Li–S batteries.

Language: Английский

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Recent advances and strategies of metal phosphides for accelerating polysulfide redox and regulating Li plating

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 510, P. 215836 - 215836

Published: April 12, 2024

Language: Английский

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Ultrasmall CoFe Bimetallic Alloy Anchored on Fluoride‐Free MXene by One‐Pot Etching Strategy for the Barrier‐Adsorption‐Catalyst Functions of Polysulfides in Lithium‐Sulfur Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(23)

Published: Feb. 7, 2024

Abstract The rational construction of electrocatalysts has sparked a growing interest in accelerating redox kinetics polysulfide and effectively restricting the “shuttle effect” Li‐S batteries. In this work, novel MXene‐supported ultrasmall Co 3 Fe 7 bimetallic alloy hybrids are fabricated via one‐pot molten salt etching strategy. Ti AlC 2 precursor can be directly converted to ‐MXene using environmentally friendly approach, eliminating need for acid/alkaline treatments complex procedures. Meanwhile, particles situ formed tightly anchored on MXene substrate. By simple coating, modified separator functions as barrier inhibit shuttle effect. Furthermore, electrochemical tests theoretical calculations demonstrate that exhibits exceptional adsorption capacity remarkable catalytic ability toward polysulfides, owing synergistic effect alloy. Consequently, cells assembled with achieve high capacity, excellent rate performance, superior cycle stability. This study provides comprehensive insight into design alloys efficient LiPSs high‐performance long‐life

Language: Английский

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