Engineering Strategies for Suppressing the Shuttle Effect in Lithium–Sulfur Batteries

Nano-Micro Letters, Год журнала: 2023, Номер 16(1)

Опубликована: Ноя. 10, 2023

Lithium-sulfur (Li-S) batteries are supposed to be one of the most potential next-generation owing their high theoretical capacity and low cost. Nevertheless, shuttle effect firm multi-step two-electron reaction between sulfur lithium in liquid electrolyte makes much smaller than value. Many methods were proposed for inhibiting polysulfide, improving corresponding redox kinetics enhancing integral performance Li-S batteries. Here, we will comprehensively systematically summarize strategies from all components First, electrochemical principles/mechanism origin described detail. Moreover, efficient strategies, including boosting conversion rate sulfur, confining or polysulfides (LPS) within cathode host, LPS shield layer, preventing contacting anode, discussed suppress effect. Then, recent advances inhibition cathode, electrolyte, separator, anode with aforementioned have been summarized direct further design materials Finally, present prospects development directions

Язык: Английский

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Boosting Lean Electrolyte Lithium–Sulfur Battery Performance with Transition Metals: A Comprehensive Review

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Июнь 29, 2023

Lithium-sulfur (Li-S) batteries have received widespread attention, and lean electrolyte Li-S attracted additional interest because of their higher energy densities. This review systematically analyzes the effect electrolyte-to-sulfur (E/S) ratios on battery density challenges for sulfur reduction reactions (SRR) under conditions. Accordingly, we use various polar transition metal hosts as corresponding solutions to facilitate SRR kinetics at low E/S (< 10 µL mg-1), strengths limitations different compounds are presented discussed from a fundamental perspective. Subsequently, three promising strategies that act anchors catalysts proposed boost performance. Finally, an outlook is provided guide future research high batteries.

Язык: 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, Год журнала: 2023, Номер 36(13)

Опубликована: Дек. 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.

Язык: Английский

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Boosting Charge Transport and Catalytic Performance in MoS₂ by Zn²⁺ Intercalation Engineering for Lithium–Sulfur Batteries

ACS Nano, Год журнала: 2024, Номер 18(3), С. 2017 - 2029

Опубликована: Янв. 9, 2024

Transition metal dichalcogenides (TMDs) have been widely studied as catalysts for lithium–sulfur batteries due to their good catalytic properties. However, poor electronic conductivity leads slow sulfur reduction reactions. Herein, a simple Zn2+ intercalation strategy was proposed promote the phase transition from semiconducting 2H-phase metallic 1T-phase of MoS2. Furthermore, between layers can expand interlayer spacing MoS2 and serve charge transfer bridge longitudinal transport along c-axis electrons. DFT calculations further prove that Zn-MoS2 possesses better ability stronger adsorption capacity. At same time, exhibits excellent redox electrocatalytic performance conversion decomposition polysulfides. As expected, battery using Zn0.12MoS2-carbon nanofibers (CNFs) cathode has high specific capacity (1325 mAh g–1 at 0.1 C), rate (698 3 outstanding cycle (it remains 604 after 700 cycles with decay 0.045% per cycle). This study provides valuable insights improving batteries.

Язык: Английский

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

Advanced Science, Год журнала: 2024, Номер 11(31)

Опубликована: Июнь 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.

Язык: Английский

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Regulating Lithium Nucleation at the Electrolyte/Electrode Interface in Lithium Metal Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(24)

Опубликована: Янв. 23, 2024

Abstract Lithium (Li) metal has emerged as a viable alternative anode material to address the current energy density shortfalls in Li batteries. However, its integration into widespread implementation remains somewhat constrained due substandard reversibility issues and safety concerns arising from erratic deposition. To effectively tackle these obstacles, considerable endeavors have been exerted modulate morphology of Nevertheless, it is exceedingly challenging for nuclei that tend dendritic growth thermodynamically transform dense morphologies during their process. Therefore, crucial understand what influences formation process how improve state nuclei. Herein, nucleation mechanisms involving mass transport across solid electrolyte interface electrode interfacial reactions are elucidated. Inspired by understanding nucleation, corresponding design principles, including enhancing homogenizing transport, stabilizing film, regulating surface interaction/selection, summarized optimizing further inducing dendrite‐free In light competition among perspective on existing challenges opportunities promoting application batteries proposed.

Язык: Английский

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Rare Earth Single‐Atom Catalysis for High‐Performance Li−S Full Battery with Ultrahigh Capacity

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(31)

Опубликована: Май 18, 2024

Lithium-sulfur (Li-S) batteries have many advantages but still face problems such as retarded polysulfides redox kinetics and Li dendrite growth. Most reported single atom catalysts (SACs) for Li-S are based on d-band transition metals whose d orbital constitutes active valence band, which is inclined to occur catalyst passivation. SACs 4f inner of rare earth challenging their great difficulty be activated. In this work, we design synthesize the first metal Sm has electron-rich promote catalytic conversion uniform deposition Li. enhance catalysis by activated through an f-d-p hybridization. Using Sm-N

Язык: Английский

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Energizing Robust Sulfur/Lithium Electrochemistry via Nanoscale-Asymmetric-Size Synergism

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Янв. 28, 2025

Sluggish redox kinetics and dendrite growth perplex the fulfillment of efficient electrochemistry in lithium–sulfur (Li–S) batteries. The complicated sulfur phase transformation sulfur/lithium diversity necessitate an all-inclusive approach catalyst design. Herein, a compatible mediator with nanoscale-asymmetric-size configuration by integrating Co single atoms defective CoTe2–x (CoSA-CoTe2–x@NHCF) is elaborately developed for regulating synchronously. Substantial theoretical analyses reveal that exhibits higher catalytic activity long-chain polysulfide Li2S decomposition, while monodispersed sites are more effective boosting reduction to regulate deposition. Such cascade catalysis endows CoSA-CoTe2–x@NHCF all-around service "trapping-conversion-recuperation" species during whole reaction. Furthermore, it demonstrated situ transmission electron microscopy initially formed electronic-conductive ionic-conductive Li2Te provide sufficient lithiophilic homogeneous Li plating stripping markedly suppressed growth. Consequently, coupling interlayer Li@CoSA-CoTe2–x@NHCF anode, constructed Li–S full batteries deliver superior cycling stability rate performance, flexible pouch cell stable performance at 0.3 C. gained insights into synergistic effect asymmetric-size structures pave way integrated design advanced systems.

Язык: Английский

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Oxygen Bridges of CoTe₂/Co─O─NC Enhancing Adsorption‐Catalysis of Polysulfide for Stable Lithium–Sulfur Batteries

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Abstract Lithium–sulfur batteries are regarded as candidates for next‐generation energy storage systems, but their slow reaction kinetics and shuttle effect severely hinder practical applications. One of the key solutions is to design apply efficient, highly stable, long‐life catalysts. Herein, a nanostructured CoTe 2 /Co─O─NC electrocatalytic material developed achieve effective adsorption bidirectional catalytic conversions lithium polysulfides (LiPSs). Results show that oxygen bridges (Co─O─C) formed in not only effectively shift d‐band center cobalt near its Fermi level enhance LiPSs also strengthen built‐in electric fields /Co heterojunctions reduce barrier sulfur conversion. Deposition dissociation Li S significantly enhanced during charging/discharging processes. Durability active catalyst improved, rapid cross‐interfacial charge transfer achieved. The synthesized S/CoTe cathode exhibits an initial capacity 1498 mAh g −1 at 0.1 C, decay rate over 500 cycles 0.5 C 0.046%. Li─S pouch cells using density 368 Wh kg areal 7.7 cm −2 loading 6.7 mg , with electrolyte/sulfur ratio 4 µL .

Язык: Английский

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Coupling Bifunctional Scaffolds with Slow Photon Effect for Synergistically Enhanced Photoassisted Lithium–Sulfur Battery Properties

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Янв. 25, 2025

Photoassisted lithium-sulfur (Li-S) batteries offer a promising approach to enhance the catalytic transformation kinetics of polysulfide. However, development is greatly hindered by inadequate photo absorption and severe photoexcited carriers recombination. Herein, photonic crystal sulfide heterojunction structure designed as bifunctional electrode scaffold for photoassisted Li-S batteries. Inverse opal (IO) structures utilize slow photon effect that originates from their adjustable band gaps, giving them distinctive optical response characteristics. The incorporation SnS/ZnS within these IO frameworks further broadens light spectrum enhances charge transfer process. This efficient hybrid not only adsorption conversion polysulfides at cathode but also induces uniform Li nucleation anode. These contribute full output high reversible capability 1072 mAh g-1 maintain stable cycling 50 cycles. Additionally, specific capacity 698.8 still obtained even under sulfur loading up 4 mg cm-2. present strategy on battery properties can be extended rationally construct other energy storage devices.

Язык: Английский

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