Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

ACS Nano, Год журнала: 2022, Номер 16(10), С. 15734 - 15759

Опубликована: Окт. 12, 2022

Because of their high energy density, low cost, and environmental friendliness, lithium–sulfur (Li–S) batteries are one the potential candidates for next-generation energy-storage devices. However, they have been troubled by sluggish reaction kinetics insoluble Li2S product capacity degradation because severe shuttle effect polysulfides. These problems overcome introducing transition metal compounds (TMCs) as catalysts into interlayer modified separator or sulfur host. This review first introduces mechanism redox reactions. The methods studying TMC in Li–S provided. Then, recent advances TMCs (such oxides, sulfides, selenides, nitrides, phosphides, carbides, borides, heterostructures) some helpful design modulation strategies highlighted summarized. At last, future opportunities toward presented.

Язык: Английский

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Heterostructures Regulating Lithium Polysulfides for Advanced Lithium‐Sulfur Batteries

Advanced Materials, Год журнала: 2023, Номер 35(47)

Опубликована: Май 31, 2023

Sluggish reaction kinetics and severe shuttling effect of lithium polysulfides seriously hinder the development lithium-sulfur batteries. Heterostructures, due to unique properties, have congenital advantages that are difficult be achieved by single-component materials in regulating efficient catalysis strong adsorption solve problems poor serious In this review, principles heterostructures expediting conversion anchoring detailedly analyzed, application as sulfur host, interlayer, separator modifier improve performance batteries is systematically reviewed. Finally, need solved future study prospected. This review will provide a valuable reference for advanced

Язык: Английский

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Recent Progress for Concurrent Realization of Shuttle‐Inhibition and Dendrite‐Free Lithium–Sulfur Batteries

Advanced Materials, Год журнала: 2023, Номер 35(32)

Опубликована: Март 24, 2023

Lithium-sulfur (Li-S) batteries have become one of the most promising new-generation energy storage systems owing to their ultrahigh density (2600 Wh kg-1 ), cost-effectiveness, and environmental friendliness. Nevertheless, practical applications are seriously impeded by shuttle effect soluble lithium polysulfides (LiPSs), uncontrolled dendrite growth metallic Li, which result in rapid capacity fading battery safety problems. A systematic comprehensive review cooperative combination tackling fundamental problems terms cathode anode synchronously is still lacking. Herein, for first time, strategies inhibiting behavior dendrite-free Li-S simultaneously summarized classified into three parts, including "two-in-one" S-cathode Li-anode host materials toward full cell, "two birds with stone" modified functional separators, tailoring electrolyte stabilizing sulfur electrodes. This also emphasizes chemistry mechanism catalyst principles improving electrochemical performance; advanced characterization technologies monitor real-time LiPS evolution discussed detail. The problems, perspectives, challenges respect issues as well application proposed.

Язык: Английский

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Dual‐Functional V₂C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

Advanced Materials, Год журнала: 2023, Номер 35(26)

Опубликована: Март 19, 2023

Abstract Lithium–sulfur (Li–S) batteries are considered as one of the most promising candidates to achieve an energy density 500 Wh kg⁻ 1 . However, challenges shuttle effect, sluggish sulfur conversion kinetics, and lithium‐dendrite growth severely obstruct their practical implementation. Herein, multiscale V 2 C MXene (VC) with a spherical confinement structure is designed high‐efficiency bifunctional promotor for evolution lithium species in Li–S batteries. Combining synchrotron X‐ray 3D nano‐computed tomography (X‐ray nano‐CT), small‐angle neutron scattering (SANS), first‐principle calculations, it revealed that activity VC can be maximized by tuning scale, as‐attained functions conducted follows: (i) acts efficient polysulfide (LiPS) scavenger due large number active sites; (ii) exhibits significantly improved electrocatalytic function Li S nucleation decomposition reaction kinetics owing scale effect; (iii) regulate dynamic behavior Li‐ions thus stabilize plating/stripping effectively on account unique ion‐sieving effect.

Язык: Английский

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Engineering Cooperative Catalysis in Li–S Batteries

Advanced Energy Materials, Год журнала: 2023, Номер 13(26)

Опубликована: Июнь 6, 2023

Abstract Lithium–sulfur (Li–S) batteries are regarded to be one of the most promising next‐generation owing merits high theoretical capacity and low cost. However, aprotic S electrochemistry is hampered by shuttling effect sluggish conversion soluble lithium polysulfides (LiPSs). Various electrocatalysts have been designed optimize kinetics LiPSs. Heteroatom doping or polar catalyst incorporation plays an important role remedy these shortcomings. Here, cooperative catalytic effects engendered heteroatom codoping engineering, catalyst/heteroatom composite strategy, integrating polar‐metal‐based material design summarized. First, principles on conductive interface described in detail. Moreover, a systematic investigation electrocatalytic characterization techniques that establish bridge between solid–liquid macroscopic electrochemical performance highlighted, providing more scientific guidance for design. In conclusion, stemming from current achievements, future directions targeting high‐energy‐density Li–S commercialization proposed.

Язык: Английский

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VN quantum dots anchored N-doped carbon nanosheets as bifunctional interlayer for high-performance lithium-metal and lithium-sulfur batteries

Chemical Engineering Journal, Год журнала: 2023, Номер 459, С. 141526 - 141526

Опубликована: Янв. 20, 2023

Язык: Английский

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Rechargeable Metal-Sulfur Batteries: Key Materials to Mechanisms

Chemical Reviews, Год журнала: 2024, Номер 124(8), С. 4935 - 5118

Опубликована: Апрель 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.

Язык: Английский

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Co/Mon Invigorated Bilateral Kinetics Modulation for Advanced Lithium–Sulfur Batteries

Advanced Materials, Год журнала: 2023, Номер 36(13)

Опубликована: Дек. 22, 2023

Abstract Sluggish sulfur redox kinetics and Li‐dendrite growth are the main bottlenecks for lithium–sulfur (Li–S) batteries. Separator modification serves as a dual‐purpose approach to address both of these challenges. In this study, Co/MoN composite is rationally designed applied modifier modulate electrochemical on sides cathode lithium anode. Benefiting from its adsorption‐catalysis function, decorated separators (Co/MoN@PP) not only effectively inhibit polysulfides (LiPSs) shuttle accelerate their conversion but also boost Li + flux, realizing uniform plating/stripping. The accelerated LiPSs excellent reversibility triggered by modified evidenced performance, in‐situ Raman detection theoretical calculations. batteries with Co/MoN@PP achieve high initial discharge capacity 1570 mAh g −1 at 0.2 C low decay rate 0.39%, transportation 1 mA cm −2 over 800 h. Moreover, areal 4.62 achieved under mass loadings 4.92 mg . This study provides feasible strategy rational utilization synergistic effect multifunctional microdomains solve problems anode S toward long‐cycling Li–S

Язык: Английский

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Effect of Heterostructure‐Modified Separator in Lithium–Sulfur Batteries

Small, Год журнала: 2023, Номер 19(42)

Опубликована: Июнь 9, 2023

Lithium-sulfur (Li-S) batteries with high energy density and low cost are the most promising competitor in next generation of new reserve devices. However, there still many problems that hinder its commercialization, mainly including shuttle soluble polysulfides, slow reaction kinetics, growth Li dendrites. In order to solve above issues, various explorations have been carried out for configurations, such as electrodes, separators, electrolytes. Among them, separator contact both anode cathode is a particularly special position. Reasonable design-modified material can key problems. Heterostructure engineering modification method combine characteristics different materials generate synergistic effect at heterogeneous interface conducive Li-S electrochemical behavior. This review not only elaborates role heterostructure-modified separators dealing problems, but also analyzes improvement wettability thermal stability by heterostructure materials, systematically clarifies advantages, summarizes some related progress recent years. Finally, future development direction heterostructure-based given.

Язык: Английский

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Delocalized Isoelectronic Heterostructured FeCoO_xS_y Catalysts with Tunable Electron Density for Accelerated Sulfur Redox Kinetics in Li‐S batteries

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(47)

Опубликована: Сен. 6, 2023

High interconversion energy barriers, depressive reaction kinetics of sulfur species, and sluggish Li+ transport inhibit the wide development high-energy-density lithium (Li-S) batteries. Herein, differing from random mixture selected catalysts, composite catalyst with outer delocalized isoelectronic heterostructure (DIHC) is proposed optimized, enhancing catalytic efficiency for decreasing related barriers. As a proof-of-content, FeCoOx Sy composites different degrees sulfurization are fabricated by regulating atoms ratio between O S. The relationship principal mechanism in DIHCs deeply understood electrochemical experiments to situ/operando spectral spectroscopies i.e., Raman, XRD UV/Vis. Consequently, polysulfide conversion Li2 S precipitation/dissolution strongly demonstrate volcano-like various DIHCs. Furthermore, -decorated cell delivers high performance (1413 mAh g-1 at 0.1 A ). Under low electrolyte/sulfur ratio, loading stabilizes areal capacity 6.67 cm-2 0.2 . Impressively, even resting about 17 days possible shuttling, high-mass-loading same capacity, showing practical application improving reaching performance.

Язык: Английский

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