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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Construction of Co₃O₄/ZnO Heterojunctions in Hollow N‐Doped Carbon Nanocages as Microreactors for Lithium–Sulfur Full Batteries

Advanced Science, Год журнала: 2023, Номер 10(19)

Опубликована: Апрель 20, 2023

Lithium-sulfur (Li-S) batteries are promising alternatives of conventional Li-ion attributed to their remarkable energy densities and high sustainability. However, the practical applications Li-S hindered by shuttling effect lithium polysulfides (LiPSs) on cathode Li dendrite formation anode, which together leads inferior rate capability cycling stability. Here, an advanced N-doped carbon microreactors embedded with abundant Co

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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General Scalable Synthesis of Mesoporous Metal Oxide Nanosheets with High Crystallinity for Ultralong‐Life Li–S Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(25)

Опубликована: Янв. 15, 2024

Abstract Mesoporous metal oxide nanosheets (MMONs) are demonstrated great promise for various catalytic applications such as water splitting, CO 2 reduction, and metal–sulfur batteries. However, limited by the conventional high‐temperature synthetic routes, prepared MMONs expose only a small portion of effective sites, which greatly restricts their electrocatalytic activity. Herein, facile general glycine‐assisted strategy is developed to synthesize series with high crystallinity remarkable porosity. Impressively, single‐phase perovskite type containing up ten cations can be synthesized easily using this method without any further purification step. As proof concept, Li–S cell mesoporous LaFe 0.4 Co 0.2 Ni Cu O 3 catalyst achieves superior ultralong cycling life over 1500 cycles at C 0.041% capacity decay per cycle areal reaching 6.0 mAh cm −2 low electrolyte/sulfur ratio 5.9 µL mg −1 . The improved performance attributed abundant active sites synergistic contribution multicomponent. This work paves new avenue synthesis advanced will inspire practical in different fields.

Язык: Английский

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3d‐Orbital High‐Spin Configuration Driven From Electronic Modulation of Fe₃O₄/FeP Heterostructures Empowering Efficient Electrocatalyst for Lithium−Sulfur Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(49)

Опубликована: Авг. 29, 2024

Abstract The intricate lithium polysulfides (LiPSs) shuttle and uncontrollable dendrite growth critically hinder the commercialization of lithium−sulfur (Li−S) batteries. rational orderly assignment multi‐electron induced flow is critical link in sulfer redox reaction. Herein, yolk‐shell Fe 3 O 4 /FeP@C heterostructure nanoreactors are fabricated to modulate electronic structure, including spin‐related charge behavior orbital orientation control, which can demonstrate interaction between catalytic activity spin‐state conformation. spin splitting induces electron transition from low‐spin high‐spin, where non‐degenerate orbitals contribute energy level up‐shift, guiding migration FeP , activating more states d orbitals. Spin polarization guides sulfur closed‐loop conversion, confirmed by DFT simulations situ Raman. Hence, electrochemical performances remarkable at ultra‐high current density loading. Even an initial specific capacity 928.5 mAh g −1 a Li−S pouch cell reveals practical prospect /FeP@C/PP separator. Li//Li symmetric cycles steadily for 4000 h, confirming interlayer simultaneously promotes evolution kinetics sieves ions. This work deciphers principles spin‐orbit coupling, achieving topological modulation “charge−spin−orbit” toward electrocatalysts.

Язык: Английский

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MOF‐derived Carbon‐Based Materials for Energy‐Related Applications

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 10, 2025

Abstract New carbon‐based materials (CMs) are recommended as attractively active due to their diverse nanostructures and unique electron transport pathways, demonstrating great potential for highly efficient energy storage applications, electrocatalysis, beyond. Among these newly reported CMs, metal–organic framework (MOF)‐derived CMs have achieved impressive development momentum based on high specific surface areas, tunable porosity, flexible structural‐functional integration. However, obstacles regarding the integrity of porous structures, complexity preparation processes, precise control components hinder regulation interface engineering in CMs. In this context, review systematically summarizes latest advances tailored types, processing strategies, energy‐related applications MOF‐derived focuses structure‐activity relationship metal‐free carbon, metal‐doped metallide‐doped carbon. Particularly, intrinsic correlation evolutionary behavior between synergistic interaction micro/nanostructures species with electrochemical performances emphasized. Finally, insights perspectives relevant research presented, future prospects challenges discussed, providing valuable guidance boost high‐performance electrodes a broader range application fields.

Язык: Английский

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RuO_x Quantum Dots Loaded on Graphdiyne for High‐Performance Lithium–Sulfur Batteries

Advanced Materials, Год журнала: 2023, Номер 36(9)

Опубликована: Ноя. 4, 2023

Abstract Here, a strategy to strengthen d–p orbital hybridization by fabricating π backbonding in the catalyst for efficient lithium polysulfides (LiPSs) conversion is reported. A special interface structure of RuO x quantum dots (QDs) anchored on graphdiyne (GDY) nanoboxes (RuO QDs/GDY) prepared enable strong Ru‐to‐alkyne backdonation, which effectively regulates d‐electron structures Ru centers promote between and LiPSs significantly boosts catalytic performance QDs/GDY. The affinity with Li ions fast Li‐ion diffusion QDs/GDY also ultrastable metal anodes. Thus, S@RuO cathodes exhibit excellent cycling under harsh conditions, Li@RuO anodes show an ultralong life over 8800 h without dendrite growth. Lithium‐sulfur (Li–S) full cells can deliver impressive areal capacity 17.8 mA cm −2 good stability practical conditions low negative‐to‐positive electrode (N/P) ratio (N/P = 1.4), lean electrolyte (E/S 3 µL mg −1 ), high S mass loading (15.4 ).

Язык: Английский

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Nanofiber‐Interlocked V₂CT_x Hosts Enriched with 3D Lithiophilic and Sulfophilic Sites for Long‐Life and High‐Rate Lithium–Sulfur Batteries

Advanced Functional Materials, Год журнала: 2023, Номер 34(7)

Опубликована: Окт. 30, 2023

Abstract Lithium–sulfur batteries (LSBs) currently face challenges including lithium polysulfide shuttling, sluggish sulfur redox kinetics, severe dendrite growth, and volume change. Herein, an advanced dual‐functional host is designed by embedding 3D N‐doped carbon fibers with abundant 2D V 2 CT x nanosheets (N/CF@V ). The act as “thread” to connect the form a unique open macroporous structure. This structure effectively prevents restacking of exposes their lithiophilic sulfurophilic sites. Consequently, N/CF@V suppresses shuttling LiPSs improves cathodic kinetics. Furthermore, 3D‐ordered porous skeleton integrated lithophilic sites enables uniform Li deposition homogeneous Li‐ion flux, thereby inhibiting growth mitigating expansion. as‐assembled LSBs exhibit excellent rate capability (640 mAh g −1 at 15 C) outstanding cycling stability (0.019% capacity decay per cycle throughout 1200 cycles 1 C). Moreover, pouch cell assembled demonstrates high energy density 350 Wh kg good stability. research presents promising approach address both cathode anode comprehensively in working LSBs.

Язык: Английский

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Surface Crystal Modification of Na₃V₂(PO₄)₃ to Cast Intermediate Na₂V₂(PO₄)₃ Phase toward High‐Rate Sodium Storage

Advanced Science, Год журнала: 2023, Номер 11(3)

Опубликована: Ноя. 23, 2023

The two-phase reaction of Na

Язык: Английский

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Multifunctional Film Assembled from N-Doped Carbon Nanofiber with Co–N4–O Single Atoms for Highly Efficient Electromagnetic Energy Attenuation

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Июль 9, 2024

Single-atom materials have demonstrated attractive physicochemical characteristics. However, understanding the relationships between coordination environment of single atoms and their properties at atomic level remains a considerable challenge. Herein, facile water-assisted carbonization approach is developed to fabricate well-defined asymmetrically coordinated Co-N

Язык: Английский

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