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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Toward Low‐Temperature Zinc‐Ion Batteries: Strategy, Progress, and Prospect in Vanadium‐Based Cathodes

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(8)

Published: Dec. 28, 2023

Abstract Low‐temperature vanadium‐based zinc ion batteries (LT‐VZIBs) have attracted much attention in recent years due to their excellent theoretical specific capacities, low cost, and electrochemical structural stability. However, working temperature surrounding often results retarded transport not only the frozen aqueous electrolyte, but also at/across cathode/electrolyte interface inside cathode interior, significantly limiting performance of LT‐VZIBs for practical applications. In this review, a variety strategies solve these issues, mainly including interface/bulk structure engineering electrolyte optimizations, are categorially discussed systematically summarized from design principles in‐depth characterizations mechanisms. end, several issues about future research directions advancements characterization tools prospected, aiming facilitate scientific commercial development LT‐VZIBs.

Language: Английский

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From Charge to Spin: An In‐Depth Exploration of Electron Transfer in Energy Electrocatalysis

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(37)

Published: March 14, 2024

Abstract Catalytic materials play crucial roles in various energy‐related processes, ranging from large‐scale chemical production to advancements renewable energy technologies. Despite a century of dedicated research, major enduring challenges associated with enhancing catalyst efficiency and durability, particularly green electrochemical reactions, remain. Focusing only on either the crystal structure or electronic is deemed insufficient break linear scaling relationship (LSR), which golden rule for design advanced catalysts. The discourse this review intricately outlines essence heterogeneous catalysis reactions by highlighting vital played electron properties. physical properties charge spin that govern efficiencies are analyzed. Emphasis placed pronounced influence external fields perturbing LSR, underscoring role plays advancing high‐performance design. culminates proffering insights into potential applications catalysis, concluding discussion extant inherent limitations.

Language: Английский

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Insight Into Intermediate Behaviors and Design Strategies of Platinum Group Metal‐Based Alkaline Hydrogen Oxidation Catalysts

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

Hydrogen oxidation reaction (HOR) can effectively convert the hydrogen energy through fuel cells, which plays an increasingly important role in renewable cycle. Nevertheless, when electrolyte pH changes from acid to base, even with platinum group metal (PGM) catalysts, HOR kinetics declines several orders of magnitude. More critically, pivotal intermediates and interfacial environment during intermediate behaviors on alkaline remains controversial. Therefore, exploring exceptional PGM-based electrocatalysts identifying mechanism are indispensable for promoting commercial development cells. Consequently, fundamental understanding is first introduced, emphases adsorption/desorption process distinct reactive structure catalytic process. Subsequently, guidance mechanism, latest advances rational design advanced (Pt, Pd, Ir, Ru, Rh-based) catalysts discussed, focusing correlation between electrocatalytic performance. Finally, given that challenges standing HOR, prospect thorough investigation towards emphatically proposed.

Language: Английский

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Defect engineering enables an advanced separator modification for high-performance lithium-sulfur batteries

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 487, P. 150574 - 150574

Published: March 23, 2024

Language: Английский

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Heteroatoms Modulate the Copper Single Atom Catalytic Host Materials for Promoting the Redox Reaction in Aqueous Zinc‐Selenium Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 18, 2024

Abstract Aqueous zinc‐selenium (Zn‐Se) batteries have garnered much attention due to their inherent safety and high specific capacity. Unfortunately, the problem of sluggish redox reaction represents a significant obstacle development aqueous Zn‐Se batteries. Here, nitrogen‐phosphorus asymmetrically coordinated copper single atom catalytic host material (CuN 3 P 1 @C) is synthesized for an battery. The CuN @C exhibits rich porous structure, high‐loading Cu atoms, unique asymmetric coordination environment, which significantly reduces energy barrier between Se Zn, enhancing electrochemical performance Consequently, Se/CuN cathode achieves capacity 756 mAh g −1 at 0.2 A cycling stability 4 000 cycles 5.0 (capacity decay 0.0044% per cycle). Meanwhile, conversion mechanism battery systematically explored via systematical characteristics density functional theory calculations. This work opens up novel approach boosting by modulating atom‐based materials heteroatoms.

Language: Английский

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Heterogenization‐Activated Zinc Telluride via Rectifying Interfacial Contact to Afford Synergistic Confinement‐Adsorption‐Catalysis for High‐Performance Lithium−Sulfur Batteries

Small, Journal Year: 2024, Volume and Issue: 20(23)

Published: Jan. 10, 2024

Abstract The notorious shuttle effect and sluggish conversion kinetics of intermediate polysulfides (Li 2 S 4 , Li 6 8 ) are severely hindered the large‐scale development Lithium–sulfur (Li–S) batteries. Rectifying interface has been a solution to regulate electron distribution catalysts via interfacial charge exchange. Herein, ZnTe−ZnO heterojunction encapsulated in nitrogen‐doped hierarchical porous carbon (ZnTe‐O@NC) derived from metal–organic framework is fabricated. Theoretical calculations experiments prove that built‐in electric field constructed at rectifying contact, thus promoting transfer as well enhancing adsorption toward polysulfides, thereby stimulating catalytic activity ZnTe. Meanwhile, acts confinement substrate also enables fast electrons/ions transport, combining with realize synergistic confinement‐adsorption‐catalysis polysulfides. As result, Li–S batteries S/ZnTe‐O@NC electrodes exhibit an impressive rate capability (639.7 mAh g −1 3 C) cycling performance (70% capacity retention 1 C over 500 cycles). Even high sulfur loading, it still delivers superior electrochemical performance. This work provides novel perspective on designing highly materials achieve for high‐performance Li−S

Language: Английский

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Electron delocalization-enhanced sulfur reduction kinetics on an MXene-derived heterostructured electrocatalyst

Nano Research, Journal Year: 2024, Volume and Issue: 17(8), P. 7153 - 7162

Published: May 15, 2024

Language: Английский

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Boosting reaction kinetics of polycrystalline phase Fe₇S₈/FeS₂ heterostructures encapsulated in hollow carbon nanofibers for superior fast sodium storage

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(19), P. 11266 - 11276

Published: Jan. 1, 2024

An Fe 7 S 8 /FeS 2 heterojunction grown in hollow fibers was designed. This can regulate the valence state of iron sulfide, further change its crystal phase, increase diffusion coefficient, and contribute to high-rate SIBs.

Language: Английский

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Pristine MOF Materials for Separator Application in Lithium–Sulfur Battery

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

Published: June 18, 2024

Abstract Lithium–sulfur (Li–S) batteries have attracted significant attention in the realm of electronic energy storage and conversion owing to their remarkable theoretical density cost‐effectiveness. However, Li–S continue face challenges, primarily severe polysulfides shuttle effect sluggish sulfur redox kinetics, which are inherent obstacles practical application. Metal‐organic frameworks (MOFs), known for porous structure, high adsorption capacity, structural flexibility, easy synthesis, emerged as ideal materials separator modification. Efficient interception/conversion ability rapid lithium‐ion conduction enabled by MOFs modified layers demonstrated batteries. In this perspective, objective is present an overview recent advancements utilizing pristine MOF modification separators The mechanisms behind enhanced electrochemical performance resulting from each design strategy explained. viewpoints crucial challenges requiring resolution also concluded Moreover, some promising concepts based on proposed enhance investigate adsorption/conversion mechanisms. These efforts expected contribute future advancement advanced

Language: Английский

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