Size Effect and Interfacial Synergy Enhancement of 2D Ultrathin Co_xZn_1−x‐MOF/rGO for Boosting Lithium–Sulfur Battery Performance

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 3, 2025

Abstract Advanced cathode materials are developed to tackle the challenges of polysulfide shuttle effect and slow sulfur redox kinetics in Li–S batteries. A particularly effective strategy is creation nanostructured sulfur‐host, which boast high levels conductivity catalytic activity. Here, a series ultrathin cobalt–zinc bimetallic MOFs with varying ratios synthesized on rGO via one‐pot hydrothermal process. Furthermore, graphene's specific surface area enhances electrical structural integrity, thereby promoting growth 2D synergistically optimizing contact conversion kinetics. The Co x Zn 1‐x ‐MOF/rGO has disordered structure, resulting from fine‐tuned ratio cobalt zinc centers, generates active sites modulates electronic properties, enhancing LiPSs adsorption catalysis serve as hosts. Among composites, 0.75 0.25 demonstrated exceptional activity, capacity 649.69 mA h g −1 after 250th cycle an E/S 12.56 µL mg at 0.2 C. This work deepens insights into controlled design defective MOFs, modulating their structure‐activity correlations, expected facilitate integration carbonaceous advancing development

Language: Английский

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Hybrid double carbon layer with Co, Ni bimetal for high-performance lithium-sulfur batteries

Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: 979, P. 118923 - 118923

Published: Jan. 5, 2025

Language: Английский

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Molecular framework engineering of sulfur-containing polymers for enhanced ion transport efficiency in Li-S battery

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 636, P. 236579 - 236579

Published: Feb. 21, 2025

Language: Английский

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Synergistic vanadium carbide/oxide heterostructures within layered carbon for enhanced lithium–sulfur battery performance

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 693, P. 137646 - 137646

Published: April 17, 2025

Language: Английский

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Optimizing Adsorption‐Catalysis Synergy to Accelerate Sulfur Conversion Kinetics in Room‐Temperature Na‐S Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Abstract Room‐temperature sodium‐sulfur (RT Na‐S) batteries are expected to become the next‐generation energy storage system due their ultrahigh theoretically density of 1274 Wh kg −1 , abundant sulfur resource, and low cost. However, practical application is hindered by challenges severe shuttle effect sluggish S conversion kinetics. In this study, a series nano‐sized nickel‐based chalcogenides designed fabricated as electrocatalysts for cathode. The p orbitals originated from different anions show great on partial‐filled d orbital metal Ni site, which further regulates electronic states catalytic site. Theoretical experimental results confirm excellent electrocatalytic performance NiSe electrocatalyst with reaction barriers, moderate adsorption capability, strong ability, consistent Sabatier's principle. optimized catalyst presents high reversible capacity 720.4 mAh g durability over 200 cycles at 0.2 A retained 401.4 after 1000 2 in RT Na‐S batteries. This work balancing toward polysulfides via modulation d/p active sites.

Language: Английский

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Micro-Nano Conductive Network Structured Aramid Paper-Based Self-Supporting Cathode Enhances Cycling Stability in Lithium–Sulfur Battery

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Lithium–sulfur batteries (LSBs) continue to encounter significant challenges in practical applications, primarily attributed the low electrical conductivity of cathode active material sulfur, volume expansion during cycling and uncontrolled shuttle effect lithium polysulfides (LiPSs). In this work, flexible meta-aramid fibrids (AFs) were innovatively introduced, polydopamine (PDA) was employed effectively adhere highly conductive multiwalled carbon nanotubes (MWCNTs) AFs surface, thereby forming nanoscale pathways. A wet-laid process analogous aramid paper-making utilized enhance interfacial bonding between rigid fibers (CFs), resulting a self-supporting paper-based with uniform, dense three-dimensional micronano-scale network stable structure. The porous structure alleviates sulfur's expansion. polar PDA coating layer offers numerous chemical adsorption sites, which chemically anchor LiPSs more suppresses effect. research results demonstrate that AF@PDA-MWCNT/CF/S delivers an impressive initial discharge specific capacity 1140 mAh g–1 at sulfur loading 2.3 mg cm–2 current density 0.2 C. After 400 cycles higher 1 C, single-cycle fade rate is as 0.005%. Even high 3.1 cm–2, still exhibits 890 g–1. composite developed study application potential approach for constructing self-supporting, materials.

Language: Английский

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Electrospun Multiscale Structured Nanofibers for Lithium‐Based Batteries

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

Published: Nov. 5, 2024

Abstract Electrospun is a unique technique for the fabrication of multiscale structured nanofibers (MSNFs), which can be used as functional units improving performance lithium‐based batteries. This review systematically examines how MSNFs, including core–shell, hollow porous, multichannel, wire‐in‐tube, tube‐in‐tube, and hierarchical nanofibers, effectively improve battery components in The application aforementioned MSNFs their chemical modification contributes to development batteries with high energy density enhanced safety when electrodes, separators, electrolytes. Specifically, are derive electrodes electrolytes that electron/ion transfer rates, increase utilization ratio active materials, suppress dendrite growth, mitigate volume expansion, enabling fast stable electrochemical reactions at electrodes. Additionally, MSNFs‐derived feature more ion transport channels, exceptional mechanical properties, capability inhibit thermal runaway, also discussed. Finally, challenges prospective pathways electrospun technology reviewed.

Language: Английский

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Pre-carbonizing nickel-metal organic frameworks for enabling lithium–sulfur reactions

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(79), P. 11108 - 11111

Published: Jan. 1, 2024

The pre-carbonization treatment on Ni-MOF increases electron conductivity without structural collapse. Therefore, Ni-carbon not only preserves the polysulfide confinement ability of but also propels direct Li 2 S nucleation/decomposition.

Language: Английский

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Bimetallic NiCo@C with a Hollow Sea Urchin Structure Enables Li–S Batteries to Hasten the Reaction Kinetics and Effectively Inhibit the Shuttling of Polysulfides

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(42), P. 19835 - 19846

Published: Oct. 8, 2024

The "shuttle effect" and several issues related to it are seen as "obstacles" the study development of lithium-sulfur batteries (LSBs). This work aims at finding how fully expose bimetallic sites quicken battery reaction kinetics. Here, a NiCo-MOF its derivative NiCo@C with hollow sea urchin structure produced. obtained possesses micromesoporous disclosed active because distinctive structure. experimental findings demonstrate that exposed take on chemical adsorbents collaborate micromesopores physical constraints effectively suppress effect". Furthermore, enables highly conductive grid, which provides channels facilitate movement solvated Li

Language: Английский

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