3D Printing of Tungstate Anion Modulated 1T‐MoS₂ Composite Cathodes for High‐Performance Lithium–Sulfur Batteries

Advanced Energy Materials, Год журнала: 2024, Номер 14(39)

Опубликована: Июль 10, 2024

Abstract Lithium–sulfur (Li–S) batteries can offer high capacity and energy‐density, but face challenges like low conductivity, lithium polysulfides (LiPSs) shuttling, limited reaction kinetics. In this study, the electronic configuration of Mo 4d orbital in MoS 2 is modulated through a one‐step method involving tungstate anion (WO 4 2− ) modulation to form stable 1T‐MoS /carbon composite (1T‐W‐MoS /C). When WO introduced, it causes transfer electrons 2H‐MoS , resulting generation 1T phase. composite, nanosheets exhibit remarkable hydrophilicity, catalytic activity, facilitating LiPSs adsorption Li + transport. Meanwhile, create abundant adsorption/catalytic sites with defects on basal surface edges efficient catalysis conversion. Furthermore, 3D‐printed electrodes without utilization binders current collectors ensure mass loading promote ion diffusion electrolyte penetration. Theoretical experimental results confirm that 1T‐W‐MoS /C catalyze conversion, suppress enhance sulfur Therefore, /C/S cathode exhibits initial excellent rate capability, achieving an areal 7.37 mAh cm −2 8.89 mg .

Язык: Английский

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Insights into the aspect ratio effects of ordered mesoporous carbon on the electrochemical performance of sulfur cathode in lithium-sulfur batteries

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 665, С. 286 - 298

Опубликована: Март 20, 2024

Tailoring porous host materials, as an effective strategy for storing sulfur and restraining the shuttling of soluble polysulfides in electrolyte, is crucial design high-performance lithium-sulfur (Li-S) batteries. However, widely studied conductive hosts such mesoporous carbon, how aspect ratio affects confining ability to polysulfides, ion diffusion well performances Li-S batteries has been rarely studied. Herein, ordered carbon (OMC) chosen a proof-of-concept prototype host, its tuned from over ∼ 2 down below 1.2 by using silica hard templates with variable length/width scales. The correlation between OMCs electrochemical corresponding sulfur-carbon cathodes are systematically combined measurements microscopic characterizations. Moreover, evolution species at different discharge states scrutinized small-angle X-ray scattering. This study gives insight into effects on battery cathodes, providing guidelines designing materials high-energy cathodes.

Язык: Английский

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Interfacial redox modulation of polysulfides with ferrocene functionalized separator in Al–S batteries

Materials Today Chemistry, Год журнала: 2024, Номер 38, С. 102055 - 102055

Опубликована: Апрель 27, 2024

Язык: Английский

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Charge density redistribution mechanism in dual-functional electrodes for enhanced the sulfophilic and lithiophilic of Li-S cells

Chemical Engineering Journal, Год журнала: 2025, Номер 505, С. 159333 - 159333

Опубликована: Янв. 6, 2025

Язык: Английский

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Photo-motivated heterojunctions coupling built-in electric field stimulating sulfur redox kinetics for lithium-sulfur batteries

Chemical Engineering Journal, Год журнала: 2025, Номер 506, С. 160356 - 160356

Опубликована: Янв. 1, 2025

Язык: Английский

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Shortening the Reaction Pathway of Sulfur Redox Kinetics with 2,5-Dichloro-1,4-Benzoquinone to Minimize the Shuttle Effect in Lithium–Sulfur Batteries

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

The low active material utilization, sluggish sulfur redox kinetics, and formation of unstable interfacial layers remain critical challenges in lithium-sulfur (Li-S) batteries. To minimize these effects, 2, 5-dichloro-1,4-benzoquinone (DCBQ) was demonstrated this study as an electrolyte additive. Leveraging its unique symmetrical structure, DCBQ interacted with polysulfides during charge discharge cycles to form insoluble symmetric cyclic organic polysulfide intermediates. These intermediates served a cathode-electrolyte interphase (CEI) by attaching the cathode surface, which mitigated shuttle effect reducing accumulation Li2S suppressing dissolution. In presence DCBQ, pathway for Li2S6 transitioned from → Li2S4 Li2S2 shortened sequence Li2S3 Li2S, enhancing utilization streamlining processes. On anode side, LiCl intermediate compounds contributed organic-inorganic solid-electrolyte interface (SEI), protected lithium anode, improved Li+ diffusion coefficient (6.63 × 10-11 cm2 S-1), eventually enhanced battery's cycling stability. Consequently, Li-S battery that included additive exhibited nearly 100% Coulombic efficiency at rate 0.2 C. It showed initial discharge-specific capacity 992.24 mAh g-1 experienced low-capacity degradation just 0.45% per cycle over 120 cycles. results highlight effectiveness both performance stability battery.

Язык: Английский

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Stabilizing Ru Single Atoms on Asymmetric La/Co₃O₄ Supports with Strong Metal–Support Interaction for Efficient Acidic Water Oxidation

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 7403 - 7413

Опубликована: Апрель 20, 2025

Язык: Английский

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Dual‐Functional Electrodes for High‐performance Lithium–Sulfur Cells

Advanced Functional Materials, Год журнала: 2023, Номер 34(6)

Опубликована: Окт. 29, 2023

Abstract At present, the commercial application of Li─S cells is impeded by many challenging issues, especially shuttle effect dissolved lithium polysulfides (LiPSs) and severe dendritic growth. Applying a sole kind host material owing dual functions, including inhibiting LiPSs dissolution/shuttling andguiding Li plating/stripping, has recently become prospective solution. Currently, systematic review advanced dual‐functional electrodes aiming at cathode anode side simultaneously scarce. Herein, this points such summarizes recent progress from select materials to designs. First, rough challenges ordinary solutions on single cell are illustrated. Then, potentials different discussed, as carbon‐based materials, single‐atom catalysts (SACs), transition metal compounds (TMCs), heterostructure hybrids (HHs), polymers. After that, design methods for with high performance explored summarized slurry‐coating self‐supporting (electrospinning (ES), 3D printing (3DP), solvent method (SM), chemistry vapor deposition (CVD) vacuum filtration (VF)). Besides, possibility applying other metal‐sulfur discussed. Finally, principles prospects in future research proposed guidelines.

Язык: Английский

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Synergistic restriction of polysulfides enabled by cobalt@carbon spheres embedded CNTs: A facile approach for constructing sulfur cathodes with high sulfur content

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 674, С. 959 - 971

Опубликована: Июнь 29, 2024

Despite the bright fortune of lithium-sulfur (Li-S) batteries as one next-generation energy storage systems owing to ultrahigh theoretical density and earth-abundance sulfur, crucial challenges including polysulfide shuttling low sulfur content cathodes need be overcome before commercial survival cathodes. Herein, cobalt/carbon spheres embedded CNTs (Co-C-CNTs) are rationally designed multifunctional hosts synergistically address drawbacks The host is synthesized by a facile pyrolysis using Co(OH)

Язык: Английский

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Fence‐Type Molecular Electrocatalysts for High‐Performance Lithium‐Sulfur Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Июль 22, 2024

Abstract Improving the slow redox kinetics of sulfur species and shuttling issues soluble intermediates induced from multiphase reactions are crucial factors for developing next‐generation high‐energy‐density lithium‐sulfur (Li−S) batteries. In this study, we successfully constructed a novel molecular electrocatalyst through in situ polymerization bis(3,4‐dibromobenzene)‐18‐crown‐6 (BD18C6) with polysulfide anions on cathode interface. The crown ether (CE)‐based polymer acts as spatial “fence” to precisely control unique characteristics species, which could confine substance within its interior interact lithium polysulfides (LiPSs) optimize reaction barrier species. structure double‐sided Li + penetrability CE molecule may also prevent catalytic sites being covered by during cycling. This new fence‐type mitigates “shuttle effect”, enhances activity promotes formation three‐dimensional stacked sulfide (Li 2 S) simultaneously. It thus enables batteries exhibit superior rate performance cycle stability, inspire development facing analogous electrochemical energy‐efficient conversion process.

Язык: Английский

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