Cu‐Driven Active Cu₂Se@MXene Heterointerface Reconstruction and Co Electron Reservoir Toward Superior Sodium Storage

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

Abstract Heterostructure engineering and active component reconstruction are effective strategies for efficient rapid charge storage in advanced sodium‐ion batteries (SIBs). Herein, sandwich‐type CoSe 2 @MXene composites used as a model to reconstruct new Cu Se@MXene heterostructures by situ electrochemical driving. The MXene core provides interconnected pathways electron ion conduction, while also buffering volumetric expansion stabilize the structure. This reconstructed heterointerface features abundant sodium sites, enhanced Na + adsorption, diffusion kinetics, thus increasing capacity. Moreover, elevated Co valence state during discharge process allows it act an reservoir provide additional supply Se conversion accelerate kinetics. When employed anode SIBs, electrode exhibits high capacity (694 mAh g −1 at 0.1 A ), excellent rate performance (425 20 exceptional durability (437 after 10 000 cycles 5 with 0.0014% decay per cycle). mechanism of is further revealed through ex characterization theoretical calculations. work approach designing conversion‐type anodes SIBs.

Language: Английский

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Promoting Robust and Rapid Na‐Ion Storage of Molybdenum‐Based Sulfide via Rational Hetero and Hollow Structure Design

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract Molybdenum disulfide (MoS 2 ), characterized by its two‐dimensional structure and high theoretical specific capacity, is considered a prospective anode of Na‐ion battery. However, the cycling rate capabilities are hampered sluggish charge transfer kinetics poor structural stability. To overcome issues, most efforts have been focused on optimizing MoS . Nevertheless, rationally designing that can present rapid durable storage while ensuring large remains challenges. Herein, /MnS heterostructure featuring sphere‐like hollow morphology designed according to Ostwald ripening process Kirkendall effect. This construction effectively establish an interfacial built‐in electric field activated MnS , which exhibit P‐type N‐type semiconductor characteristics, respectively, thereby promoting electrochemical kinetics. Moreover, excellent stability after repeated (de)sodiation processes remarkably achieved thanks robust design, significantly achieving outstanding tolerance changes. Consequently, delivers capacity (594.8 mAh g −1 at 0.1 A superior performance (up 100 ultrastable capability (30 000 cycles with ≈81.4% retention). The work affords effective optimization tactic develop high‐performance conversion‐type electrodes for alkali‐ion batteries.

Language: Английский

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Defective MoSxSe2-x with Functionalized Sulfurized-Selenized Polyacrylonitrile for High-Rate Sodium/Potassium-Ion Batteries with Wide-Temperature Tolerance

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 178661 - 178661

Published: Jan. 1, 2025

Language: Английский

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Intermediate-motivated charge transfer via alternate dipoles accelerating the deep redox of iodine/sulfur/molybdenum for high-performance multiple ion batteries

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Dual Regulation of Anion Vacancy-Modified MoSSe Nanosheets in Mesoporous Carbon Nanospheres for High-Performance Sodium Storage

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

Published: Feb. 13, 2025

Owing to their layered structure and higher theoretical specific capacity, MoS2-based materials have evoked tremendous attention for sodium storage. However, sluggish ionic transport dynamics unavoidable volume variation always lead an unsatisfactory electrochemical performance, thereby hindering further development. Herein, the Se-doped MoS2 nanosheets confined in hollow mesoporous carbon nanospheres (MoSSe@C) were successfully prepared via a synergistic strategy combining defect design optimization. Thereinto, larger Se atom doping could regulate crystal provide abundant defects, leading increased conductivity, fast diffusion kinetics, active sites. Besides, it also effectively expand interlamellar spacing of internal nanosheets, releasing more intrafacial sites The external adapt fluctuation MoSSe@C electrode during repeated cycling. Furthermore, interior anion defects induced by exterior HMCs synergistically boost conductivity fasten redox kinetics electrode. As result, electronic is tailored both internally externally, contributing greatly rapid reaction dynamics. Thus, exhibits favorable performance (450/150 mAh g–1 at 0.1 A g–1) half/full cells, respectively.

Language: Английский

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Smart Construction of MoS₂ on Carbon Cloth Flexible Electrodes as High‐Performance Anode for Lithium‐Ion and Sodium‐Ion Batteries

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(12)

Published: March 1, 2025

Abstract A self‐supporting flexible electrode, composed of 1T phase MoS₂ nanosheets synthesized on carbon cloth, was fabricated using a one‐step hydrothermal method. This electrode material exhibits outstanding electrochemical performance when utilized as the anode for both lithium‐ion and sodium‐ion batteries. In batteries, capacity approximately 600 mAh g⁻¹ is retained after 150 cycles at current density 0.1 g⁻¹. high 500 sustained even 100 cycles. Compared to powder cloth with that has been grown treated through annealing, electrodes demonstrate enhanced performance. can be attributed substrate, which significantly enhances stability conductivity MoS₂. contrast, annealing induces transformation 1T‐phase into more stable yet less conductive 2H phase, thereby diminishing its efficiency. underscores benefits unannealed MoS₂‐carbon composite material.

Language: Английский

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Ultrafast Na⁺ Diffusion Enabled by Defective 3D in₂S₃/MXene Nanostructure toward High‐Rate Sodium Ion Batteries

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Slow diffusion kinetics caused by the low conductivity and large volume changes of metal sulfides (MSs) during repeated sodiation/desodiation processes greatly limit implementation high‐rate sodium ion batteries (SIBs). To address this, inspired vacancy defect engineering, for first time, defective 3D In 2 S 3 /MXene nanostructure with high‐density vacancies strong interface bonding is developed as fast‐charging anode SIBs. This design enables material to have a Na + energy barrier (0.28 eV) absorption (−1.68 eV), resulting in high coefficient (5.01 × 10 −12 cm s −1 ) pseudocapacitive contribution 97.3%. Moreover, exhibits reversible multistep intercalation‐conversion reaction mechanism superior electrochemical kinetics. Consequently, assembled SIBs display performance (202.2 mAh g at 100 A long‐term cycling stability over 5000 cycles 0.0074% decay per cycle 20 . On this basis, Na‐ion full cell assembled, indicating practical application material. study sheds light on functional electrode materials long‐lifespan storage devices.

Language: Английский

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Investigations of Mechanisms Leading to Capacity Differences in Li/Na/K‐Ion Batteries with Conversion‐Type Transition‐Metal Sulfides Anodes

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

Published: Nov. 4, 2024

Abstract Conversion‐type transition‐metal sulfides (CT‐TMSs) have been extensively studied as the anode of Li/Na/K‐ion batteries due to their high theoretical capacity. An issue with use material in battery is that a large capacity difference commonly observed. However, underlying mechanism leading problem still unknown. Here, mechanisms CT‐TMSs anodes storage are elucidated, which arises from conversion degree and size products. Specifically, increase ionic radius will cause insertion‐reaction ion diffuse energy barrier conversion‐reaction Gibbs free energies phase transformation decrease reaction kinetics, causes an products, thus reduction The amount products inevitably reduce spin‐polarized electrons injection into Fe corresponding ions during ion‐electron decoupling storage, reducing research clarifies Li/Na/K providing valuable insights for designing high‐capacity anodes.

Language: Английский

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Reduced Na–S bond adsorption of WSSe enabling fast reaction kinetics in the sodium-ion battery

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 1, 2024

Language: Английский

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