Synergistic Effects of Confinement Structure and Local‐Expanded Interlayer Spacing in Fe₂Mo₃O₈@C@MoS₂ Toward High‐Efficient Sodium Ion Storage

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

Published: April 22, 2024

Abstract Developing multicomponent composite materials with delicate morphology and tailored structure is of vital importance for designing advanced sodium‐ion batteries (SIBs). Herein, a confinement‐structured Fe 2 Mo 3 O 8 @C@MoS local‐expanded interlayer spacing designed via high‐temperature phase transition from FeMoO 4 to the tactically introducing dopamine molecules into MoS nanosheets. By analysis in situ generated solid electrolyte interphase film different electrolytes, favorable compatibility ether‐based electrolytes well illustrated. Importantly, sodium storage mechanism detailed structural evolution are established first time by X‐ray diffraction. Furthermore, theoretical calculations indicate unique facilitates internal charge transfer enhances Na + adsorption ability. Thanks confinement structure, interlayers robust framework, achieves high reversible specific capacity 636 mAh g ‒1 at 0.1 A , excellent rate capability (301 5.0 ) ultralong cycling stability (365 –1 after 6000 cycles 2.0 ). The study provides an essential understanding promising strategy constructing high‐performance anodes SIBs.

Language: Английский

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Advanced potassium ion batteries anode enhanced by Fe-doping strategy

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 686, P. 232 - 241

Published: Jan. 22, 2025

Language: Английский

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First-principles study on the gas sensing properties of precious metal modified(Ag, Au) Janus MoSeTe for lithium ion thermal runaway gas

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 352, P. 128260 - 128260

Published: June 1, 2024

Language: Английский

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Design and Optimization of Iron‐Based Superionic‐Like Conductor Anode for High‐Performance Lithium/Sodium‐Ion Batteries

Small Methods, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 11, 2024

Abstract Metal selenides have received extensive research attention as anode materials for batteries due to their high theoretical capacity. However, significant volume expansion and slow ion migration rate result in poor cycling stability suboptimal performance. To address these issues, the present work utilized multivalent iron ions construct fast pathways similar superionic conductors (Fe‐SSC) introduced corresponding selenium vacancies enhance its Based on first‐principles calculations molecular dynamics simulations, it is demonstrated that addition of presence reduced material's function adsorption energy, lowered barriers, enhances Li + Na . In Li‐ion half batteries, this composite material exhibites reversible capacity 1048.3 mAh g −1 at 0.1 A after 100 cycles 483.6 5.0 1000 cycles. Na‐ion 687.7 200 325.9 It proven based Fe‐SSC great applications both batteries.

Language: Английский

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Unconventional thick cobalt telluride electrodes enable homogeneous ion flow for high capacity, fast and safe potassium storage

Nano Today, Journal Year: 2024, Volume and Issue: 56, P. 102269 - 102269

Published: April 15, 2024

The demand for high-energy density, fast-charging, and safe potassium-ion batteries (PIBs) is crucial large-scale applications in electric vehicles grid systems. Despite the potential of thick electrode designs by a conventional technique (CTEs) to boost energy they often encounter challenges such as reduced capacity, limited cycling lifespan, localized short circuits. Here, we present novel cobalt telluride composite anode simple tellurization subsequent heat reduction, featuring Co1.67Te2 nanoparticles uniformly embedded within an N-doped carbon layer on trace amount graphene oxide (CT@NC/rGO). By constructing low tortuosity electrodes (LTEs), homogeneous distribution potassium ions current density achieved, resulting enhanced storage performance. CT@NC/rGO LTEs demonstrate excellent discharge capacities: 311.7, 276.5, 243.7 mA h g−1 after 500 cycles at 0.25 A mass loadings 1.4, 1.9, 2.8 mg cm−2, respectively. At higher 0.5 g−1, capacities 650 are 245.3, 175.6, 159.2 1.6, 2.4, 3.0 These improvements attributed pseudocapacitive behavior, charge resistance, accelerated ion diffusion kinetics, evidenced experimental simulation studies. proposed strategy synthesizing high-density holds promise developing high-performance metallic compound PIBs potentially extending other types

Language: Английский

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Flexible Potassium-Ion Batteries Enabled by Encapsulating Hollow NiSe/SnSe Nanocubes within Freestanding N-doped Carbon Nanofibers

Energy storage materials, Journal Year: 2024, Volume and Issue: 74, P. 103908 - 103908

Published: Nov. 14, 2024

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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Advanced Multiscale Modeling of Potassium‐Ion Batteries for Interplay of Electrochemical and Mechanical Behavior Across Scales

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

Published: April 6, 2025

Potassium‐ion batteries present a promising alternative to address the global lithium shortage. However, their electrochemical performance is significantly hampered by severe volume expansion of graphite electrodes upon K‐ion intercalation. In this work, comprehensive multiscale modeling approach introduced analyze both and mechanical behavior potassium‐ion batteries, integrating diffusion coefficient properties derived from density functional theory calculations with 3D particle network model. The research demonstrates that concentration influences material properties, such as coefficients, Young's modulus, shear affecting stability potassium‐graphite intercalation compounds. Notably, study reveals KC 24 exhibits superior compared 16 despite its lower due enhanced electrostatic interactions. Additionally, dependence crucial for accurate modeling, constant values lead substantial discrepancies. findings highlight importance considering staging transitions precise prediction optimization batteries. This work lays foundation future into mitigating degradation improving battery through advanced techniques.

Language: Английский

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Dynamic Induction of Conversion−Based Anode Degradation by Valence State and Mechanical Cracks

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

Published: April 26, 2025

Abstract Electrochemical energy storage through conversion reactions in crystalline electrode materials primarily depends on the size of guest ions. In this study, a combination synchrotron−based transmission X−ray microscopy and absorption near edge spectroscopy is utilized to reveal dynamic physicochemical changes micro−regions spherical NiS 2 active particles during potassiation/depotassiation process. The findings show that, as degree potassiation increases, visible cracks voids form within bulk material, with significant differences chemical valence states metal elements between inner outer regions. Furthermore, induce formation new cracks, which propagate extensively into bulk, serving root cause particle failure. Based these observations, it also demonstrated that failure phenomenon can be mitigated dimensional engineering strategies, paving way for development high−capacity highly stable potassium−ion batteries.

Language: Английский

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Constructing three-dimensional MoSSe/CNTs anode for high-rate and capacity enhancement lithium-ion batteries

Journal of Materials Science, Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

Language: Английский

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