Constructing Iron Vacancies in Thiospinel FeIn₂S₄ to Modulate Fe D‐Band Center and Accelerate Sodiation Kinetics Enabling High‐Rate and Durable Sodium Storage

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 5, 2025

Abstract The bimetallic synergies effect and combined conversion/alloying mechanism endow thiospinel FeIn 2 S 4 with great potential as an anode material for sodium‐ion batteries (SIBs). However, their inconsistent synthesis, severe volumetric expansion, sluggish reaction kinetics typically lead to unsatisfactory cyclic stability rate capability. Herein, organic framework derived @N/S‐C microrods Fe vacancies is presented fast, durable, reversible sodium storage. presence of significantly modulates the d ‐band center decreases strength Fe─S bond facilitating sodiation jointly. Moreover, a thin stable solid electrolyte interface film inorganic‐rich components formed by induction. Combined N, co‐doped porous carbon matrix, optimal sample delivers excellent capability 381 mAh g −1 at 10 A performance (448 after 500 cycles 1 ). Furthermore, assembled full‐cells also exhibit superior electrochemical 87.5% capacity retention long‐term evaluations. This work presents promising strategy structural regulation sulfides advanced anodes SIBs.

Язык: Английский

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Mechanically Robust Bismuth-Embedded Carbon Microspheres for Ultrafast Charging and Ultrastable Sodium-Ion Batteries

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Advancements in the development of fast-charging and long-lasting microstructured alloying anodes with high volumetric capacities are essential for enhancing operational efficiency sodium-ion batteries (SIBs). These anodes, however, face challenges such as declined cyclability rate capability, primarily due to mechanical degradation reduced by significant changes (over 252%) slow kinetics storage. Herein, we introduce a novel anode design featuring densely packed bismuth (Bi) embedded within highly conductive carbon microspheres overcome aforementioned challenges. Remarkably, loading Bi tap density 2.59 g cm–3 possesses strength exceeding 590 MPa limits volume swelling only 10.9% post-sodiation. This demonstrates capacity (908.3 mAh cm–3), ultrafast chargeability (200 A g–1, full charge/discharge just 5.5 s), outstanding over 12,000 cycles maintains exceptional cycling stability even at −30 °C. The cell paired Na3V2(PO4)3 cathode retains 80% after 600 36 C, demonstrating remarkable capability 126 C (full 28.6 s). Our comprehensive experimental evaluations chemo-mechanical simulations shed light on mechanisms underpinning anode's superior performance. marks advancement durable high-performance SIBs.

Язык: Английский

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Rapid and Highly Selective Dopamine Sensing with CuInSe2-Modified Nanocomposite

Journal of Composites Science, Год журнала: 2025, Номер 9(3), С. 123 - 123

Опубликована: Март 6, 2025

As an important neurotransmitter, the concentration of dopamine (DA) reflects certain physiological conditions and DA-related diseases. Rapid monitoring DA levels is great significance in regulating body health. However, regular electrochemical sensors suffer from poor sensitivity, low selectivity interference immunity, as well a complex preparation process. Herein, we developed accessible cost-effective sensor with copper indium selenide (CuInSe2 or CIS)-modified screen-printed carbon electrode for discrimination. This was using facile one-step hydrothermal method without high-temperature quenching. Benefitting inherent merits CIS conversion Cu2+ Cu+ during catalytic reaction, attained both excellent sensitivity (2.511 μA·µM−1·cm−1) among multiple substances interfering DA. work demonstrates potential to improve analytical performance traditional sensors.

Язык: Английский

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High-performance asymmetric supercapacitor applications enabled by nickel foam-supported CoTe/NiCo2S4 core-shell nanorods

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180023 - 180023

Опубликована: Март 1, 2025

Язык: Английский

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ZnCoS/ZnCoLDH lamellar core-shell materials for high-performance asymmetric supercapacitors

Journal of Energy Storage, Год журнала: 2025, Номер 110, С. 115250 - 115250

Опубликована: Янв. 6, 2025

Язык: Английский

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The Charge Self‐Regulation Effect Induced by Microcrystalline‐Amorphous Heterointerface Network Toward Fast Charging Sodium Ion Batteries

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 5, 2025

Abstract Sodium‐ion batteries (SIBs), recognized for their abundant resource availability, are emerging as a viable alternative to conventional batteries. Nevertheless, sluggish electrons/ions kinetics impedes further advancement in SIBs technology. Herein, novel microcrystalline‐MoSe 2 /amorphous‐MoSe x O y (C‐MoSe /A‐MoSe ) is developed through situ low‐temperature oxidation of crystalline MoSe . The microcrystalline acts robust framework, while the amorphous phase fills interstitial spaces. This anode material characterized by an optimized microcrystalline‐amorphous heterointerface. resultant charge self‐regulation effect can be exploited modulate active electron states, thereby ensuring high‐speed and stable sodium storage performance. heterointerface demonstrates ultrahigh specific capacity (641.0 mAh g −1 at 0.5 A maintains splendid rate performances up 100 (324.2 ). Detailed theoretical experimental researches indicate that enhanced performance results from production electronic which initiated C‐MoSe , featuring Mo─Se bonds, regulates interfacial redistribution facilitate transfer across interface between phases. findings suggest effect, prompted network, inherently accelerates electron/ion transport, offering promising electrode design strategy fast‐charging

Язык: Английский

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Ge–Si/C Nanofiber Composite with Enhanced Cyclic Stability and Rate Capability for Lithium-Ion Batteries

ACS Applied Nano Materials, Год журнала: 2025, Номер 8(5), С. 2196 - 2204

Опубликована: Янв. 23, 2025

To deal with the low conductivity and structural instability of silicon (Si)-based anode, a Ge–Si/C nanofiber (Ge–Si/CNF) composite is fabricated based on different starting reaction potentials for Si Ge lithium excellent Ge. Sucrose innovatively introduced as spinning aid to maintain carbon fiber structure derived from poly(vinyl alcohol) polymer. When Ge–Si/CNFs are investigated anode material lithium-ion batteries, it demonstrates cyclic stability rate capability. Specifically, can still retain 764.1 mA h g–1 at 0.5 A after 1000 cycles, its capacity retention reaches 72.1%. Significantly, specific 1168.7 2.0 g–1, which restored 1731.4 when adjusted back 0.1 g–1. The storage Ge–Si/CNF attributed effective release stress during lithiation/delithiation process because one component lithiated, other act buffer matrix improving stability. Additionally, addition fibers speed up transfer Li+ electrons.

Язык: Английский

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

Small Methods, Год журнала: 2024, Номер unknown

Опубликована: Сен. 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.

Язык: Английский

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Electron‐Spin Regulation Driving Heterointerface Electron Distribution and Phase Transition toward Ultrafast and Durable Sodium Storage

Small, Год журнала: 2024, Номер unknown

Опубликована: Сен. 16, 2024

Abstract Phase engineering is an effective strategy for modulating the electronic structure and electron transfer mobility of cobalt selenide (CoSe 2 ) with remarkable sodium storage. Nevertheless, it remains challenging to improve fast‐charging cycling performance. Herein, a heterointerface coupling induces phase transformation from cubic CoSe orthorhombic accompanied by formation MoSe construct /MoSe heterostructure decorated N‐doped carbon layer on 3D graphene foam @NC/GF). The incorporated Mo cations in bridged o‐CoSe not only act donor regulate charge‐spin configurations more active states but also trigger upshift d/p band centers decreased ∆ d‐p center gap, which greatly enhances ion adsorption capability lowers diffusion barrier. As expected, @NC/GF anode demonstrates high‐rate 447 mAh g −1 at A excellent cyclability 298 1 over 1000 cycles. work deepens understanding elaborate construction heterostructured electrodes high‐performance SIBs.

Язык: Английский

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Cobalt-doped iron-based selenide for sodium-ion battery anode: Insight into the doping and sodium storage mechanism

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161949 - 161949

Опубликована: Март 1, 2025

Язык: Английский

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