Crystalline‐Amorphous Phase and Oxygen Vacancies Synergistically Regulate Vanadium Electronic States for Unleashing Zinc‐Ion Storage Performance

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Abstract Zinc‐ion capacitors (ZICs) are emerging as a compelling choice for energy storage in future, promising high power and densities coupled with eco‐friendly characteristics. This work presents novel approach to enhance the performance of ZICs by employing one‐step solvothermal synthesis growth V‐MOF on surface V 2 CT X ‐MXene, followed annealing fabricate 3D cross‐linked VO /V ‐MXene‐x(VO /MXene‐x) composite. The unique structure demonstrates excellent conductivity redox reaction activity, which significantly shortens Zn 2+ diffusion path. Moreover, intertwined crystalline‐amorphous efficiently suppresses lattice volume expansion during (de)intercalation. Density functional theory (DFT) reveals that amorphous O 5 enhances conductivity, lowers capture barrier, improves charge transfer efficiency. introduction oxygen vacancies further electronic transport. /MXene‐4 composite exhibits specific capacity 336.39 mAh g −1 at 1 A , maintaining 213.06 10 indicating outstanding rate performance, along an density 356.27 Wh kg 1280 W . offers insights design electrode materials feature phases, providing valuable into ion transport mechanisms strategies kinetics.

Язык: Английский

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Tetrafluoro(aryl)sulfanylated Bicyclopentane Crystals That Self-Destruct upon Cooling

Journal of the American Chemical Society, Год журнала: 2025, Номер 147(2), С. 1463 - 1473

Опубликована: Янв. 6, 2025

Whereas single crystals of organic compounds that respond to heat or light have been reported and studied in detail, studies on crystalline elicit an extreme mechanical response upon cooling very low temperatures are relatively rare the chemical literature. A tetrafluoro(aryl)sulfanylated bicyclopentane synthesized our laboratory was discovered exhibit such behavior; i.e., jumped forcefully disintegrated below ∼193 K. Accordingly, origin this low-temperature thermosalient effect investigated through NMR, SC-XRD, PXRD, microscopy, DSC, Raman, Brillouin experiments. To surprise, DSC experiments suggest phenomenon can neither be attributed solely a transformation nor phase transition entire material. Rather, XRD, provide evidence built-up strain released from crystal self-destruction may associated with microstructure occurs another material (i.e., impurity) crystal. This study demonstrates molecular structural changes impurity phases (which not necessarily visible by X-ray diffraction) significant impact behavior bulk Thus, role considered more heavily future mechanistic mechanically responsive crystals.

Язык: Английский

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Realizing an Energy-Dense Potassium Metal Battery at −40 °C via an Integrated Anode-Free and Dual-Ion Strategy

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

Опубликована: Янв. 9, 2025

Potassium (K)-based batteries hold great promise for cryogenic applications owing to the small Stokes radius and weak Lewis acidity of K+. Nevertheless, energy-dense (>200 W h kg–1cathode+anode) K under subzero conditions have seldom been reported. Here, an over 400 kg–1cathode+anode battery is realized at −40 °C via anode-free dual-ion strategy, surpassing these state-of-the-art even most Li/Na low temperatures (LTs). By introduction a strongly associating salt as additive this battery, anion-derived solid electrolyte interphase can be established highly reversible, zero-excess plating/stripping behavior on bare current collector. Meanwhile, binary solvent rationally designed lowering cation desolvation energy barrier, which ensures comparably facile desolvation-free anion kinetics in structure LTs. Consequently, K||Al half-cell delivers high Coulombic efficiency 99.98% °C. pairing with high-energy cathode, proof-of-concept (N/P = 0) fabricated, delivering record-high density 407 stable cycling 183 cycles (80% capacity retention) This work paves way toward extreme scenarios.

Язык: Английский

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A High‐Rate and Ultrastable Re₂Te₅/MXene Anode for Potassium Storage Enabled by Amorphous/Crystalline Heterointerface Engineering

Advanced Materials, Год журнала: 2024, Номер 36(44)

Опубликована: Сен. 13, 2024

Abstract The pursuit of anode materials capable rapid and reversible potassium storage performance is a challenging yet fascinating target. Herein, heterointerface engineering strategy proposed to prepare novel superstructure composed amorphous/crystalline Re 2 Te 5 anchored on MXene substrate (A/C‐Re /MXene) as an advanced for potassium‐ion batteries (KIBs). A/C‐Re /MXene exhibits outstanding capacity (350.4 mAh g −1 after 200 cycles at 0.2 A ), excellent rate capability (162.5 20 remarkable long‐term cycling (186.1 over 5000 cycles), reliable operation in flexible full KIBs, outperforming state‐of‐the‐art metal chalcogenides‐based devices. Experimental theoretical investigations attribute this high the synergistic effect with built‐in electric field elastic MXene, enabling improved pseudocapacitive contribution, accelerated charge transfer behavior, K + ion adsorption/diffusion ability. Meanwhile, combination intercalation conversion reactions mechanism observed within /MXene. This work offers new approach developing tellurides‐ MXene‐based anodes achieving stable cyclability fast‐charging KIBs.

Язык: Английский

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Polyoxometalate-derived bi-functional crystalline/amorphous interfaces with optimized d-electron configuration for efficient self-powered hydrazine-seawater splitting

Chemical Engineering Journal, Год журнала: 2024, Номер 488, С. 150897 - 150897

Опубликована: Апрель 1, 2024

Язык: Английский

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Crystalline-amorphous hybrid CoNi layered double hydroxides for high areal energy density supercapacitor

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 683, С. 1 - 13

Опубликована: Дек. 10, 2024

Язык: Английский

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Integrating Ni2P crystalline-NiFeBP amorphous heterojunction nanosheets on hierarchical nickel foam for superior overall water splitting

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159290 - 159290

Опубликована: Янв. 1, 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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The advances in innovative amorphous noble-metal-based electrocatalysts

Chem Catalysis, Год журнала: 2025, Номер unknown, С. 101324 - 101324

Опубликована: Март 1, 2025

Язык: Английский

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Unlocking enhanced electrochemical performance through oxygen–nitrogen dual functionalization of iron–nickel–sulfide for efficient energy storage systems

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(28), С. 17369 - 17381

Опубликована: Янв. 1, 2024

This study showcases a supercapacitor device with oxygen–nitrogen dual functionalized and sulfurized iron–nickel hydroxysulfide, demonstrating high performance stability for energy storage.

Язык: Английский

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