Chromium-doped tunnel-structured VO2(B) nanorods as high-capacity and stable cathode materials for aqueous zinc-ion batteries

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 114, P. 115826 - 115826

Published: Feb. 14, 2025

Language: Английский

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Advances on Defect Engineering of Niobium Pentoxide for Electrochemical Energy Storage

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

Published: Jan. 22, 2025

Abstract The reasonable design of advanced anode materials for electrochemical energy storage (EES) devices is crucial in expediting the progress renewable technologies. Nb 2 O 5 has attracted increasing research attention as an candidate. Defect engineering regarded a feasible approach to modulate local atomic configurations within . Therefore, introducing defects into considered be promising way enhance performance. However, there no systematic review on defect process. This systematically analyzes first crystal structures and mechanisms Subsequently, systematical summary latest advances EES presented, mainly focusing vacancy modulation, ion doping, planar defects, porosity, amorphization. Of particular note effects : improving electronic conductivity, accelerating diffusion, maintaining structural stability, active sites. further summarizes diverse methodologies inducing commonly used techniques characterization In conclusion, article proposes current challenges outlines future development prospects achieve high‐performance with both high power densities.

Language: Английский

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Orbital and Electrical Dual Function of Polymer Intercalant for Promoting NH₄⁺ Storage in Vanadium Oxide Anode

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

Published: Jan. 26, 2025

Abstract Polymer‐intercalated metal oxides have attracted considerable attention for ammonium ions (NH 4 + ) storage due to their enhanced interlayer space, which, through the pillar effect, facilitates rapid and efficient transport of NH . However, understanding remains limited regarding how polymer intercalants affect intrinsic structure host materials, especially variations in atomic orbital electronic structural induced by intercalants. Herein, a polyaniline‐intercalated vanadium oxide (P‐VO x is developed and, first time, its behavior validated as an anode material. Using various spectroscopy techniques combined with theoretical simulation, changes are analyzed intercalant. Spectroscopy studies reveal that insertion polyaniline optimizes V 2 O 5 , promoting transition electrons 3d xy state increasing occupation t 2g orbital, thereby enhancing electrical conductivity. Computational results confirm P‐VO lowers migration barrier, electron/NH transfer. As result, electrode demonstrates outstanding capacity unprecedented long‐term cycling stability. This study provides new insights into intercalant underscores advantages polymer‐intercalated VO high‐performance storage.

Language: Английский

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A high-entropy zero-strain V-based cathode for high performance aqueous zinc-ion batteries

Energy storage materials, Journal Year: 2025, Volume and Issue: 76, P. 104098 - 104098

Published: Feb. 7, 2025

Language: Английский

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Ultrafast Tailoring Amorphous Zn0.25V2O5 with Precision‐Engineered Artificial Atomic‐Layer 1T′‐MoS2 Cathode Electrolyte Interphase for Advanced Aqueous Zinc‐Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)

Published: Sept. 30, 2024

Vanadium (V)-based oxides as cathode materials for aqueous zinc-ion batteries (AZIBs) still encounter challenges such sluggish Zn

Language: Английский

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Engineering vanadium vacancies to accelerate ion kinetics for high performance zinc ion battery

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 439 - 448

Published: Jan. 7, 2025

Language: Английский

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Promoted de-solvation effect and dendrite-free Zn deposition enabled by in-situ formed interphase layer for high-performance zinc-ion batteries

Energy Materials, Journal Year: 2025, Volume and Issue: 5(3)

Published: Jan. 11, 2025

The use of aqueous electrolytes and Zn metal anodes in Zn-based energy storage systems provides several benefits, including competitive density, excellent safety, low cost. However, dendrites growth slow ion transfer at the electrode/electrolyte interphase reduce cycle stability rate capability anode. Herein, V2O5-x interface layer was rationally controllably constructed on surface through situ spontaneous redox reaction between V2O5 layer, with an optimized thickness, plays a crucial role screening de-solvation, leading to uniform dispersion Zn2+ ions dendrite-free morphology. Moreover, as transports V element low-valence state allows oxygen anions bind more easily Zn2+. This interaction enables fast diffusion channel interfacial layer. Consequently, symmetric cells V@Zn achieve stable plating/stripping for than 1400 h 1 mA cm-2. In particular, full cell paired cathode exhibits capacity nearly 275.9 g-1 5 A after 2500 cycles without obvious deterioration, further highlighting potential practical applications.

Language: Английский

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Synergistic Oxygen Defect Engineering and Neodymium-Ion Intercalation Endows MIL-88B(V)-Derived V₂O₅ with Fast Diffusion Kinetics and Enhanced Cycling Stability for Aqueous Zinc-Ion Batteries

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: 13(6), P. 2553 - 2563

Published: Jan. 31, 2025

Vanadium-based oxides with unique layered structures and multiple oxidation states have attracted considerable attention for aqueous zinc-ion batteries (AZIBs). However, the inferior conductivity nearly nonporous structural characteristics of commercial V2O5 inevitably hinder transport electrons/ions, inherently narrow interlayer spacing strong electrostatic interactions severely restrict further development cathodes. In this work, neodymium (Nd) ions were employed as guests to intercalate into MIL-88B(V)-derived (denoted OV-NVO) by a one-step hydrothermal process stable cathode materials AZIBs. Benefiting from its well-designed honeycomb-like porous structure, large surface area, expanded spacing, abundant oxygen vacancies, feeble interactions, OV-NVO delivered prominent discharge capacity 455.2 mAh g–1 at 0.1 A exhibited satisfactory rate capability (341.5 5.0 g–1) cycling stability (90.8% retention after 2000 cycles g–1). Impressively, assembled Zn//OV-NVO flexible battery can operate stably under extreme bending conditions exhibits superior electrochemical behavior. Furthermore, reversible Zn2+ storage mechanism evolution analyzed kinetic analysis, ex situ characterizations, density functional theory calculations. This synergistic strategy combining Nd-ion intercalation defect engineering provides an effective approach design high-performance vanadium-based materials, offering more possibilities practical applications

Language: Английский

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Exploration of the zinc storage mechanism and kinetics of vanadium sulfides/reduced graphene oxide composites for aqueous zinc-ion battery cathodes

Advanced Composites and Hybrid Materials, Journal Year: 2025, Volume and Issue: 8(2)

Published: Feb. 25, 2025

Language: Английский

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Enabling Fast and Stable Zinc-Ion Storage in Vanadyl Phosphate Cathodes

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

VOPO4·2H2O (VOP) has attracted significant attention as a cathode material for aqueous zinc-ion batteries owing to its layered structure and high-voltage plateau. However, application is hindered by sluggish Zn2+ transport kinetics instability in electrolytes, leading rapid capacity fading over cycling. In the present work, diethylene glycol (DEG) pre-intercalated VOP (DEG-VOP) with flower-like morphology prepared facile hydrothermal method. The DEG molecules enlarge interplanar lattice of (001) plane introduce oxygen vacancies, accelerating mass charge transfer kinetics. addition, pre-intercalation induces self-assembly nanosheets into structure, which exposes more (201) planes, providing additional ion channels. also enhances hydrophobicity VOP, effectively suppressing decomposition dissolution. These result significantly improved discharge capacity, retention 86% after 2000 cycles at 1 A g–1.

Language: Английский

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