Activating Sodium Intercalation in Cation‐Deficient Fe₃O₄ Through Mo Substitution

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

Published: March 20, 2025

Abstract Magnetite (Fe 3 O 4 ), a conversion‐type anode material, possesses high capacity, cost‐effectiveness and environmental friendliness, positioning it as promising candidate for the large‐scale energy storage applications. However, multi‐electron reactions in sodium‐ion batteries face challenges originated from electrochemical inactivity of Na + intercalation oxides. In this work, controllable Fe vacancies are tailored lattice through gradient Mo doping. The pair distribution function local structure analysis reveals that key to stabilizing more lies uniform occupation dopants at both tetrahedral (8 ) octahedral (16 d sites. vacancy‐rich structure, featuring 7.3% vacancies, achieves significantly enhanced capacity 127 mAh g −1 after 150 cycles 100 mA , comparison with 37 defect‐free . A comprehensive understanding how defective relates performance is presented, combining physical‐electrochemical characterizations theoretical calculations. occurred Mo‐O interactions enhances electronic conductivity diminishes electrostatic between intercalated 2− Concurrently, facilitate bulk migration lower barrier. This study presents prospect modulating transition metal oxides activate fast reversible sodium toward high‐performance batteries.

Language: Английский

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NaCl-Assisted One-Step CVD for In-Plane 1T/1H Heterophase Homojunctions in Monolayer WS₂

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

Published: April 29, 2025

Two-dimensional WS2 offers promising advantages for various applications due to its semiconducting 1H phase and metallic 1T phase. However, the instability of difficulty achieving a stable coexistence present significant challenges. Here, we adopt NaCl-assisted one-step chemical vapor deposition method that enables spatial precise control phases within monolayer WS2. The diagram establishes clear correlation between precursor ratios structural Density functional theory calculations reveal stability difference at electronic level. Calculated work functions are consistent with experimental Kelvin probe force microscopy, confirming properties heterophase interface. This provides scalable efficient approach engineering in WS2, great potential advancing optoelectronic devices catalytic systems.

Language: Английский

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Zn-substituted Co3O4 Crystal Anchored on Porous Carbon Nanofibers for High Performance Supercapacitors

Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 53, P. 105048 - 105048

Published: Sept. 2, 2024

Language: Английский

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Mediation of the electrochemical polarization for durable zinc anode

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

A KSeCN electrolyte additive for aqueous zinc ion batteries enhances the electrochemical polarization of anode while mitigating concentration polarization, leading to more uniform Zn plating.

Language: Английский

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Efficient storage of zinc ions in MoS2 is facilitated by F and P co-doping induced S vacancies

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 89, P. 111852 - 111852

Published: April 26, 2024

Language: Английский

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Heterogeneous Interface Design with Oxygen Vacancy-Rich Assistance High-Capacity Titanium-Based Oxide Anode Materials for Sodium-Ion Batteries

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 20, 2024

Researchers are paying more attention to sodium-ion batteries (SIBs) because of their abundant supply sodium resources and affordable price. TiO

Language: Английский

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Strategies to enhance the catalytic activity of MoS2 in advanced oxidation processes: A review

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: unknown, P. 129841 - 129841

Published: Sept. 1, 2024

Language: Английский

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Electrospun MOF-derived N-doped mesoporous carbon fibers embedded with ultrafine vanadium oxide as an ultralong cycling stability for potassium ion storage

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1002, P. 175507 - 175507

Published: July 10, 2024

Language: Английский

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Diphosphorus Center Derived from Polyoxometalate for High-Energy Lithium Storage of MXene Nanosheets

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(15), P. 17935 - 17947

Published: July 26, 2024

Two-dimensional titanium carbide (Ti3C2Tx) is a promising lithium storage anode material owing to high conductivity and larger redox sites. However, Ti3C2Tx exhibits lower specific capacitance in an organic system due the passivation effect of surface terminals also suffers from restacking issues with long-term cycles. Herein, composed molybdenum–phosphorus compound nanosheets reported through thermal decomposition polyoxometalate. The derived molybdenum phosphide provides greater free space afford volume change facilitate lithium-ion transport. unique diphosphorus centers are favorable improving capacity electrochemical reaction. In addition, oxide abundant oxygen vacancies not only accelerates electronic ionic but more active optimized 0.1PMA@Ti3C2Tx composite delivers superior over 500 mAh g–1 at 30 mA maintains 155.6 750 after 400 capacitor based on presents wonderful energy density 153.95 Wh kg–1 higher power 4696.8 W kg–1. This work strategy for high-capacity MXene materials opens up idea application polyoxometalates storage.

Language: Английский

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Defect-engineered TiNO catalyst targeted to activate rate-determining step for highly efficient K-SeS2 batteries

Energy storage materials, Journal Year: 2024, Volume and Issue: 72, P. 103669 - 103669

Published: July 27, 2024

Language: Английский

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