Morphology regulation and vacancy engineering for vanadium oxide cathodes via tungsten doping towards advanced zinc-ion batteries

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 696, P. 137888 - 137888

Published: May 15, 2025

Recently, vanadium oxide of V6O13 has emerged as a promising cathode material for aqueous zinc-ion batteries (AZIBs) due to its high theoretical specific capacity, abundant reserves, and the multiple adjustable oxidation states vanadium. However, poor electronic conductivity severe structural collapse during cycling limit practical application. Herein, W6+-doped nanobelt was synthesized via one-step solvothermal method. W6+ doping regulates morphology from irregular nanosheets into nanobelts, increasing surface area improving contact with electrolyte. Furthermore, W6+-doping induces more oxygen vacancies activated active sites, facilitating rapid diffusion Zn2+. As result, WVO delivers capacity 472.6 mAh g-1 at 0.5 A 266.4 10 g-1, outstanding retention 82.4 % after 3,000 cycles g-1. This work provides valuable insights design advanced cathodes.

Language: Английский

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Eco-friendly hydroxyapatite and emerging MXenes for uranium adsorptive uptake

Environmental Science Nano, Journal Year: 2024, Volume and Issue: 11(7), P. 2744 - 2770

Published: Jan. 1, 2024

Hydroxyapatite and MXenes are potentially ideal adsorbents for uranium as a nuclear contaminant possessing radioactivity chemical toxicity.

Language: Английский

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Improved Cycling Stability of Ni-Rich Cathode Material by In Situ Introduced TM-B-O Amorphous Surface Structure

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(12), P. 15505 - 15513

Published: March 14, 2024

Current research has found the amorphous/crystal interface some unexpected electrochemical behaviors. This work designed a surface modification strategy using NaBH4 to induce in situ conversion of structure Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) into TM-B-O amorphous layer. Oxidizing from transition metals (TM) with high valence and reductive BH4– weak polar medium ethanol results an easy redox reacton. A is formed on NCM811 surface. The action reactive wetting ensures complete uniform evolution crystals. coverage protects outer crystal heterogeneous impedance between modified layer bulk reduced. More importantly, this through enhances link at its own structural stability. (TB2@NCM) treated 1 wt % shows excellent performance, especially cyclic At cutoff voltage 4.5 V, capacity retention was 72.5% C after 500 cycles. electrode achieves 173.7 mAh·g–1 10 C. creates modifying potential application prospect due simple technology low-cost raw material under mild operating conditions.

Language: Английский

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Enhancement of De‐Solvation Kinetics on V₅O₁₂•6H₂O Cathode Through a Bi‐Functional Modification Layer for Low‐Temperature Zinc‐Ion Batteries

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

Published: Dec. 10, 2024

Abstract Zinc‐ion batteries (ZIBs) show great promise for next‐generation energy storage, but their performance at low temperatures is severely hindered by sluggish desolvation kinetics cathode‐electrolyte interface. To address this limitation, a zincophilic‐hydrophobic poly(3,4‐ethylenedioxythiophene) (PEDOT) modified layer proposed on V 5 O 12 •6H 2 cathode. Ab initio molecular dynamics simulations indicate that modification strategy promotes Zn ⁺ adsorption and reduces the free dissociating hydrated 2+ to form interface, across temperature of 280 240 K. As result, PEDOT‐modified cathode exhibits significantly improved diffusion kinetics, delivering superior rate with remarkable capacity 226.5 mAh g⁻¹ 40 A g⁻¹. Notably, even −30 °C, maintains high 268.3 mA 0.2 robust retention (92.4%) over 1,000 cycles 1 This approach markedly improves low‐temperature operational efficiency, highlighting potential interface engineering advance zinc‐ion in cold environments.

Language: Английский

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Brick-cement system inspired fabrication of Ti3C2 MXene nanosheet reinforced high-performance of chitosan/gelatin/PVA composite films

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 283, P. 137839 - 137839

Published: Nov. 18, 2024

Language: Английский

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