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

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

Published: March 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.

Language: Английский

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Revitalizing inert carbon pores with benzoquinone for high-performance flexible zinc-ion capacitors

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The inert carbon pores are revitalized by incorporating benzoquinone, resulting in flexible zinc-ion capacitors with an energy density of 218 W h kg −1 .

Language: Английский

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Zn-ion capacitors based on solutions of different electrolytes

Electrochimica Acta, Journal Year: 2025, Volume and Issue: unknown, P. 145916 - 145916

Published: Feb. 1, 2025

Language: Английский

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Building Powerful Zinc‐Ion Hybrid Capacitors by an Energy Drink‐Inspired Strategy

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

Published: March 3, 2025

Abstract Numerous modification strategies have been proposed to enhance the performance of Zn anode and carbon cathode in aqueous zinc‐ion hybrid capacitors (ZIHCs). However, one efficient strategy modify both is still lacking. Herein, taurine (Tau), key ingredient energy drinks, used as electrolyte additive precursor for ZIHCs simultaneously. As additive, Tau achieves preferential growth (002) plane by preferentially adsorbing on other crystal planes. Moreover, accelerates 2+ transference kinetics regulating solvation structure constructs a functional solid interphase layer, enabling suppressed hydrogen evolution, inhibited corrosion reaction, dendrite‐free deposition. The Zn//Zn cells using Tau‐modified·ZnSO 4 (Tau‐ZSO) can stably work 1000 h at 76.95% depth discharge room temperature 5200 −10 °C. Meanwhile, taurine‐derived (Tau‐C) exhibits N, S heteroatom doping, hierarchical porous structure, high specific surface area, which contributes capacity. By Tau‐C cathode, limited (10 µm), Tau‐ZSO electrolyte, assembled demonstrate reduced polarization capacities (119.4 mA g −1 under 3 A 80.0 1 °C) with density 101.1 Wh kg long lifetime (operating over 2000 cycles).

Language: Английский

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Tuning the pore structure of N/O co-doped porous carbon nanosheets for high-performance supercapacitors and zinc-ion capacitors

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 118, P. 35 - 45

Published: March 17, 2025

Language: Английский

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Sodium bicarbonate-assisted construction of honeycomb-like porous carbon materials with interconnected cavities for enhanced zinc ion storage

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: unknown, P. 136983 - 136983

Published: April 1, 2025

Language: Английский

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Raspberry-Like Hollow Carbon Spheres: A Promising Electrode Material for High-Performance Zinc-Ion Hybrid Supercapacitors

Synthetic Metals, Journal Year: 2024, Volume and Issue: unknown, P. 117821 - 117821

Published: Dec. 1, 2024

Language: Английский

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