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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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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Capacity compensation via redox transition enables MnVBO4 to be a long-life cathode for aqueous zinc-ion batteries

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 631, P. 236184 - 236184

Published: Jan. 13, 2025

Language: Английский

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A Near‐Single‐Ion Conducting Protective Layer for Dendrite‐Free Zinc Metal Anodes

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

Published: Jan. 26, 2025

Abstract The instability of zinc metal anodes, including dendrite formation and corrosion, limits their application in aqueous zinc‐ion batteries (AZIBs). Here, a near‐single conducting (NSIC) protective layer that enables dendrite‐free Zn anodes by integrating 2 ⁺‐conducting polymer matrices with counter‐anion trapping agents is presented. Sulfonic acid groups, covalently bonded to polymeric backbones enhance ⁺ ion mobility while counter‐anions are immobilized amine‐functionalized metal‐organic frameworks embedded within the layer. This synergistic combination near single transport ( t = 0.91). NSIC extends sand's time promotes uniform deposition along (002) orientation, preventing formation. Consequently, full cells thin Zn@NSIC (14 µm) exhibit stable cycling performance over 5000 cycles at 5 A g⁻¹, low negative‐to‐positive areal capacity (NP) ratio 3.3 depth discharge exceeding 30%. Furthermore, also adapted for enlarged (80 cm ) large‐sized cells, delivering operation ≈300 mAh 1 g⁻¹. These results offer valuable insights into control layers, advancing development practical AZIBs high anode reversibility.

Language: Английский

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Dual-Engineering of Vooh for Enhanced Phase Transition Kinetics and Stability in Aqueous Zinc Ion Batteries

Published: Jan. 1, 2025

Language: Английский

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Representative By‐Products of Aqueous Zinc‐Vanadium Batteries: Origins, Roles, Strategies, and Prospects

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

Published: March 3, 2025

Abstract Aqueous zinc‐ion batteries (AZIBs) are of interest in next‐generation energy storage applications owing to their safety, environmental friendliness, and cost‐effectiveness. Vanadium‐based oxides promising cathodes for AZIBs due appropriate structure multielectron redox processes. Although hundreds studies devoted understanding the mechanisms developing high‐performance vanadium‐based cathodes, many puzzles controversies still exist, especially regarding two representative by‐products, basic zinc salt (BZS) pyrovanadate (ZVO). BZS ZVO often observed on cathode anode during cycling, directly affecting battery performance. However, by‐products’ controversial unclassified insights unclear have severely limited Zn‐V batteries’ progress. Therefore, this review aims exhaustively elucidate “past present” by‐products following a logical sequence origin, role, inhibition strategy, prospect. Notably, incorporates substantial comments understandings long‐neglected issues related BZS‐related ZVO‐related dissolution mechanisms. This is expected provide scientific guidelines future optimization commercialization batteries.

Language: Английский

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Superior Cycling Stability in Zinc‐Ion Batteries with Ca²⁺‐Induced Cathode‐Electrolyte Interface and Phytic Acid: Experimental Validation of Theoretical Predictions

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

Published: March 24, 2025

This study investigates the impact of Ca2+ and phytic acid (PA) pre-insertion on performance vanadium oxide (V6O13) as a cathode material for aqueous zinc-ion batteries. Ab initio molecular dynamics (AIMD) simulations reveal that diffusion coefficient Ca2⁺ is higher than Zn2+, leading to preferential extraction Ca2⁺. The extracted readily forms dense cathode-electrolyte interphase (CEI) with SO₄2 - electrode surface, effectively mitigating dissolution. Furthermore, density functional theory (DFT) calculations indicate incorporation lowers energy barrier Zn2⁺, facilitating its diffusion. Additionally, PA insertion stabilizes interlayer spacing V6O13, strong chelating ability structure by preventing collapse during cycling. Experimental validation through one-step solvothermal method confirms these theoretical predictions. CaVO-PA composite exhibits excellent cycling stability, capacity retention rate increasing from 60% 102% after 3000 cycles at 10 A g-¹. Even 20 g-¹, it delivers specific 170.2 mAh g-¹ stable Coulombic efficiency. After 000 cycles, shows no significant degradation, demonstrating superior stability high current tolerance, thereby confirming effectiveness CEI in enhancing electrochemical performance.

Language: Английский

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Integrated Network Cathodes by In Situ Phase Transition Break Diffusion Limitation for Zinc Ion Battery

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

Published: April 1, 2025

The cathode materials set the limitation of aqueous zinc ion batteries (AZIBs) in capacity and restrict their development. Vanadium-based show unsatisfactory conductivity strong interactions with Zn2+ as well a narrow voltage window. Herein, an integrated network structure is obtained by modulating window to phase transition from VO2 HXV2O5. This has multiple advantages: low crystallinity abundant active sites; good electrolyte wetting; two-electron transfer for high specific capacity. AZIBs exhibit impressive rate performance (545 mAh g-1 at 0.1 A 185 20 g-1) cycling (179 after 15 000 cycles g-1), stable operation even -20 °C (391 1 g-1, 97 10 g-1). have power density energy based on mass material (405 Wh kg-1 74 W 102 11 127 kg-1). pouch-type cell can run over 500 h, maximum 45.5 kg-1. mechanism storage are identified, which conducive promoting development cathodes AZIBs.

Language: Английский

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Zinc Ion Transport Kinetics in Zinc‐based Batteries and Its Regulation Strategy

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

Published: April 2, 2025

Abstract Rechargeable zinc‐ion batteries (ZIBs) have gained significant attention as potential next‐generation energy storage systems, owing to their inherent safety, environmental benignity, and cost‐effectiveness. However, the substantial electrostatic repulsion of Zn ion results in a sluggish kinetics for its insertion into cathode material. Meanwhile, formation hydrated ionic groups with increased mass volume aqueous electrolyte further hampers transport ability zinc ions, significantly impacting overall electrochemical performance (including capacity, density, rate‐capability, cyclability) batteries. This review systematically summarized recent progress regulation strategy kinetics. The as‐reported mechanisms are introduced ZIBs (Zn 2+ insertion/extraction mechanism, H + or 2 O/ co‐insertion/extraction conversion reaction coordination mechanism). Then, material design fast including soft lattice construction, doping effects, defect introduction, morphology control, interface is summarized. Finally, it concluded future research directions, such high‐entropy design, multi‐scale simulation, machine study, providing roadmap developing high‐performance at ultralow operation temperatures.

Language: Английский

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Dual-engineering of VOOH for enhanced phase transition kinetics and stability in aqueous zinc ion batteries

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162882 - 162882

Published: April 1, 2025

Language: Английский

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