Tunnel‐Oriented VO₂ (B) Cathode for High‐Rate Aqueous Zinc‐Ion Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: March 16, 2024

Tunnel-type vanadium oxides are promising cathodes for aqueous zinc ion batteries. However, unlike layer-type with adjustable layer distances, enhancing ion-transport kinetics in tunnels characterized by fixed sizes poses a considerable challenge. This study highlights that the macroscopic arrangement of electrode crucially determines tunnel orientation, thereby influencing transport. By changing material morphology, orientation can be optimized to facilitate rapid diffusion. In proof-of-concept demonstration, it is revealed (00l) facets-dominated VO

Language: Английский

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Lattice Strain with Stabilized Oxygen Vacancies Boosts Ceria for Robust Alkaline Hydrogen Evolution Outperforming Benchmark Pt

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 12, 2024

Abstract Earth‐abundant metal oxides are usually considered as stable but catalytically inert toward hydrogen evolution reaction (HER) due to their unfavorable intermediate adsorption performance. Herein, a heavy rare earth (Y) and transition (Co) dual‐doping induced lattice strain oxygen vacancy stabilization strategy is proposed boost CeO 2 robust alkaline HER. The compression increased (O v ) concentration in synergistically improve the water dissociation on O sites sequential at activated ‐neighboring sites, leading significantly enhanced HER kinetics. Meanwhile, Y doping offers effect by its stronger Y─O bonding over Ce─O, which endows catalyst with excellent stability. Y,Co‐CeO electrocatalyst exhibits an ultra‐low overpotential (27 mV 10 mA cm −2 Tafel slope (48 dec −1 ), outperforming benchmark Pt electrocatalyst. Moreover, anion exchange membrane electrolyzer incorporated achieves stability of 500 h under 600 . This synergistic sheds new light rational development efficient oxide‐based electrocatalysts.

Language: Английский

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Molecular Engineering Enables Hydrogel Electrolyte with Ionic Hopping Migration and Self‐Healability toward Dendrite‐Free Zinc‐Metal Anodes

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(19)

Published: Jan. 30, 2024

Abstract Hydrogel electrolytes (HEs), characterized by intrinsic safety, mechanical stability, and biocompatibility, can promote the development of flexible aqueous zinc‐ion batteries (FAZIBs). However, current FAZIB technology is severely restricted uncontrollable dendrite growth arising from undesirable reactions between HEs with sluggish ionic conductivity Zn metal. To overcome this challenge, work proposes a molecular engineering strategy, which involves introduction oxygen‐rich poly(urea‐urethane) (OR‐PUU) into polyacrylamide (PAM)‐based HEs. The OR‐PUU/PAM facilitate rapid ion transfer through their hopping migration mechanism, resulting in uniform orderly 2+ deposition. abundant polar groups on OR‐PUU molecules break inherent H‐bond network, tune solvation structure hydrated , inhibit occurrence side reactions. Moreover, interaction hierarchical H‐bonds endows them self‐healability, enabling situ repair cracks induced plating/stripping. Consequently, symmetric cells incorporating novel exhibit long cycling life 2000 h. Zn–MnO 2 battery displays low capacity decay rate 0.009% over cycles at mA g −1 . Overall, provides valuable insights to realization dendrite‐free Zn‐metal anodes

Language: Английский

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Unlocking the Crucial Role of Oxygen Vacancies on the Low‐Temperature Li‐Ion Storage

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

Published: Jan. 7, 2025

Abstract Designing crystal structures that enable fast Li‐ion transport is essential for achieving high performance in oxide electrodes low‐temperature lithium‐ion batteries (LT‐LIBs), especially micron‐scale particles. The introduction of point defects considered to be effective accelerating local at room temperature, but due the discontinuity defects, enhancement low temperatures remains verified. Besides, understanding defect impact quite limited. In this study, a vanadium pentoxide (V 2 O 5 ) cathode with abundant oxygen vacancies bulk phase successfully synthesized. Such structure tends form continuous and channels, facilitating deep lithiation ultralow exceptional rate capability impressive capacitance retention (74% −40 °C 54% −50 °C). Remarkably, an empirical relationship between storage oxides uncovered. Specifically, degree exhibits two distinct trends depending on temperature: linear increase response vacancy concentration above °C, exponential below threshold. insights gained here highlight crucial role concentrations temperatures, providing direction tackling critical challenges battery technologies.

Language: Английский

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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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Synergistic Effect of 3D Elastomer/Super‐Ionic Conductor Hybrid Fiber Networks Enables Zinc Anode Protection for Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(22)

Published: Feb. 5, 2024

Abstract Aqueous zinc‐ion batteries (AZIBs) with the merits of superior security, natural abundance, and inexpensive Zn hold great promises for next‐generation energy storage. Nevertheless, instabilities anodes arising from unsatisfactory dendrite growth parasitic reactions have seriously restricted their practical application. Herein, an interfacial protection engineering approach is proposed stabilizing anode via in ‐ situ constructing 3D hybrid fiber networks within high elastic polyether‐type polyurethane (TPEU) super‐ionic conductor NaTi 2 (PO 4 ) 3 (NTP). This NTP@TPEU framework demonstrates synergistic effects enhancing 2+ immigration kinetics improving desolvation process. Subsequently, such a protected interface induces highly reversible (002) deposition/stripping dendrites‐free feature. Moreover, NTP@TPEU/Zn displays ultralong lifespan over 2000 cycles average Coulombic efficiency (CE) 99.5% half‐cell configuration. To highlight, full battery matched Ca‐doped VO on carbon cloth cathode acquires enhanced CE as 99.8% delivers good cycling stability capacity retention 81.6% at A g −1 3000 cycles. These excellent outcomes provide distinctive perspective designing stable zinc application AZIBs.

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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Regulating Zn²⁺ Migration‐Diffusion Behavior by Spontaneous Cascade Optimization Strategy for Long‐Life and Low N/P Ratio Zinc Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(41)

Published: May 31, 2024

Parasitic side reactions and dendrite growth on zinc anodes are formidable issues causing limited lifetime of aqueous ion batteries (ZIBs). Herein, a spontaneous cascade optimization strategy is first proposed to regulate Zn

Language: Английский

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Unveiling Intercalation Chemistry via Interference‐Free Characterization Toward Advanced Aqueous Zinc/Vanadium Pentoxide Batteries

Advanced Science, Journal Year: 2024, Volume and Issue: 11(40)

Published: Aug. 29, 2024

Abstract Aqueous Zn/V 2 O 5 batteries are featured for high safety, low cost, and environmental compatibility. However, complex electrode components in real impede the fundamental understanding of phase transition processes intercalation chemistry. Here, model based on V film electrodes which show similar electrochemical behaviors as ones built. Advanced surface science characterizations allow to identify trajectories Zn 2+ , H O, + during processes. Protons serve vanguard intercalated species, facilitating subsequent O. The increase capacity activation process is mainly due from more active ·nH structure caused by partial irreversible deintercalation rather than sites induced grain refinement materials. Eventually, accumulation species within oxide results formation inactive (Zn 3 (OH) 7 ·2H O) structure. established chemistry helps design high‐performance

Language: Английский

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Superhydrophobic and Highly Flexible Artificial Solid Electrolyte Interphase Inspired by Lotus Effect Toward Highly Stable Zn Anode

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

Published: Aug. 6, 2024

Abstract Due to their cost‐effectiveness, high safety, and environmental friendliness, aqueous zinc‐ion batteries (AZIBs) are among the most promising technologies for next‐generation energy storage systems. Nonetheless, dendrite growth, hydrogen evolution, corrosion at zinc (Zn) anode severely hinder practical application. In this study, a combination of molecular self‐assembly engineering, squeegee coating, air spraying process is employed create superhydrophobic highly flexible artificial solid‐electrolyte‐interface layer on Zn (denoted as SFM/Zn). Self‐assembled monolayer triethoxy‐3‐aminopropylsilane optimizes 2+ migration kinetics. The interface, formed by polydimethylsiloxane (PDMS) trimethoxy(octadecyl)silane (OTS)‐modified nanosilicon dioxide particles, inhibits water‐related side reactions. Furthermore, PDMS serves dynamic adaptive interface anode, effectively alleviating “tip effect”. Consequently, SFM/Zn||SFM/Zn symmetrical cells enable reversible stable plating/stripping both ultralow current density (0.2 mA cm −2 ) ultrahigh (45 ). assembled Zn‐vanadium (SFM/Zn||NH 4 V O 10 cell deliver average Coulombic efficiency (nearly 100%) ultralong cycling stability (135.5 mAh g −1 after 500 cycles 5 A 173.2 1000 2 This innovative three‐layered strategy sheds new light designing durable high‐performance AZIBs.

Language: Английский

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