Metal-organic framework assisted design of ZnVOx cathode for aqueous zinc batteries at extreme work condition

Nano Energy, Journal Year: 2024, Volume and Issue: 127, P. 109809 - 109809

Published: May 28, 2024

Language: Английский

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Toward Simultaneous Dense Zinc Deposition and Broken Side‐Reaction Loops in the Zn//V₂O₅ System

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(11)

Published: Jan. 8, 2024

Abstract The Zn//V 2 O 5 system not only faces the incontrollable growth of zinc (Zn) dendrites, but also withstands cross‐talk effect by‐products produced from cathode side to Zn anode, inducing interelectrode talk and aggravating battery failure. To tackle these issues, we construct a rapid 2+ ‐conducting hydrogel electrolyte (R‐ZSO) achieve deposition modulation reaction inhibition in full cells. polymer matrix BN exhibit robust anchoring on SO 4 2− , accelerating migration enabling dense behavior. Therefore, Zn//Zn symmetric cells based R‐ZSO can operate stably for more than 1500 h, which is six times higher that employing blank electrolyte. More importantly, effectively decouples effects, thus breaking infinite loop reactions. As result, using this modified demonstrate stable operation over 1,000 cycles, with capacity loss rate 0.028 % per cycle. Our study provides promising gel chemistry, offers valuable guide construction high‐performance multifunctional aqueous Zn‐ion batteries.

Language: Английский

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NiMn2O4/CoS nanostructure electrode material for flexible asymmetric supercapacitors

Electrochimica Acta, Journal Year: 2024, Volume and Issue: 491, P. 144329 - 144329

Published: April 23, 2024

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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Regulating the Interfacial Charge Density by Constructing a Novel Zn Anode‐Electrolyte Interface for Highly Reversible Zn Anode

Chemistry - A European Journal, Journal Year: 2023, Volume and Issue: 30(3)

Published: Nov. 1, 2023

Abstract Aqueous zinc‐ion batteries (AZIBs) have attracted considerable attention. However, due to the uneven distribution of charge density at Zn anode‐electrolyte interface, severe dendrites and corrosion are generated during cycling. In this work, a facile scalable strategy address above‐mentioned issues has been proposed through regulating interface. As proof concept, amidinothiourea (ATU) with abundant lone‐pair electrons is employed as an interfacial modifier for The uniform increased on interface obtained. Moreover, unique Zn‐bond constructed between N atoms 2+ well hydrogen bonds formed among ATU Ac − anion/active H 2 O, which promote migration desolvation behavior Accordingly, trace concentration 0.01 mg mL −1 ATU, these features endow anode long cycling life (more than 800 h), high average Columbic efficiency (99.52 %) Zn||Cu batteries. When pairing I cathode, improved ability (5000 cycles) capacity retention 77.9 % achieved. fundamental understanding regulation can facilitate development AZIBs.

Language: Английский

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High-Performance and Chemically Self-Charging Flexible Aqueous Zinc-Ion Batteries Based on Organic Cathodes with Zn²⁺ and H⁺ Storage

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(8), P. 3153 - 3166

Published: Feb. 16, 2024

Chemically self-charging aqueous zinc-ion batteries (AZIBs) via air oxidation will provide new opportunities for future wearable electronic devices. Herein, we display two high-performance flexible AZIBs based on a trifluorohexaazatrinaphthylene (TFHATN)/trichlorohexaazatrinaphthylene (TCLHATN) cathode, which can be recharged without using an external power supply. The Zn//TFHATN/Zn//TCLHATN battery presents good mechanical flexibility and high volumetric energy density of 9.2/10.7 mWh cm–3. air-recharging capability originates from spontaneous redox reaction between the discharged TFHATN/TCLHATN cathode O2 air. After exposure to 15 h, around 1.2 V, exhibits discharge capacity, rate performance, higher cycle stability (8 cycles), works well in chemical and/or galvanostatic charging mixed modes, displaying reusability. This work provides strategy developing high-performance, air-rechargeable AZIBs.

Language: Английский

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K_0.39V₂O₅·0.52H₂O Nanostructures with Oxygen Vacancies as Cathodes for Aqueous Zinc-Ion Batteries

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Aqueous zinc-ion batteries (AZIBs) are considered a promising option for large-scale energy storage because of their low cost and high safety. However, the lack suitable cathode materials has limited development. Vanadium-based oxides have been widely studied due to layered crystal structures theoretical specific capacities. Nevertheless, they prone vanadium dissolution cycle life during cycling. Pre-embedding K+ in V2O5 by hydrothermal method increases layer spacing stabilizes structure. Oxygen vacancies introduced provide more sites Zn storage. The results show that K0.39V2O5·0.52H2O nanostructures exhibit stable cycling performance. capacity is 552 mAh g–1 at 0.1 A g–1, retention 90% 11,000 cycles 10 g–1. When electrolyte changed from Zn(CF3SO3)2 ZnSO4, rate 98% after 200 1 nearly 100% 2400 This study highlights potential ion doping oxygen defects modifying electrodes provides guide exploring working mechanisms aqueous batteries.

Language: Английский

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Chitosan-induced NH₄V₄O₁₀ hierarchical hybrids as high-capacity cathode for aqueous zinc ion batteries

RSC Advances, Journal Year: 2024, Volume and Issue: 14(14), P. 9594 - 9601

Published: Jan. 1, 2024

Aqueous zinc ion batteries (AZIBs) have been widely investigated due to their characteristics of convenient operation and intrinsic safety.

Language: Английский

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Unraveling the Anionic Redox Chemistry in Aqueous Zinc‐MnO2 Batteries

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(47)

Published: Aug. 12, 2024

Abstract Activating anionic redox reaction (ARR) has attracted a great interest in Li/Na‐ion batteries owing to the fascinating extra‐capacity at high operating voltages. However, ARR rarely been reported aqueous zinc‐ion (AZIBs) and its possibility popular MnO 2 ‐based cathodes not explored. Herein, novel manganese deficient micro‐nano spheres with interlayer “Ca 2+ ‐pillars” (CaMnO‐140) are prepared via low‐temperature (140 °C) hydrothermal method, where Mn vacancies can trigger by creating non‐bonding O 2p states, pre‐intercalated Ca reinforce layered structure suppress lattice oxygen release forming Ca−O configurations. The tailored CaMnO‐140 cathode demonstrates an unprecedentedly rate capability (485.4 mAh g −1 0.1 A 154.5 10 ) marvelous long‐term cycling durability (90.6 % capacity retention over 5000 cycles) AZIBs. reversible chemistry accompanied CF 3 SO − (from electrolyte) uptake/release, H + /Zn co‐insertion/extraction, elucidated advanced synchrotron characterizations theoretical computations. Finally, pouch‐type CaMnO‐140//Zn manifest bright application prospects energy, long life, wide‐temperature adaptability, safety. This study provides new perspectives for developing high‐energy AZIBs initiating chemistry.

Language: Английский

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