Lithium-Induced Oxygen Vacancies in MnO₂@MXene for High-Performance Zinc–Air Batteries

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(10), P. 12781 - 12792

Published: Feb. 28, 2024

The traditional methods for creating oxygen vacancies in materials present several challenges and limitations, such as high preparation temperatures, limited vacancy generation, morphological destruction, which hinder the application of transition metal oxides field zinc–air batteries (ZABs). In order to address these we have introduced a pioneering lithium reduction strategy generating δ-MnO2@MXene composite materials. This stands out its simplicity implementation, applicability at room temperature, preservation material's structural integrity. research demonstrates that aqueous Ov-MnO2@MXene-5, with vacancies, exhibits an outstanding reaction (ORR) activity ORR half-wave potential reaching 0.787 V. DFT calculations demonstrated enhanced could be attributed adjustments electronic structure alterations adsorption bond lengths. These result from introduction turn promote electron transport catalytic activity. context batteries, cells Ov-MnO2@MXene-5 air cathode exhibit performance, featuring significantly improved maximum power density (198.3 mW cm–2) long-term cycling stability. Through innovative introducing this study has successfully electrochemical performance MnO2, overcoming limitations associated vacancies. Consequently, opens up new avenues directions nonprecious catalyst ZABs.

Language: Английский

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Arrays of Hierarchical Zincophilic Nanorods with Trapping‐and‐Leveling Deposition for Ultrastable Zn Metal Anodes

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(21)

Published: Feb. 29, 2024

Abstract Rechargeable aqueous zinc‐ion batteries (ZIBs) are highly promising for large‐scale sustainable energy storage applications, but there remain serious problems such as Zn dendrites and side reactions that limit the cycling performance. Herein, arrays of core–shell nanorods on Cu foam developed to stabilize zinc anodes, which have a hierarchical topological structure consisting N‐doped carbon layers embedded with zincophilic component 5 8 alloy (Cu @NC). It is found inner alloys minimized nucleation barriers act preferred sites, provide protective further accommodate high‐capacity plating Zn, leading trapping‐and‐leveling process deposition. The as‐obtained play an important role in homogenizing interfacial ionic fluxes reducing local current densities. As result, optimized @NC host yields superb Coulombic efficiency 99.7% over 5000 plating/stripping cycles, corresponding symmetric cell delivers ultralong dendrite‐free cycle life 7000 h low overpotential 16.5 mV at 1 mA cm −2 mAh . ZIB assembled anode V 2 O cathode exhibits long‐term charging/discharging cycles well, up 89.2% capacity retention after 10 000 cycles.

Language: Английский

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Dynamic heterostructure design of MnO₂ for high-performance aqueous zinc-ion batteries

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(10), P. 3629 - 3640

Published: Jan. 1, 2024

Bi 12.53 Mn 0.47 O 19.85 (BiO), acting as a metal ion reservoir, can supply 3+ to R-MnO 2 in situ form 4 10 (BMO) during cycling, resulting dynamic transformation from the BiO/MnO heterostructure BMO/MnO heterostructure.

Language: Английский

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Flexible electrochemical energy storage devices and related applications: recent progress and challenges

Chemical Science, Journal Year: 2024, Volume and Issue: 15(29), P. 11229 - 11266

Published: Jan. 1, 2024

This paper reviews advancements in flexible carbon-based and polymer gel materials for various types of energy storage systems, providing guidance future development next-generation wearable electronics.

Language: Английский

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In Situ Spontaneous Construction of Zinc Phosphate Coating Layer Toward Highly Reversible Zinc Metal Anodes

Small, Journal Year: 2024, Volume and Issue: 20(29)

Published: Feb. 13, 2024

Aqueous zinc ion batteries have received widespread attention due to their merits of high safety, theoretical specific capacity, low cost, and environmental benignity. Nevertheless, the irreversible issues Zn anode deriving from side reactions dendrite growth hindered its commercialization in large-scale energy storage systems. Herein, a phosphate tetrahydrate (Zn

Language: Английский

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Insights into the cycling stability of manganese-based zinc-ion batteries: from energy storage mechanisms to capacity fluctuation and optimization strategies

Chemical Science, Journal Year: 2024, Volume and Issue: 15(20), P. 7441 - 7473

Published: Jan. 1, 2024

Manganese-based materials are considered as one of the most promising cathodes in zinc-ion batteries (ZIBs) for large-scale energy storage applications owing to their cost-effectiveness, natural availability, low toxicity, multivalent states, high operation voltage, and satisfactory capacity. However, intricate mechanisms coupled with unsatisfactory cycling stability hinder commercial applications. Previous reviews have primarily focused on optimization strategies achieving capacity fast reaction kinetics, while overlooking fluctuation lacking a systematic discussion enhance these materials. Thus, this review, manganese-based ZIBs different structures systematically elucidated summarized. Next, ZIBs, including activation, degradation, dynamic evolution whole cycle calendar comprehensively analyzed. Finally, constructive based chemistry one-electron two-electron transfers durable performance proposed.

Language: Английский

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Hydroxylated Manganese Oxide Cathode for Stable Aqueous Zinc‐Ion Batteries

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

Published: May 1, 2024

Abstract Manganese (Mn) oxides are promising cathode materials for rechargeable aqueous Zn‐ion batteries. However, the Mn dissolution in weakly acidic electrolytes always hinders development of better Zn–Mn Herein, a hydroxylated manganese oxide material (H‐MnO 2 ) is fabricated using an electrochemical method stable batteries without relying on 2+ electrolyte additives. The partial hydroxylation leads to charge redistribution material, changing reaction thermodynamics and kinetics. Theoretical simulation suggests that promotes both Zn adsorption diffusion kinetics surface H‐MnO but weakens interaction between H + electrode. Therefore, ions can be more reactive with than ions. Experimental results show insertion mechanism dominates storage process 2, ‐induced effectively alleviated. Importantly, exhibits good cycling stability 95% capacity retention over 5000 cycles at current density 3.8 A g −1 ZnSO 4 electrolyte, outperforming state‐of‐the‐art batteries, even those findings provide new insights designing cathodes

Language: Английский

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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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Regulating the Gibbs Free Energy to Design Aqueous Battery‐Compatible Robust Host

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(31)

Published: May 21, 2024

Abstract Low‐cost, high‐voltage‐platform, and high‐capacity MnO 2 is the most promising cathode candidate for developing high‐energy‐density aqueous zinc‐ion batteries. However, Buckets effect of runaway phase transition irreversible dissolution restricts electrochemical performance . To address this issue, report presents a bottom‐up targeted assembly concept driven by Gibbs free energy design robust Ni‐MnO 2‐x F x host via Ni 2+ pre‐intercalation coupled with fluorine doping. The regulated coordination interlayer reinforcement interfacial defect repair, which prevents “layer‐to‐spinel” inhibits during long‐term cycling. As expected, provides superior H + /Zn storage across wide temperature range. A capacity 180.4 mAh g −1 retained after 1000 cycles at , high specific 293.9 250 50 °C 144.5 3000 0 0.5 This work new insights into stable battery‐compatible hosts batteries as well other battery chemistries.

Language: Английский

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Boosting Charge Carrier Transport by Layer‐Stacked Mn_xV₂O₆/V₂C Heterostructures for Wide‐Temperature Zinc‐Ion Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(37)

Published: March 26, 2024

Abstract Vanadium‐based materials are considered promising cathodes for high‐energy‐density zinc‐ion batteries (ZIBs) owing to their open skeleton structure and multielectron redox reactions. However, most vanadium‐based have low intrinsic conductivities sluggish reaction kinetics, resulting in poor cycling properties. Herein, a layer‐stacked Mn x V 2 O 6 +V CT (MVO+V C) heterostructure cathode with high capacity superior cyclic stability based on an electrostatic self‐assembly strategy is proposed. The abundant heterointerfaces between MVO C dramatically enhanced the conductivity of composites. Moreover, generation built‐in electric fields at MVO/V heterointerface reduced migration energy barrier Zn 2+ , accelerated charge carrier transport, kinetics cathode. In addition, abundance nano‐channels heterostructures facilitates rapid electrolyte transport Therefore, MVO+V showed 389.4 mAh g −1 after 590 cycles 0.5 A 290.2 6000 5 demonstrating its stability. particular, assembled exhibited remarkable electrochemical performance −20–40 °C, revealing excellent wide‐temperature adaptability. This work offers important insights into design long‐lifespan ZIBs.

Language: Английский

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