Establishing Pinhole Deposition Mode of Zn via Scalable Monolayer Graphene Film

Advanced Materials, Год журнала: 2024, Номер 36(19)

Опубликована: Фев. 7, 2024

Abstract The uneven texture evolution of Zn during electrodeposition would adversely impact upon the lifespan aqueous metal batteries. To address this issue, tremendous endeavors are made to induce Zn(002) orientational deposition employing graphene and its derivatives. Nevertheless, effect prototype film over behavior has garnered less attention. Here, it is attempted solve such a puzzle via utilizing transferred high‐quality with controllable layer numbers in scalable manner on foil. multilayer fails facilitate epitaxial deposition, whereas monolayer slight breakages steers unique pinhole mode. In‐depth electrochemical measurements theoretical simulations discover that not only acts as an armor inhibit side reactions but also serves buffer homogenize initial nucleation decrease migration barrier, accordingly enabling smooth closely stacked polycrystalline domains. As result, both assembled symmetric full cells manage deliver satisfactory performances. This study proposes concept “pinhole deposition” dictate broadens horizons graphene‐modified anodes.

Язык: Английский

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A Chemical Sewing Enabled All‐In‐One Control Interface for Robust Zinc Metal Anodes

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Апрель 25, 2024

Abstract Developing artificial protective layers is an effective strategy to address the issue of dendrites for aqueous Zn‐metal batteries (ZMBS). However, drawbacks such as rough microscopic morphology, excessive thickness, and single functionality remain, limiting attainment a stable zinc anode. Herein, novel multifunctional organic–inorganic hybrid layer produced by splicing inorganic fragments onto organic materials in situ using chemical sewing. The well‐compatible also retains function materials, which not only inhibits dendrite production but alleviates Zn corrosion. Si─OH bond zincophilic group enables planar deposition while forming hydrogen bonds with water, suppressing water activity near anode reducing evolution reaction. As expected, Zn||Zn symmetric cell provides high cycling stability more than 1960 h at 1 mA cm −2 , about 28 times higher that assembled without layer. More importantly, Zn||V 2 O 5 full ultra‐long lifetime has been achieved This work potential viable path achieve long‐lived ZMBS.

Язык: Английский

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Ultrathin Reed Membranes: Nature's Intimate Ion‐Regulation Skins Safeguarding Zinc Metal Anodes in Aqueous Batteries

Advanced Energy Materials, Год журнала: 2024, Номер 14(13)

Опубликована: Фев. 21, 2024

Abstract The practical realization of aqueous zinc‐ion batteries relies crucially on effective interphases governing Zn electrodeposition chemistry. In this study, an innovative solution by introducing ultrathin (≈2 µm) biomass membrane as intimate artificial interface, functioning nature's ion‐regulation skin to protect zinc metal anodes is proposed. Capitalizing the inherent properties natural reed membrane, including multiscale ion transport tunnels, abundant ─OH groups, and remarkable mechanical integrity, demonstrates efficacy in regulating uniform rapid 2+ transport, promoting desolvation, (002) plane electrodeposition. Importantly, a unique situ electrochemical Zn─O bond formation mechanism between electrode upon cycling elucidated, resulting robustly adhered interface covering anode surface, ultimately ensuring dendrite‐free highly reversible anodes. Consequently, approach achieves prolonged cycle life for over 1450 h at 3 mA cm −2 /1.5 mAh symmetric Zn//Zn cells. Moreover, exceptional cyclic performance (88.95%, 4000 cycles) obtained active carbon‐based cells with mass loading 5.8 mg . offers cost‐effective environmentally friendly strategy achieving stable batteries.

Язык: Английский

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Superfast Zincophilic Ion Conductor Enables Rapid Interfacial Desolvation Kinetics for Low‐Temperature Zinc Metal Batteries

Advanced Science, Год журнала: 2024, Номер 11(28)

Опубликована: Май 9, 2024

Abstract Low‐temperature rechargeable aqueous zinc metal batteries (AZMBs) as highly promising candidates for energy storage are largely hindered by huge desolvation barriers and depressive Zn 2+ migration kinetics. In this work, a superfast zincophilic ion conductor of layered silicate nanosheet (LZS) is constructed on metallic surface, an artificial layer diffusion accelerator. The experimental simulation results reveal the ability structure LZS not only promote kinetics [Zn(H 2 O) 6 ] but also accelerate transport across anode/electrolyte interface, guiding uniform deposition. Benefiting from these features, LZS‐modified anodes showcase long‐time stability (over 3300 h) high Coulombic efficiency with ≈99.8% at mA cm −2 , respectively. Even reducing environment temperature down to 0 °C, ultralong cycling up 3600 h distinguished rate performance realized. Consequently, assembled Zn@LZS//V O 5‐x full cells deliver superior cyclic (344.5 mAh g −1 after 200 cycles 1 A ) capability (285.3 10 together low self‐discharge rate, highlighting bright future low‐temperature AZMBs.

Язык: Английский

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Polymer gels for aqueous metal batteries

Progress in Materials Science, Год журнала: 2025, Номер unknown, С. 101426 - 101426

Опубликована: Янв. 1, 2025

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