Guiding Zn Uniform Deposition with Polymer Additives for Long‐lasting and Highly Utilized Zn Metal Anodes

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(51)

Опубликована: Ноя. 6, 2023

The parasitic side reaction on Zn anode is the key issue which hinders development of aqueous Zn-based energy storage systems power-grid applications. Here, a polymer additive (PMCNA) engineered by copolymerizing 2-methacryloyloxyethyl phosphorylcholine (MPC) and N-acryloyl glycinamide (NAGA) was employed to regulate deposition environment for satisfying inhibition performance during long-term cycling with high utilization. PMCNA can preferentially adsorb metal surface form uniform protective layer effective water molecule repelling resistance. In addition, guide nucleation along 002 plane further dendrite suppression. Consequently, enable Zn//Zn battery an ultrahigh depth discharge (DOD) 90.0 % over 420 h, Zn//active carbon (AC) capacitor long lifespan, Zn//PANI utilization 51.3 at low N/P ratio 2.6.

Язык: Английский

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Trade-off between Zincophilicity and Zincophobicity: Toward Stable Zn-Based Aqueous Batteries

JACS Au, Год журнала: 2023, Номер 3(8), С. 2107 - 2116

Опубликована: Июль 25, 2023

Zn-based aqueous batteries (ZABs) hold great promise for large-scale energy storage applications due to the merits of intrinsic safety and low cost. Nevertheless, thorny issues metallic Zn anodes, including dendrite growth parasitic side reactions, have severely limited application ZABs. Despite encouraging improvements stabilizing anodes through surface modification, electrolyte optimization, structural design, fundamentally addressing inherent thermodynamics kinetics obstacles remains crucial in realizing reliable ZABs with ultrahigh efficiency, capacity, cyclability. The target this perspective is elucidate prominent status metal anode electrochemistry first from zincophilicity zincophobicity. Recent progress critically appraised key issues, special emphasis on trade-off between zincophilic zincophobic electrochemistry. Challenges prospects further exploration a are presented, which expected boost in-depth research practical advanced

Язык: Английский

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Tailoring desolvation strategies for aqueous zinc-ion batteries

Energy & Environmental Science, Год журнала: 2024, Номер 17(14), С. 4819 - 4846

Опубликована: Янв. 1, 2024

This review provides a comprehensive overview detailing the advancements in desolvation strategies pertaining to aqueous zinc-ion batteries (AZIBs) performances, addressing applications and working mechanisms of AZIBs.

Язык: Английский

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Texture Exposure of Unconventional (101)_Zn Facet: Enabling Dendrite‐Free Zn Deposition on Metallic Zinc Anodes

Advanced Energy Materials, Год журнала: 2024, Номер 14(16)

Опубликована: Фев. 15, 2024

Abstract Texturing metallic zinc anodes (MZAs) for selective exposure of (002) Zn plane with high thermodynamical stability is an efficient scheme dendrite‐free electrodeposition. However, fundamental factors that influence deposition morphology via surface crystallographic texture engineering are not well understood. Herein, different from traditional cognition, MZAs preferential (101) facet demonstrated to be equally effective in promoting deposition, which enabled by introducing trace amount (0.01 m ) theophylline into ZnSO 4 electrolyte. Experimental results and mathematical model corroborate, indicating mechanistically the derived cations preferentially adsorb on crystal due higher adsorption energy, thereby accelerating its growth through increased binding affinity 2+ ions. Consequently, this phenomenon facilitates achieve ordered orientation (101‐Zn), thus enabling electrodeposition/dissolution cycling over 650 h under a depth discharge up 40% significantly boosting rechargeability (76.7% capacity retention after 1000 cycles) 101‐Zn||carbon‐cloth@MnO 2 full battery relative counterpart without additive (36.3%). The work offers deep insights scientific links between morphology, while opens vast untapped opportunities realize MZAs.

Язык: Английский

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Polymer Molecules Adsorption‐Induced Zincophilic‐Hydrophobic Protective Layer Enables Highly Stable Zn Metal Anodes

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 5, 2024

Zn metal, as one of the most promising anode materials for aqueous batteries, suffers from uncontrollable dendrite growth and water-induced parasitic reactions, which drastically compromise its cycle life Coulombic efficiency (CE). Herein, a nonionic amphipathic additive Tween-20 (TW20) is proposed that bears both zincophilic hydrophobic units. The segment TW20 preferentially adsorbs on anode, while exposed electrolyte side, forming an electrolyte-facing layer shields active water molecules. Moreover, theoretical calculation experimental results reveal can induce preferential (002) plane by adsorbing other facets, enabling dendrite-free anodes. Benefitting these advantages, stability reversibility anodes are substantially improved, reflected stable cycling over 2500 h at 1.0 mA cm

Язык: Английский

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Marangoni‐Driven Self‐Assembly MXene As Functional Membrane Enables Dendrite‐Free and Flexible Zinc–Iodine Pouch Cells

Advanced Energy Materials, Год журнала: 2024, Номер 14(26)

Опубликована: Март 20, 2024

Abstract Zn metal is a promising anode material in aqueous batteries, but the direct use of foil encounters severe issues dendrite formation and side reactions, causing short cycle life. Conventional thick rigid insulating protection layers may impede ion diffusion detach during mechanical deformation battery. Herein, dendrite‐free zinc demonstrated by grafting thin (≈10 nm) Ti 3 C 2 T x MXene functional membrane which formed via Marangoni‐driven self‐assembly. The initiates uniform nucleation promotes deposition (002)‐oriented lateral growth mode. Meanwhile, functions as soft, stress‐adaptive, protective layer to underneath active zinc. This renders with improved cycling stability without notable or side‐reaction products. Flexible Zn─I pouch cells fabricated from MXene‐covered (20 µm thick) modified ZnI cathode demonstrate stable capacity up 1500 cycles unchanged voltage upon various deformations. work affords new insights into designing soft membranes for constructing flexible Zn‐based energy devices.

Язык: Английский

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Poloxamer Pre-solvation Sheath Ion Encapsulation Strategy for Zinc Anode–Electrolyte Interfaces

ACS Energy Letters, Год журнала: 2023, Номер 9(1), С. 209 - 217

Опубликована: Дек. 21, 2023

Aqueous metal-ion batteries are considered next-generation energy storage devices with improved safety. However, they suffer from sluggish kinetics and side reactions. This work presents a zinc-ion encapsulation strategy based on the poloxamer pre-solvation sheath for realization of efficient zinc anode–electrolyte interfaces. The poloxamers can reversibly self-assemble into by electron-donating effect effectively shield ions surrounding water. also lowers activation desolvation, endowing promoted transference reaction kinetics. Accordingly, Zn||Zn cell electrolyte (Polo-ZnSO4) achieved over 2000 h cycles at 5 mA cm–2 even 500 10 cm–2. Zn||MnO2 battery delivers high stable capacity 240.9 mAh g–1 after 1000 1 A g–1. paves way use chemistry advanced aqueous metal Coulombic efficiency long lifetime.

Язык: Английский

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Molecular engineering of self-assembled monolayers for highly utilized Zn anodes

eScience, Год журнала: 2023, Номер 4(2), С. 100205 - 100205

Опубликована: Окт. 19, 2023

Stabilizing the Zn anode under high utilization rates is highly applauded yet very challenging in aqueous batteries. Here, we rationally design a zincophilic short-chain aromatic molecule, 4-mercaptopyridine (4Mpy), to construct self-assembled monolayers (SAMs) on copper substrate achieve utilized anodes. We reveal that 4Mpy could be firmly bound Cu via Cu−S bond form compact and uniform SAMs, which effectively isolate water electrode surface thus eliminate water-related side reactions. In addition, ring structure of not only ensure ordered arrangement pyridine N but also facilitate charge transfer, enabling rapid deposition. Consequently, Zn/4Mpy/Cu enables symmetric cell stably cycle for over 180 h at 10 mA cm−2 depth-of-discharge 90%, allows MnO2-paired pouch survive 100 cycles rate 78.8%. An anode-free 4Mpy/Cu||graphite operates 150 without obvious capacity fading 0.1 A g−1. This control interfacial chemistry SAMs metal anodes provides new paradigm developing high-energy metal-based

Язык: Английский

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Microfluidic‐Assisted 3D Printing Zinc Powder Anode with 2D Conductive MOF/MXene Heterostructures for High‐Stable Zinc−Organic Battery

Advanced Materials, Год журнала: 2023, Номер 36(6)

Опубликована: Ноя. 9, 2023

Abstract Zinc powder (Zn‐P) anodes have significant advantages in terms of universality and machinability compared with Zn foil anodes. However, their rough surface, which has a high surface area, intensifies the uncontrollable growth dendrites parasitic side reactions. In this study, an anti‐corrosive Zn‐P‐based anode functional layer formed from MXene Cu‐THBQ (MXene/Cu‐THBQ) heterostructure is successfully fabricated via microfluidic‐assisted 3D printing. The unusual strong adsorption ions using MXene/Cu‐THBQ can effectively homogenize ion flux inhibit hydrogen evolution reaction (HER) during repeated process plating/stripping, thus achieving stable cycling. Consequently, symmetric cell based on Zn‐P exhibits highly reversible cycling 1800 h at 2 mA cm −2 /1 mAh . Furthermore, Zn‐organic full battery matched 4‐hydroxy‐2,2,6,6‐tetramethylpiperidine‐1‐oxyl organic cathode riveted graphene delivers capacity maintains long cycle life.

Язык: Английский

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Global “Interface‐Space” Dual‐Modulation by Functional Supramolecules Organic Frameworks on Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, Год журнала: 2023, Номер 34(10)

Опубликована: Ноя. 21, 2023

Abstract The uneven zinc‐ion flux and interfacial contact between the anode electrolyte trigger malignant dendrites byproducts, significantly hindering practical application of zinc‐metal batteries. Herein, a H‐bonded supramolecular organic framework (HSOF) is proposed to help regulate Zn 2+ stabilize chemistry. self‐assembled supermolecule structures by in‐plane H‐bond networks firmly trap water molecules assist de‐solvation block corrosion. abundant polar groups provide strong guidance for distribution, ensuring homogeneous, rapid ion transport‐deposition kinetics. Meanwhile, π – stacked space‐layout structure affords preferred Zn(002) plane stacking smooth flat growth. Benefiting from these advantages, HSOFs are employed on surface adjustment separator decoration spatial manipulation, successfully realizing an overall “interface‐space” dual‐regulation effect. It delivers over 3000 h HSOF@Zn in symmetric cell up 5000 HSOF‐decorated Zn||Zn cell, respectively. HSOF@Zn||V 2 O 5 full with demonstrates enhanced capacity retention 92.7% after 2500 cycles at A g −1 . can be easily scaled into pouch which still has rate 94% 1000 cycles.

Язык: Английский

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