Engineering a self-adaptive electric double layer on both electrodes for high-performance zinc metal batteries

Energy & Environmental Science, Год журнала: 2022, Номер 15(11), С. 4748 - 4760

Опубликована: Янв. 1, 2022

A zwitterionic ionic liquid additive enables a high-performance aqueous Zn metal battery via constructing self-adaptive electric double layer for both electrodes.

Язык: Английский

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Multifunctional SEI-like structure coating stabilizing Zn anodes at a large current and capacity

Energy & Environmental Science, Год журнала: 2022, Номер 16(1), С. 275 - 284

Опубликована: Ноя. 30, 2022

The SEI-like structure coating can combine the advantages of each component and give sufficient mechanical stability to coating. establishment fast Zn 2+ migrating pathway supports cycling anode at large current capacity.

Язык: Английский

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Rational Screening of Artificial Solid Electrolyte Interphases on Zn for Ultrahigh‐Rate and Long‐Life Aqueous Batteries

Advanced Materials, Год журнала: 2022, Номер 35(2)

Опубликована: Окт. 17, 2022

Solid electrolyte interphase (SEI) on Zn anodes plays a pivotal role for high-rate and long-life aqueous batteries, because it effectively inhibits side reactions dendritic growth. Many materials are explored as SEIs by trial-and-error approach. Herein, an exercisable way is proposed to screen the potential in view of dendrite-suppressing ability charge-transfer property theoretically. As output this screening, Zn3 (BO3 )2 (ZBO) checked experimentally. In symmetrical cells, Zn@ZBO runs over 250 h at ultrahigh current density 50 mA cm-2 large areal capacity 10 mAh . full Zn@ZBO||MnO2 shows impressive cumulative (≈406 ) under harsh conditions, i.e., lean condition (10 µL mAh-1 ), limited supply (negative/positive electrode ratio, N/P ratio = 2.3), high (5.0 ). The significance work lies not only first report ZBO showing excellent electrochemical performance, but also feasible promising SEI other metal anodes.

Язык: Английский

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High‐Capacity Zinc Anode with 96 % Utilization Rate Enabled by Solvation Structure Design

Angewandte Chemie International Edition, Год журнала: 2022, Номер 62(3)

Опубликована: Ноя. 5, 2022

Aqueous zinc-ion batteries (AZBs) show promises for large-scale energy storage. However, the zinc utilization rate (ZUR) is generally low due to side reactions in aqueous electrolyte caused by active water molecules. Here, we design a novel solvation structure introduction of sulfolane (SL). Theoretical calculations, molecular dynamics simulations and experimental tests that SL remodels primary shell Zn2+ , which significantly reduces Zn anode achieves high ZUR under large capacities. Specifically, symmetric asymmetric cells could achieve maximum ∼96 % at an areal capacity 24 mAh cm-2 . In ∼67 %, developed Zn-V2 O5 full cell can be stably cycled 500 cycles with density 180 Wh kg-1 Zn-AC capacitor stable 5000 cycles. This structural engineering strategy provides new insight into achieving anodes performance AZBs.

Язык: Английский

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Zincophilic Electrode Interphase with Appended Proton Reservoir Ability Stabilizes Zn Metal Anodes

Angewandte Chemie International Edition, Год журнала: 2022, Номер 62(5)

Опубликована: Ноя. 30, 2022

Abstract The rampant dendrites and hydrogen evolution reaction (HER) resulting from the turbulent interfacial at anode/electrolyte are main culprits of short lifespan low Coulombic efficiency Zn metal batteries. In this work, a versatile protective coating with excellent zincophilic amphoteric features is constructed on surface (ZP@Zn) as dendrite‐free anodes. This kind possesses advantages reversible proton storage rapid desolvation kinetics, thereby mitigating HER facilitating homogeneous nucleation concomitantly. Furthermore, space charge polarization effect promotes redistribution to achieve uniform deposition. Accordingly, ZP@Zn symmetric cell manifests reversibility an ultrahigh cumulative plating capacity 4700 mAh cm −2 stable cycling 80 % depth discharge (DOD). ZP@Zn//V 6 O 13 pouch also reveals superior stability high 326.6 g −1 .

Язык: Английский

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Fluoride-Rich, Organic–Inorganic Gradient Interphase Enabled by Sacrificial Solvation Shells for Reversible Zinc Metal Batteries

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(41), С. 22456 - 22465

Опубликована: Окт. 6, 2023

Zinc metal batteries are strongly hindered by water corrosion, as solvated zinc ions would bring the active molecules to electrode/electrolyte interface constantly. Herein, we report a sacrificial solvation shell repel from and assist in forming fluoride-rich, organic-inorganic gradient solid electrolyte (SEI) layer. The simultaneous process of methanol Zn(CF3SO3)2 results SEI layer with an organic-rich surface (CH2OC- C5 product) inorganic-rich (ZnF2) bottom, which combines merits fast ion diffusion high flexibility. As result, additive enables corrosion-free stripping/plating on copper foils for 300 cycles average coulombic efficiency 99.5%, record cumulative plating capacity 10 A h/cm2 at 40 mA/cm2 Zn/Zn symmetrical batteries. More importantly, ultralow N/P ratio 2, practical VO2//20 μm thick Zn plate full areal 4.7 mAh/cm2 stably operate over 250 cycles, establishing their promising application grid-scale energy storage devices. Furthermore, directly utilizing 20 commercial-level (4.7 mAh/cm2) battery our work simplify manufacturing boost development commercial stationary storage.

Язык: Английский

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Self-assembled multilayers direct a buffer interphase for long-life aqueous zinc-ion batteries

Energy & Environmental Science, Год журнала: 2023, Номер 16(8), С. 3381 - 3390

Опубликована: Янв. 1, 2023

A self-assembled multilayer was used to homogenize ion flux and accelerate charge transfer through area-induced deposition effects strong dipole moments. The molecular domains act as a buffer interphase achieve long-term stability.

Язык: Английский

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Kinetics‐Boosted Effect Enabled by Zwitterionic Hydrogel Electrolyte for Highly Reversible Zinc Anode in Zinc‐Ion Hybrid Micro‐Supercapacitors

Advanced Energy Materials, Год журнала: 2022, Номер 12(40)

Опубликована: Авг. 25, 2022

Abstract Despite impressive merits of complementary charge‐storage mechanisms for aqueous Zn‐ion hybrid micro‐supercapacitors (ZHMSCs), it remains a challenge to solve dendrite and parasitic reactions issues Zn anodes. Herein, kinetics‐boosted strategy 2+ transport desolvation hydrated is proposed by engineering zwitterionic P(AM‐ co ‐SBMA) hydrogel electrolyte (PASHE) highly reversible plating/stripping. Mechanically robust chemically anchored PASHE features groups constructing ion migration channels immobilizing water molecules, which accelerates an ultrahigh transfer number (0.84) alleviates water‐related reactions. Theoretical calculations combined with experimental results reveal that sulfobetaine sulfonate anions endow improved kinetics the ability coordinate flux electric field distributions at electrolyte–electrode interface. Thus, anodes exhibit excellent electrochemical performance involving high average coulombic efficiency 99.4% in Zn|PASHE|Cu cell as well cumulative capacity 2000 mAh cm −2 (20 mA , 1 ) depth discharge 80.9% 10 Zn|PASHE|Zn cells. Furthermore, ZHMSCs based on deliver flexibility cyclability energy‐storage applications. This work provides useful insights developing high‐performance derived devices.

Язык: Английский

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A stable fluoride-based interphase for a long cycle Zn metal anode in an aqueous zinc ion battery

Journal of Materials Chemistry A, Год журнала: 2022, Номер 10(27), С. 14399 - 14410

Опубликована: Янв. 1, 2022

CaF 2 , which served as the F-rich artificial interphase on Zn anode was prepared by spin-coating method. The layer can effectively adjust uniform deposition of and inhibit corrosion side reactions between electrode surface electrolyte.

Язык: Английский

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Stable anode-free zinc-ion batteries enabled by alloy network-modulated zinc deposition interface

Journal of Energy Chemistry, Год журнала: 2022, Номер 76, С. 32 - 40

Опубликована: Сен. 19, 2022

Язык: Английский

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