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

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(41), P. 22456 - 22465

Published: Oct. 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.

Language: Английский

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Opportunities and challenges of zinc anodes in rechargeable aqueous batteries

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(23), P. 11987 - 12001

Published: Jan. 1, 2023

This review summarizes the fundamental understanding of issues and strategies on zinc anode. The electrolyte engineering is discussed. Techniques applied analysing interaction between anodes electrolytes are summarized.

Language: Английский

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Polymer Coating with Balanced Coordination Strength and Ion Conductivity for Dendrite‐Free Zinc Anode

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(3)

Published: Oct. 11, 2023

Abstract Decorating Zn anodes with functionalized polymers is considered as an effective strategy to inhibit dendrite growth. However, this normally brings extra interfacial resistance rendering slow reaction kinetics of 2+ . Herein, a poly(2‐vinylpyridine) (P2VP) coating modulated coordination strength and ion conductivity for dendrite‐free anode reported. The P2VP favors high electrolyte wettability rapid migration speed (Zn transfer number, t = 0.58). Electrostatic potential calculation shows that mildly coordinates (adsorption energy −0.94 eV), which promotes preferential deposition along the (002) crystal plane. Notably, use partially (26%) quaternized (q‐P2VP) further reduces 126 Ω, leading ( 0.78) considerably low nucleation overpotential (18 mV). As result synergistic effect mild partial electrolysis, q‐P2VP‐decorated retains at level (≈46 mV) over 1000 h current density 10 mA cm −2 assembled (NH 4 ) 2 V 6 O 16 ·1.5H || glass fiber q‐P2VP‐Zn full cell reveals lower average capacity decay rate only 0.018% per cycle within 500 cycles 1 A g −1

Language: Английский

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Maximizing Electrostatic Polarity of Non‐Sacrificial Electrolyte Additives Enables Stable Zinc‐Metal Anodes for Aqueous Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(40)

Published: Aug. 16, 2023

Abstract Although additives are widely used in aqueous electrolytes to inhibit the formation of dendrites and hydrogen evolution reactions on Zn anodes, there is a lack rational design principles systematic mechanistic studies how select suitable additive regulate reversible plating/stripping chemistry. Here, using saccharides as representatives, we reveal that electrostatic polarity non‐sacrificial critical descriptor for their ability stabilize anodes. Non‐sacrificial found continuously modulate solvation structure ions form molecular adsorption layer (MAL) uniform deposition, avoiding thick solid electrolyte interphase due decomposition sacrificial additives. A high renders sucrose best hydrated 2+ desolvation facilitates MAL formation, resulting cycling stability with long‐term cycle life thousands hours. This study provides theoretical guidance screening optimal high‐performance ZIBs.

Language: Английский

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Synergetic impact of oxygen and vanadium defects endows NH4V4O10 cathode with superior performances for aqueous zinc-ion battery

Energy storage materials, Journal Year: 2023, Volume and Issue: 65, P. 103108 - 103108

Published: Dec. 11, 2023

Language: Английский

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Biomimetic Superstructured Interphase for Aqueous Zinc-Ion Batteries

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(22), P. 15496 - 15505

Published: May 24, 2024

The practical application of aqueous zinc-ion batteries (AZIBs) is greatly challenged by rampant dendrites and pestilent side reactions resulting from an unstable Zn–electrolyte interphase. Herein, we report the construction a reliable superstructured solid electrolyte interphase for stable Zn anodes using mesoporous polydopamine (2D-mPDA) platelets as building blocks. shows biomimetic nacre's "brick-and-mortar" structure artificial transmembrane channels hexagonally ordered mesopores in plane, overcoming mechanical robustness ionic conductivity trade-off. Experimental results simulations reveal that −OH −NH groups on surface ion can promote rapid desolvation kinetics serve sieve to homogenize Zn2+ flux, thus inhibiting ensuring uniform deposition without dendrites. 2D-mPDA@Zn electrode achieves ultralow nucleation potential 35 mV maintains Coulombic efficiency 99.8% over 1500 cycles at 5 mA cm–2. Moreover, symmetric battery exhibits prolonged lifespan 580 h high current density 20 This also demonstrates feasibility Zn//VO2 full cells paves new route rechargeable metal-ion batteries.

Language: Английский

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Polymers for Aqueous Zinc‐Ion Batteries: From Fundamental to Applications Across Core Components

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(12)

Published: Feb. 19, 2024

Abstract Aqueous zinc‐ion batteries (AZIBs) comprising zinc anodes hold intrinsic safety and high energy density ideally for distributed large‐scale storage, thus have generated intriguing properties increasing research interests. Unlike organic batteries, AZIBs require different, sometimes even opposite design principles preparation strategies in solvent, electrolyte, separator. This is especially true the polymer materials that are widely used as critical components stabilizing metal functioning high‐performance safe cathode materials. review discusses explicit compositional structural requisite of polymeric AZIBs, with an emphasis on exclusive molecular structure–property relationship governs stability, reversibility, capacity these devices. The usage polymers classified into five categories aligning primary architecture AZIBs: separators, additives, hydrogel electrolytes, coatings, electrode most recent advances structure/property interplay by novel synthesis techniques targeting stable summarized discussed. challenges perspectives multifunctional developing also proposed.

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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Synergy of Dendrites‐Impeded Atomic Clusters Dissociation and Side Reactions Suppressed Inert Interface Protection for Ultrastable Zn Anode

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(19)

Published: Feb. 7, 2024

The sluggish ions-transfer and inhomogeneous ions-nucleation induce the formation of randomly oriented dendrites on Zn anode, while chemical instability at anode-electrolyte interface triggers detrimental side reactions. Herein, this report in situ designs a multifunctional hybrid interphase Bi/Bi

Language: Английский

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Activating and Stabilizing a Reversible four Electron Redox Reaction of I⁻/I⁺ for Aqueous Zn‐Iodine Battery

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(25)

Published: March 19, 2024

Abstract Low capacity and poor cycle stability greatly inhibit the development of zinc‐iodine batteries. Herein, a high‐performance Zn‐iodine battery has been reached by designing optimizing both electrode electrolyte. The Br − is introduced as activator to trigger I + , coupled with forming interhalogen stabilize achieve four‐electron reaction, which promotes capacity. And Ni−Fe−I LDH nanoflowers serve confinement host enable reactions /I occurring in layer due spacious stable interlayer spacing LDH, effectively suppresses iodine‐species shuttle ensuring high cycling stability. As result, electrochemical performance enhanced, especially specific (as 350 mAh g −1 at 1 A far higher than two‐electron transfer batteries) (94.6 % retention after 10000 cycles). This strategy provides new way realize long‐term

Language: Английский

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