Improved Interfacial Ion Migration and Deposition through the Chain‐Liquid Synergistic Effect by a Carboxylated Hydrogel Electrolyte for Stable Zinc Metal Anodes

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(42)

Published: Aug. 30, 2023

The large-scale applicability of Zn-metal anodes is severely impeded by the issues such as dendrite growth, complicated hydrogen evolution, and uncontrollable passivation reaction. Herein, a negatively charged carboxylated double-network hydrogel electrolyte (Gelatin/Sodium alginate-acetate, denoted Gel/SA-acetate) has been developed to stabilize interfacial electrochemistry, which restructures type Zn2+ ion solvent sheath optimized via chain-liquid synergistic effect. New bonds are reconstructed with water molecules zincophilic functional groups, directional migration hydrated ions therefore induced. Concomitantly, robust chemical bonding layers Zn slab exhibits desirable anti-catalytic effect, thereby greatly diminishing activity eliminating side reactions. Subsequently, symmetric cell using Gel/SA-acetate demonstrates reversible plating/stripping performance for 1580 h, an asymmetric reaches state-of-the-art runtime 5600 h high average Coulombic efficiency 99.9 %. resultant zinc hybrid capacitors deliver exceptional properties including capacity retention 98.5 % over 15000 cycles, energy density 236.8 Wh kg-1 , mechanical adaptability. This work expected pave new avenue development novel electrolytes towards safe stable anodes.

Language: Английский

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Electric double layer design for Zn-based batteries

Energy storage materials, Journal Year: 2023, Volume and Issue: 62, P. 102932 - 102932

Published: Aug. 16, 2023

Language: Английский

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Nanomicellar Electrolyte To Control Release Ions and Reconstruct Hydrogen Bonding Network for Ultrastable High-Energy-Density Zn–Mn Battery

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(36), P. 20109 - 20120

Published: Sept. 1, 2023

Zn–Mn batteries with two-electron conversion reactions simultaneously on the cathode and anode harvest a high voltage plateau energy density. However, zinc faces dendrite growth parasitic side while Mn2+/MnO2 reaction involves oxygen evolution possesses poor reversibility. Herein, novel nanomicellar electrolyte using methylurea (Mu) has been developed that can encapsulate ions in nanodomain structure to guide homogeneous deposition of Zn2+/Mn2+ form controlled release under an external electric field. Consecutive hydrogen bonding network is broken favorable local system established, thus inhibiting water-splitting-derived reactions. Concomitantly, solid–electrolyte interface protective layer situ generated Zn anode, further circumventing corrosion issue resulting from penetration water molecules. The reversibility also significantly enhanced by regulating interfacial wettability improving nucleation kinetics. Accordingly, modified endows symmetric Zn∥Zn cell extended cyclic stability 800 h suppressed dendrites at areal capacity 1 mAh cm–2. assembled electrolytic battery demonstrates exceptional retention nearly 100% after cycles superior density Wh kg–1 0.5

Language: Английский

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Synergistic Modulation of In‐Situ Hybrid Interface Construction and pH Buffering Enabled Ultra‐Stable Zinc Anode at High Current Density and Areal Capacity

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(45)

Published: Sept. 25, 2023

In aqueous electrolytes, the uncontrollable interfacial evolution caused by a series of factors such as pH variation and unregulated Zn2+ diffusion would usually result in rapid failure metallic Zn anode. Considering high correlation among various triggers that induce anode deterioration, synergistic modulation strategy based on electrolyte modification is developed. Benefitting from unique buffer mechanism additive its capability to situ construct zincophilic solid interface, this effect can comprehensively manage thermodynamic kinetic properties inhibiting parasitic side reactions, accelerating de-solvation hydrated , regulating behavior realize uniform deposition. Thus, modified achieve an impressive lifespan at ultra-high current density areal capacity, operating stably for 609 209 hours 20 mA cm-2 mAh 40 respectively. Based exceptional performance, loading Zn||NH4 V4 O10 batteries excellent cycle stability rate performance. Compared with those previously reported single strategies, concept expected provide new approach highly stable zinc-ion batteries.

Language: Английский

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Electrolyte Additives for Stable Zn Anodes

Advanced Science, Journal Year: 2023, Volume and Issue: 11(4)

Published: Nov. 27, 2023

Abstract Zn‐ion batteries are regarded as the most promising for next‐generation, large‐scale energy storage because of their low cost, high safety, and eco‐friendly nature. The use aqueous electrolytes results in poor reversibility leads to many challenges related Zn anode. Electrolyte additives can effectively address such challenges, including dendrite growth corrosion. This review provides a comprehensive introduction major current strategies used anode protection. In particular, an in‐depth fundamental understanding is provided various functions electrolyte additives, electrostatic shielding, adsorption, situ solid interphase formation, enhancing water stability, surface texture regulation. Potential future research directions also discussed.

Language: Английский

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Adaptive Ionization-Induced Tunable Electric Double Layer for Practical Zn Metal Batteries over Wide pH and Temperature Ranges

ACS Nano, Journal Year: 2023, Volume and Issue: 17(22), P. 23181 - 23193

Published: Nov. 13, 2023

The violent side reactions of Zn metal in aqueous electrolyte lead to sharp local-pH fluctuations at the interface, which accelerate anode breakdown; thus, development an optimization strategy accommodate a wide pH range is particularly critical for improving batteries. Herein, we report pH-adaptive electric double layer (EDL) tuned by glycine (Gly) additive with pH-dependent ionization, exhibits excellent capability stabilize anodes wide-pH electrolytes. It discovered that Gly-ionic EDL facilitates directed migration charge carriers both mildly acidic and alkaline electrolytes, leading successful suppression local saturation. worth mentioning regulation effect concentration on inner Helmholtz plane (IHP) structure electrodes clarified depth. revealed Gly additives without dimerization can develop orderly dense vertical adsorption within IHP effectively reduce repulsive force Zn2+ isolate H2O from surface. Consequently, they tunable superior electrochemical performance temperature, involving prodigious cycle reversibility 7000 h symmetric cells ZnSO4-Gly electrolytes extended lifespan 50 times KOH-Gly Moreover, powder||MnO2 pouch cells, high-voltage Zn||Ni0.8Co0.1Mn0.1O2 Zn||NiCo-LDH also deliver cycling reversibility. enables ultrahigh depth discharge (DOD) 93%. This work elucidates design compatible might cause inspiration fields practical multiapplication scenarios anodes.

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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Toward Low‐Temperature Zinc‐Ion Batteries: Strategy, Progress, and Prospect in Vanadium‐Based Cathodes

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(8)

Published: Dec. 28, 2023

Abstract Low‐temperature vanadium‐based zinc ion batteries (LT‐VZIBs) have attracted much attention in recent years due to their excellent theoretical specific capacities, low cost, and electrochemical structural stability. However, working temperature surrounding often results retarded transport not only the frozen aqueous electrolyte, but also at/across cathode/electrolyte interface inside cathode interior, significantly limiting performance of LT‐VZIBs for practical applications. In this review, a variety strategies solve these issues, mainly including interface/bulk structure engineering electrolyte optimizations, are categorially discussed systematically summarized from design principles in‐depth characterizations mechanisms. end, several issues about future research directions advancements characterization tools prospected, aiming facilitate scientific commercial development LT‐VZIBs.

Language: Английский

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Building Near‐Unity Stacked (002) Texture for High‐Stable Zinc Anode

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(14)

Published: Dec. 21, 2023

Abstract Dendrite‐free Zn anode is the key to avoiding battery failure, which largely determined by crystal growth during electrodeposition process. Therefore, controlling specific orientation of imperative for high‐performing aqueous zinc ion batteries. Herein, an electrocrystallization regulation strategy proposed achieve near‐unity stacked (002) texture growth. Featuring zincophilic nature and high electronegative carboxylate radical, disodium maleate molecules tend selectively adsorb on plane, forming a dynamic protection layer. This adsorption layer regulates 2+ diffusion along [100] [101] orientations with lowest deposition rate homogenizes flux, keeps away water from surface, constructing flattened horizontally arranged dominantly inhibited side‐reaction. Consequently, exhibits 40‐fold enhancement in running lifetime beyond 3200 h improved coulombic efficiency 99.81% over 3000 cycles than that bare ZnSO 4 electrolyte. Even at harsh plating/stripping conditions 30 mAh cm −2 , still sustains state‐of‐the‐art stability 120 h, enabling substantial advance long‐term battery.

Language: Английский

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Enhancing Zn‐Metal Anode Stability: Key Effects of Electrolyte Additives on Ion‐Shield‐Like Electrical Double Layer and Stable Solid Electrolyte Interphase

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(18)

Published: Jan. 16, 2024

Abstract Owing to zinc dendrites and parasitic reactions, aqueous Zn‐metal batteries often suffer from poor reversibility cyclability. Electrolyte additives present a promising strategy improve Zn anode stability. However, the ever‐evolving perspectives mechanisms, paradoxically, complicate battery design, causing scenario where any electrolyte additive seems be effective. Herein, it is taken ionic liquid (IL) as an example detailed explored impact of three typical IL anions, namely OTF − , TFA BF 4 . It identified that primary determinant their electrical double layer (EDL) structures subsequent solid‐electrolyte interface (SEI) composition. An advantageous EDL structure, akin ion‐shield, can reduce absorption H 2 O molecules, which further enrich SEI with zincophilic hydrophobic components, thereby mitigating reactions dendrite formation. As result, Zn||Zn cell optimal [EMIM]OTF demonstrates exceptional cycling life under challenging conditions, its cumulative plated capacity surpasses most previously reported results by utilizing different additives. This work extends beyond performance enhancements, representing valuable exploration key criteria for believed. These insights are expected offer fundamental guidance future research design.

Language: Английский

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