Cation‐Conduction Dominated Hydrogels for Durable Zinc–Iodine Batteries

Advanced Materials, Год журнала: 2024, Номер 36(21)

Опубликована: Фев. 13, 2024

Abstract Zinc–iodine batteries have the potential to offer high energy‐density aqueous energy storage, but their lifetime is limited by rampant dendrite growth and concurrent parasite side reactions on Zn anode, as well shuttling of polyiodides. Herein, a cation‐conduction dominated hydrogel electrolyte designed holistically enhance stability both zinc anode iodine cathode. In this electrolyte, anions are covalently anchored chains, major mobile ions in restricted be 2+ . Specifically, such cation‐conductive results ion transference number (0.81) within guides epitaxial nucleation. Furthermore, optimized solvation structure reconstructed hydrogen bond networks chains contribute reduced desolvation barrier suppressed corrosion reactions. On cathode side, electrostatic repulsion between negative sulfonate groups polyiodides hinders loss active material. This all‐round design renders zinc–iodine with reversibility, low self‐discharge, long lifespan.

Язык: Английский

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Tough, Anti‐Fatigue, Self‐Adhesive, and Anti‐Freezing Hydrogel Electrolytes for Dendrite‐Free Flexible Zinc Ion Batteries and Strain Sensors

Advanced Functional Materials, Год журнала: 2024, Номер 34(26)

Опубликована: Фев. 27, 2024

Abstract Quasi‐solid aqueous zinc ion batteries (AZIBs) based on flexible hydrogel electrolytes are promising substitutions of lithium‐ion owing to their intrinsic safety, low cost, eco‐friendliness and wearability. However, it remains a challenge lower the freezing point without sacrificing fundamental advantages such as conductivity mechanical properties. Herein, an all‐around electrolyte is constructed through convenient energy dissipation strategy via rapid reversible intramolecular/intermolecular ligand exchanges between Zn 2+ alterdentate ligands. The as‐obtained exhibits excellent properties, fatigue resistance, high Zn‐ion (38.2 mS cm −1 ), good adhesion (19.1 kPa), ultra‐low (−97 °C). Due ligands help improve solvation structure guide uniform deposition, Zn||Zn symmetric cells show stable plating/stripping behavior long‐term cycle stability. Zn||V 2 O 5 full exhibit large capacity 230.6 mAh g retention 75.2% after 1000 cycles. Furthermore, AZIBs operate stably even under extreme conditions including temperature (−40 °C) bending angle (180°). mechanically damage‐resistant can also be utilized in strain sensors. This work offers facile for developing deformation‐resistant, dendrite‐free, environmentally adaptable AZIBs.

Язык: Английский

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Design of Fatigue‐Resistant Hydrogels

Advanced Functional Materials, Год журнала: 2024, Номер 34(21)

Опубликована: Янв. 4, 2024

Abstract Hydrogels are made tough to resist crack propagation. However, for seamless integration into devices and machines, it necessitates robustness against cyclic loads. Central this objective is enhancing fatigue resistance, an indispensable attribute facilitating the optimal performance of hydrogels within a multitude biological contexts, spanning various plant animal tissues, as well diverse biomedical engineering areas. In review, recent research concerning behavior hydrogels, presenting comprehensive consolidation inherent mechanisms that underpin strategies aimed at fortifying summarized. A critical facet in architectural blueprint fatigue‐resistant emphasized, involving imposition spatial constraints upon main chains tips, thereby effectuating protracted delay their fracture initiation during prolonged loading. The multiscale encompassing networks, interactions, media, structures stands pivotal factor design hydrogels. It hoped review will considerably propel pragmatic deployment across array applications, thus catalyzing advancements multiple fields.

Язык: Английский

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A Polyanionic Hydrogel Electrolyte with Ion Selective Permeability for Building Ultra‐Stable Zn/I₂ Batteries with 100 °C Wide Temperature Range

Advanced Functional Materials, Год журнала: 2024, Номер 34(29)

Опубликована: Март 10, 2024

Abstract The practical applications of aqueous Zn/I 2 batteries (AZIBs) operating within a wide temperature range are severely hindered by the uncontrolled shutting polyiodide ions (I 3 − / I 5 ) and rampant side reactions. In this study, tolerant polyanionic hydrogel (borax‐bacteria cellulose p (AMPS‐AM)) with ion selective permeability is designed for inhibiting effect reactions under extreme temperatures from −50 to 50 °C. zincophilic R−SO significantly enhances transport Zn 2+ cations promotes uniform growth metal along (002) plane. Moreover, abundant hydrophilic groups in hydrogels effectively suppress both hydrogen evolution reaction formation by‐products reducing water reactivity. Furthermore, theoretical calculations, visualization experiment situ Raman spectroscopy confirm that group hinders shuttle process /I anions through electrostatic repulsion. Consequently, gel electrolyte facilitates ultra‐stable full cell at low current density C over 100 A pouch negative/positive capacity ratio 3.3 exhibits stable performance 350 cycles an impressive high‐areal 2.03 mA h cm −2 , thereby establishing solid foundation its applications.

Язык: Английский

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Ether-Based Gel Polymer Electrolyte for High-Voltage Potassium Ion Batteries

Nano Letters, Год журнала: 2024, Номер 24(37), С. 11419 - 11428

Опубликована: Сен. 3, 2024

Low-concentration ether electrolytes cannot efficiently achieve oxidation resistance and excellent interface behavior, resulting in severe electrolyte decomposition at a high voltage ineffective electrode-electrolyte interphase. Herein, we utilize sandwich structure-like gel polymer (GPE) to enhance the stability of potassium-ion batteries (PIBs). The GPE contact layer facilitates stable interphase formation, transport maintains good ionic transport, which enabled exhibit wide electrochemical window performance. In addition, Al corrosion under is suppressed through restriction solvent molecules. Consequently, when using designed (based on 1 m), K||graphite cell exhibits cycling 450 cycles with capacity retention 91%, K||FeFe-Prussian blue (2-4.2 V) delivers average Coulombic efficiency 99.9% over 2200 100 mA g

Язык: Английский

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Wood-inspired anisotropic hydrogel electrolyte with large modulus and low tortuosity realizing durable dendrite-free zinc-ion batteries

Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(21)

Опубликована: Май 15, 2024

While aqueous zinc-ion batteries exhibit great potential, their performance is impeded by zinc dendrites. Existing literature has proposed the use of hydrogel electrolytes to ameliorate this issue. Nevertheless, mechanical attributes electrolytes, particularly modulus, are suboptimal, primarily ascribed substantial water content. This drawback would severely restrict dendrite-inhibiting efficacy, especially under large mass loadings active materials. Inspired structural characteristics wood, study endeavors fabricate anisotropic carboxymethyl cellulose electrolyte through directional freezing, salting-out effect, and compression reinforcement, aiming maximize modulus along direction perpendicular electrode surface. The heightened concurrently serves suppress vertical deposition intermediate product at cathode. Meanwhile, oriented channels with low tortuosity enabled structure beneficial ionic transport between anode Comparative analysis an isotropic sample reveals a marked enhancement in both conductivity hydrogel. contributes significantly improved stripping/plating reversibility mitigated electrochemical polarization. Additionally, durable quasi-solid-state Zn//MnO 2 battery noteworthy volumetric energy density realized. offers unique perspectives for designing augmenting performance.

Язык: Английский

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Flexible electrochemical energy storage devices and related applications: recent progress and challenges

Chemical Science, Год журнала: 2024, Номер 15(29), С. 11229 - 11266

Опубликована: Янв. 1, 2024

This paper reviews advancements in flexible carbon-based and polymer gel materials for various types of energy storage systems, providing guidance future development next-generation wearable electronics.

Язык: Английский

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Improvements and Challenges of Hydrogel Polymer Electrolytes for Advanced Zinc Anodes in Aqueous Zinc-Ion Batteries

ACS Nano, Год журнала: 2024, Номер 18(33), С. 21779 - 21803

Опубликована: Авг. 12, 2024

Aqueous zinc-ion batteries (AZIBs) are widely regarded as desirable energy storage devices due to their inherent safety and low cost. Hydrogel polymer electrolytes (HPEs) cross-linked polymers filled with water zinc salts. They not only used in flexible but also represent an ideal electrolyte candidate for addressing the issues associated Zn anode, including dendrite formation side reactions. In HPEs, abundance of hydrophilic groups can form strong hydrogen bonds molecules, reducing activity inhibiting decomposition. At same time, special

Язык: Английский

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An Ultrahigh‐Modulus Hydrogel Electrolyte for Dendrite‐Free Zinc Ion Batteries

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 14, 2024

Abstract Quasi‐solid‐state aqueous zinc ion batteries suffer from anodic dendrite growth during plating/stripping processes, impeding their commercial application. The inhibition of dendrites by high‐modulus electrolytes has been proven to be effective. However, hydrogel are difficult achieve high modulus owing inherent water contents. This work reports a electrolyte with ultrahigh that can overcome the stress through mechanical suppression effect. By combining wet‐annealing, solvent‐exchange, and salting‐out processes tuning hydrophobic crystalline domains, is obtained substantial content (≈70%), (198.5 MPa), toughness (274.3 MJ m −3 ), zinc‐ion conductivity (28.9 mS cm −1 which significantly outperforms previously reported poly(vinyl alcohol)‐based hydrogels. As result, exhibits excellent dendrite‐suppression effect achieves stable performance in Zn||Zn symmetric (1800 h cycle life at 1 mA −2 ). Moreover, Zn||V 2 O 5 pouch display cycling operate stably even under extreme conditions, such as large bending angle (180°) automotive crushing. provides promising approach for designing mechanically reliable advanced batteries.

Язык: Английский

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Optimization Strategy of Surface and Interface in Electrolyte Structure of Aqueous Zinc-Ion Battery

ACS Materials Letters, Год журнала: 2024, Номер 6(5), С. 1938 - 1960

Опубликована: Апрель 12, 2024

Aqueous zinc-ion batteries (AZIBs) are increasingly regarded as promising candidates for large-scale energy storage, because of their advantageous features such high safety, low cost, abundant resources, and environmental friendliness. However, challenges persist with zinc anodes, including issues Coulombic efficiency (CE) poor long-term cycle stability due to dendrites, hydrogen evolution, passivation reactions. These mainly attributed the thermodynamic instability anodes in aqueous electrolytes, leading a shorter battery life. The optimization electrolyte structure has emerged straightforward impactful strategy, making substantial advancements addressing associated systematic manner. This account undertakes comprehensive analysis formation process interface between anode. Strategies involve precise regulation Zn nucleation layer, construction situ artificial anode optimization, design solid interphase (SEI) protective layer. By delving into these critical aspects, review aims provide concise synthesis future outlook on strategies batteries, offering valuable insights enhancing overall performance.

Язык: Английский

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