Metallic Particles‐Induced Surface Reconstruction Enabling Highly Durable Zinc Metal Anode

Advanced Functional Materials, Год журнала: 2023, Номер 33(38)

Опубликована: Июнь 4, 2023

Abstract Aqueous zinc batteries usher in a renaissance due to their intrinsic security and cost effectiveness, bespeaking vast application foreground for large‐scale energy storage system. However, uncontrolled dendrite growth along with hydrogen evolution severely restricts its reversibility stability practical application. Herein, the surface of Zn metal is reconstructed metallic particles (In, Sn, In 0.2 Sn 0.8 ) diminish defects regulate deposition behavior. The alloyed In–Sn greatly activates lower adsorption barrier expedite plating kinetics confine aggregation. Dense uniform on significantly prevents substrate from dendrites catastrophic damage. Meanwhile, alloy layer embodies high overpotential, ensuring stripping efficiency anode. Consequently, realizes long‐term lifespan up 1800 h low polarization (12 mV) at condition 1 mA cm −2 mAh . When paired sodium vanadate (NVO) cathode, full cell steady operates high‐capacity retention 94.0% after 5000 cycles 5 A g −1 This study provides new insights into surface‐defects dependent process offers guide constructing stable dendrite‐free growth.

Язык: Английский

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Recent advances in electrode engineering strategies for aqueous Zn-based batteries

Chem, Год журнала: 2023, Номер 9(5), С. 1118 - 1146

Опубликована: Апрель 25, 2023

Язык: Английский

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Mitigating the interfacial concentration gradient by negatively charged quantum dots toward dendrite-free Zn anodes

Energy storage materials, Год журнала: 2023, Номер 58, С. 215 - 221

Опубликована: Март 27, 2023

Язык: 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, Год журнала: 2023, Номер 145(36), С. 20109 - 20120

Опубликована: Сен. 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

Язык: Английский

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Nitrogen‐Doped and Sulfonated Carbon Dots as a Multifunctional Additive to Realize Highly Reversible Aqueous Zinc‐Ion Batteries

Small, Год журнала: 2023, Номер 19(31)

Опубликована: Янв. 17, 2023

Aqueous zinc-ion batteries (ZIBs) using the Zn metal anode have been considered as one of next-generation commercial with high security, robust capacity, and low price. However, parasitic reactions, notorious dendrites limited lifespan still hamper their practical applications. Herein, an eco-friendly nitrogen-doped sulfonated carbon dots (NSCDs) is designed a multifunctional additive for cheap aqueous ZnSO4 electrolyte, which can overcome above difficulties effectively. The abundant polar groups (-COOH, -OH, -NH2 , -SO3 H) on CDs surfaces regulate solvation structure Zn2+ through decreasing coordinated active H2 O molecules, thus redistribute deposition to avoid side reactions. Some negatively charged NSCDs are adsorbed surface isolate O/SO42- corrosion electrostatic shielding effect. synergistic effect doped nitrogen species sulfonic induce uniform electrolyte flux homogeneous plating (002) texture. As result, excellent cycle life (4000 h) Coulombic efficiency (99.5%) optimized ZIBs realized in typical electrolytes only 0.1 mg mL-1 additive.

Язык: Английский

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Facile Access to Fabricate Carbon Dots and Perspective of Large‐Scale Applications

Small, Год журнала: 2022, Номер 19(31)

Опубликована: Дек. 7, 2022

Abstract Carbon dots (CDs), fluorescent carbon nanoparticles with particle sizes < 10 nm, are constantly being developed for potential large‐scale applications. Recently, methods allow CD synthesis to be carried out on preparation in a controlled fashion potentially important multiple disciplines, including bottom‐up strategy, top‐down method. In this review, the recent progresses research of production CDs and their functionalization summarized. Especially, synthesis, such as preparation, hydrothermal/solvothermal, microwave‐assisted, magnetic hyperthermia microfluidic other methods, along CDs, summarized detail. By promising applications there three aspects have been already reported, enhancing mechanical properties, flame retardancy, energy storage. Also, future development is prospected.

Язык: Английский

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Rationally Designing Closed Pore Structure by Carbon Dots to Evoke Sodium Storage Sites of Hard Carbon in Low‐Potential Region

Advanced Functional Materials, Год журнала: 2023, Номер 34(4)

Опубликована: Окт. 15, 2023

Abstract Hard carbon (HC) is widely regarded as the most promising anode material for sodium‐ion batteries (SIBs). For improving sodium storage capacity of HC anode, current research primarily focuses on high‐voltage slope region. Actually, increasing capability in low‐voltage plateau region more important enhancing energy density full cells. Therefore, this study, with rich closed pore structure designed and constructed help dots (CDs), it demonstrated that presence can provide sites region, resulting an obvious increase capacity. Moreover, pore‐filling intercalation mechanism revealed by situ Raman spectroscopy ex transmission electron microscopy (TEM). It worth noting induced not accompanied a decrease initial coulombic efficiency (ICE), due to fact introduction pores does contact area between electrode electrolyte. This work presents novel concepts structural design provides valuable insights into effective utilization SIBs.

Язык: Английский

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Angstrom‐Level Ionic Sieve 2D‐MOF Membrane for High Power Aqueous Zinc Anode

Advanced Functional Materials, Год журнала: 2023, Номер 33(28)

Опубликована: Апрель 3, 2023

Abstract Aqueous Zn‐ion energy‐storage deviceswith metal Zn as anodes, including batteries and capacitors (ZIBs ZICs), is largely hindered by dendritic growth low coulombic efficiency since the side reactions between anodes electrolyte, originating fromthat targeted efficient isolation of H 2 O SO 4 2− extremely challenging. Herein, inspired density functional theory (DFT) that 2D angstrom level metal‐organic framework(2D‐MOF) highly selective for passage ions, simultaneously excluding H2O but allowing + conduction. Moreover, 2D‐MOF exhibits better mechanical strength compared with 3D‐MOF, which more conducive to inhibit dendrite growth. Impressively, benefiting from 2D‐MOFlayer, symmetric cells survived up 2000 h at mA cm −2 ,near 20‐times bare anodes. Coupling it cathode ZICs ZIBs, excellent electrochemical performances are presented. Importantly, Na ionic sieve membrane also deliver small polarization outstanding performance, indicating this study provides an strategy develop long‐life anode.

Язык: 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, Год журнала: 2023, Номер 62(45)

Опубликована: Сен. 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.

Язык: Английский

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Effectively Modulating Oxygen Vacancies in Flower-Like δ-MnO2 Nanostructures for Large Capacity and High-Rate Zinc-Ion Storage

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Окт. 7, 2023

In recent years, manganese-based oxides as an advanced class of cathode materials for zinc-ion batteries (ZIBs) have attracted a great deal attentions from numerous researchers. However, their slow reaction kinetics, limited active sites and poor electrical conductivity inevitably give rise to the severe performance degradation. To solve these problems, herein, we introduce abundant oxygen vacancies into flower-like δ-MnO2 nanostructure effectively modulate vacancy defects reach optimal level (δ-MnO2-x-2.0). The smart design intrinsically tunes electronic structure, guarantees ion chemisorption-desorption equilibrium increases electroactive sites, which not only accelerates charge transfer rate during processes, but also endows more redox reactions, verified by first-principle calculations. These merits can help fabricated δ-MnO2-x-2.0 present large specific capacity 551.8 mAh g-1 at 0.5 A g-1, high-rate capability 262.2 10 excellent cycle lifespan (83% retention after 1500 cycles), is far superior those other metal compound cathodes. addition, charge/discharge mechanism has been elaborated through ex situ techniques. This work opens up new pathway constructing next-generation high-performance ZIBs materials.

Язык: Английский

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