Aqueous Zinc‐Iodine Batteries: From Electrochemistry to Energy Storage Mechanism

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(41)

Published: Sept. 1, 2023

Abstract As one of the most appealing energy storage technologies, aqueous zinc‐iodine batteries still suffer severe problems such as low density, slow iodine conversion kinetics, and polyiodide shuttle. This review summarizes recent development Zn─I 2 with a focus on electrochemistry underlying working mechanism. Starting from fundamentals batteries, zinc anode, well scientific existing in are introduced. The concrete strategies dealing cathode, electrolyte, separator challenges confronting elaborated well. To deepen understanding important findings mechanism different summarized detail. Finally, some guidelines directions for also provided. is expected to battery promote their practical applications future.

Language: Английский

---

Design Strategies for Aqueous Zinc Metal Batteries with High Zinc Utilization: From Metal Anodes to Anode-Free Structures

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Jan. 4, 2024

Aqueous zinc metal batteries (AZMBs) are promising candidates for next-generation energy storage due to the excellent safety, environmental friendliness, natural abundance, high theoretical specific capacity, and low redox potential of (Zn) metal. However, several issues such as dendrite formation, hydrogen evolution, corrosion, passivation Zn anodes cause irreversible loss active materials. To solve these issues, researchers often use large amounts excess ensure a continuous supply materials anodes. This leads ultralow utilization squanders density AZMBs. Herein, design strategies AZMBs with discussed in depth, from utilizing thinner foils constructing anode-free structures 100%, which provides comprehensive guidelines further research. Representative methods calculating depth discharge different first summarized. The reasonable modification foil anodes, current collectors pre-deposited Zn, aqueous (AF-AZMBs) improve then detailed. In particular, working mechanism AF-AZMBs is systematically introduced. Finally, challenges perspectives high-utilization presented.

Language: Английский

---

Electrolyte Engineering via Competitive Solvation Structures for Developing Longevous Zinc Ion Batteries

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(48)

Published: Nov. 7, 2023

Abstract Aqueous zinc ion batteries (ZIBs) are troubled by the severe Zn dendrite growth and side reactions, manifesting as low coulombic efficiency poor cyclic stability. Electrolyte engineering is regarded an efficient method to improve metal reversibility. Herein, a distinctive electrolyte regulation strategy demonstrated for long‐lasting ZIBs through construction of competitive solvation structures. In composite aqueous system, insoluble LiNO 3 in dimethyl carbonate (DMC) introduced outwit active water dissociation from 2+ coordination environment, organic/anion‐enriched structure enables formation stable interface effectively restrain adverse reactions. Distinctly, anode exhibits inhibited with high reversibility plating/stripping processes over 1600 h exceptional cumulative capacity 16 Ah cm −2 , ultra‐long lifespan high‐temperature (50 °C), discharge depth (65%). Furthermore, || V 2 O 5 full battery can operate stably 1000 cycles at 1 A g −1 . This work points direction solve major challenges collaborative regulated environment interfacial chemistry.

Language: Английский

---

Molecular engineering of self-assembled monolayers for highly utilized Zn anodes

eScience, Journal Year: 2023, Volume and Issue: 4(2), P. 100205 - 100205

Published: Oct. 19, 2023

Stabilizing the Zn anode under high utilization rates is highly applauded yet very challenging in aqueous batteries. Here, we rationally design a zincophilic short-chain aromatic molecule, 4-mercaptopyridine (4Mpy), to construct self-assembled monolayers (SAMs) on copper substrate achieve utilized anodes. We reveal that 4Mpy could be firmly bound Cu via Cu−S bond form compact and uniform SAMs, which effectively isolate water electrode surface thus eliminate water-related side reactions. In addition, ring structure of not only ensure ordered arrangement pyridine N but also facilitate charge transfer, enabling rapid deposition. Consequently, Zn/4Mpy/Cu enables symmetric cell stably cycle for over 180 h at 10 mA cm−2 depth-of-discharge 90%, allows MnO2-paired pouch survive 100 cycles rate 78.8%. An anode-free 4Mpy/Cu||graphite operates 150 without obvious capacity fading 0.1 A g−1. This control interfacial chemistry SAMs metal anodes provides new paradigm developing high-energy metal-based

Language: Английский

---

Atomically Coupled 2D MnO₂/MXene Superlattices for Ultrastable and Fast Aqueous Zinc-Ion Batteries

ACS Nano, Journal Year: 2023, Volume and Issue: 17(21), P. 21761 - 21770

Published: Oct. 27, 2023

The delta manganese dioxide (δ-MnO2) has sparked a great deal of scientific research for application as the cathode in aqueous zinc-ion batteries (AZIBs) owing to its characteristic layered structure. However, further development and commercial δ-MnO2 are hindered by low rate performance poor cycling stability, which derived from inherently electrical conductivity structural instability during charge/discharge process. Herein, we report fabrication 2D MnO2/MXene superlattice solution-phase assembly unilamellar MnO2 Ti3C2Tx MXene nanosheets, where nanosheet is separated stabilized between nanosheets. nanosheets can not only serve stabilizers isolate prevent them aggregating but also act conductive contributors strengthen conductivity, thus maintaining overall stability realizing rapid electron transport. Additionally, regular stacking with repeating periodicity lead highly exposed active sites, promoting ion diffusion. As consequence, large specific capacity 315.1 mAh g–1 at 0.2 A g–1, prominent 149.8 5 excellent long-term after 5000 cycles 88.1% retention obtained AZIBs. Meanwhile, superior H+/Zn2+ diffusion kinetics desirable pseudocapacitive behaviors elucidated electrochemical measurements density functional theory computations. This study provides an advanced perspective innovation oxide-based materials

Language: Английский

---

Backside Coating for Stable Zn Anode with High Utilization Rate

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(26)

Published: Feb. 13, 2024

Abstract Stable Zn anodes with high utilization rate are urgently required to promote the specific and volumetric energy densities of Zn‐ion batteries for practical applications. Herein, contrary widely utilized surface coating on anodes, this work shows that a zinc foil backside coated layer delivers much enhanced cycling stability even under depth discharge. The significantly reduces stress concentration, accelerates heat diffusion, facilitates electron transfer, thus effectively preventing dendrite growth structural damage at utilization. As result, developed anode can be stably cycled 334 h 85.5% utilization, which outperforms bare previously reported results surface‐coated foils. An NVO‐based full cell also stable performance (69.4%), low negative‐positive electrodes ratio (1.44), specific/volumetric (155.8 Wh kg −1 /178 L ), progress toward zinc‐ion batteries.

Language: Английский

---

Advancements in Aqueous Zinc-Iodine Batteries: A Review

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

This review provides an update on various strategies and perspectives for the development of aqueous zinc–iodine batteries, with a particular emphasis regulation I 2 cathodes Zn anodes, electrolyte formulation separator modification.

Language: Английский

---

Shear-flow induced alignment of graphene enables the closest packing crystallography of the (002) textured zinc metal anode with high reversibility

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(9), P. 3168 - 3178

Published: Jan. 1, 2024

A meter-grade graphene-modified copper collector (Cu@G) was prepared using a shear-flow induced method. Cu@G enables the closest packing crystallography of (002) textured Zn metal anode with excellent plating/stripping reversibility.

Language: Английский

---

Facile Electrolytic (111)‐Textured Copper Foil for Dendrite‐Free Zinc Metal Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 29, 2024

Abstract Aqueous Zn metal batteries are emerging as a promising candidate for the next‐generation largescale energy storage system due to their high safety, low lost, and eco‐friendliness. Nevertheless, practical application is restricted by uncontrollable dendrite growth limited utilization of anode. Herein, room temperature electrodeposition strategy based on an optimized rate relationship between diffusion consumption Cu 2+ prepare (111)‐textured current collector construction dendrite‐free anode with reversibility developed. Attributed lattice match (002) facet (111) Cu, deposition along its [001] orientation achieved Cu. The facets horizontally aligned endow planar superior corrosion resistance, resulting in long life‐span over 2186 cycles. Impressively, resultant anodes can stabilize operation pouch cells extremely demanding negative‐to‐positive capacity ratio 2. This work provides new avenue development collectors low‐cost sustainable storage.

Language: Английский

---

Nanodiamond Implanted Zinc Metal Anode for Long‐Life Aqueous Zinc Ion Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(25)

Published: Feb. 21, 2024

Abstract The practical application of aqueous zinc ion batteries is greatly hindered by the severe dendrite growth and side reactions on Zn metal anode. To address these challenges, nanodiamond (ND) particles are implanted foil surface a straightforward mechanical rolling process, which serves as heterogeneous seeds, enhancing cycling stability ND with carboxyl groups facilitate even distribution electric fields 2+ ions in their vicinity, promotes homogeneous deposition Zn. Moreover, excellent corrosion resistance alleviates electrode, thus effectively protecting anode electrolyte. Benefited from advantages, ND@Zn shows over 4100 h reversible cycles symmetric cells, 99.7% Coulombic efficiency asymmetric cells. ND@Zn||MnO 2 full cell achieves stable life 1000 87.0% capacity retention at 1 A g −1 current density. This cost‐effective fabrication process holds potential for scalability, making it amenable to large‐scale production anodes.

Language: Английский

---