Electrolyte design for aqueous Zn batteries

Joule, Год журнала: 2025, Номер unknown, С. 101844 - 101844

Опубликована: Фев. 1, 2025

Context & scaleZn-based batteries with aqueous electrolytes are garnering great interest as the most promising next-generation due to their intrinsic high safety, low cost, and environmental friendliness. However, short cycle life of Zn battery, originating from reversibility metal electrode, is far satisfactory. To achieve tackling water decomposition reaction inhomogeneous deposition/dissolution crucial. We present design principles for co-solvent suggest a new parameter accurately selecting beneficial organic molecules Zn-based batteries. Electrolytes prepared using this principle effectively overcome challenges in systems demonstrate record-high cycling stability. This work provides insight into electrolyte systems.Highlights•Thorough suggested batteries•An effective descriptor discovered•Designed stability batteriesSummaryPolarity scales often used descriptors battery (AZB) electrolytes. failure predict solvation Zn2+ raises questions about applicability designing high-performance AZB Here, Dimroth Richardt's Et(30) polarity scale introduced an guideline screening molecules. A clear volcanic correlation demonstrated between Coulombic efficiency (CE). common consensus formula, which typically uses highly polar improve CE, indicates that roles beyond altering structure critical obtaining performances. Based on scale, designed achieves average CE (99.8%), exceptionally long (5,500 h), specific energy (110 Wh kg−1). offers general frameworks electrolytes.Graphical abstract

Язык: Английский

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Regulation of Ion Transport Behavior in Layer‐by‐Layer Assembled Polymer/MXene Heterostructure Anodes for Metal‐Free Aqueous Zinc Ion Batteries

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

Abstract Recently, the development of Zn‐host materials in metal‐free aqueous Zinc ion batteries (AZIBs) has emerged as an effective strategy to address challenges uncontrollable dendrite growth and severe corrosion Zn anodes. Herein, layer‐by‐layer assembly conjugated polyimide nanocomposite (PTN‐MXene) through situ polymerization is proposed realize high energy density stability AZIBs. Specifically, unique layered structure abundant redox centers diketone‐based (PTN), combined with its structural compatibility MXene, enable formation a assembled 2D/2D heterostructure. This design ensures sufficient contact expands interlayer spacing facilitating faster electron/ion transport kinetics providing better access centers. Importantly, regulation behavior from H + or 2+ /Zn coinsertion PTN‐MXene achieved verified by different characterization techniques. Thus, anode exhibits specific capacity (283.4 mAh g −1 at 0.1 A ), excellent rate performance outstanding cycling performance. As proof‐of‐concept, full fabricated Prussian blue analogs cathode deliver 72.4 Wh kg exceptional over 2000 cycles.

Язык: Английский

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All‐Climate Energy‐Dense Cascade Aqueous Zn‐I₂ Batteries Enabled by a Polycationic Hydrogel Electrolyte

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 16, 2025

Abstract The practical development of aqueous zinc‐iodine (Zn‐I 2 ) batteries is greatly hindered by the low energy density resulting from conventional I 0 /I − conversion and limited temperature tolerance. Here, a temperature‐insensitive polycationic hydrogel electrolyte borax‐bacterial cellulose / p (AM‐ co ‐VBIMBr) (denoted as BAVBr) for achieving an energy‐dense cascade Zn‐I battery over wide range −50 to 50 °C designed. A comprehensive investigation, combining advanced spectroscopic investigation DFT calculations, has revealed that presence Br species in gel facilitates reaction /Br . Simultaneously, it activates high voltage + redox through interhalogen formation. Consequently, sequential highly reversible reactions involving , are achieved with assistance −NR 3 units BAVBr, effectively suppressing hydrolysis electrolyte. lead area capacity 0.76 mAh cm −2 at loading 1 mg or 760 g −1 based on mass iodine, demonstrating exceptional long‐term cycling stability °C. This study offers valuable insights into rational design electrolytes high‐energy batteries, specifically tailored wide‐temperature operation.

Язык: Английский

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High‐Energy‐Density Aqueous Zinc‐Ion Batteries: Recent Progress, Design Strategies, Challenges, and Perspectives

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Abstract Aqueous zinc‐ion batteries (AZIBs) are emerging as a promising energy storage technique supplementary to Li‐ion batteries, attracting much research attention owing their intrinsic safety, cost economy, and environmental friendliness. However, densities for AZIBs still do not fulfill practical requirements because of the low specific areal capacity, limited working potential, excessive negative‐to‐positive electrode capacity (N/P) ratio. In this review, comprehensive overview basic major challenges achieving high‐energy‐density is provided. Following that, recent progress in optimization each component overall configuration summarized, crucial design principles discussed. Apart from conventional emphasis on part, especially cathode materials, separately, discussion about synergistic interactions among all components conducted. Finally, outlook direction given provide valuable guidance further holistic development aqueous batteries.

Язык: Английский

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Zinc-ion batteries at elevated temperatures: linking material design to wearable/biocompatible applications

Advanced Composites and Hybrid Materials, Год журнала: 2025, Номер 8(1)

Опубликована: Янв. 17, 2025

Язык: Английский

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Regulating Water Activity and Solvation Structure via Zwitterion‐Enhanced Polymer Electrolyte for Long‐Life Zn‐Ion Hybrid Capacitors with Low‐Temperature Applicability

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 2, 2024

Abstract The development of aqueous Zn‐based energy storage systems is plagued by poor cyclability and limited operating temperatures caused Zn anode issues highly active water. Herein, a frost‐tolerant hydrogel electrolyte (PABCHE) promoted hydroxyl‐rich β‐cyclodextrin (β‐CD) zwitterionic betaine (BA) additives fabricated in situ to protect anodes enhance low‐temperature adaptability. Both synergistically disrupt the hydrogen‐bonding network between water molecules remarkably reduce freezing point PABCHE alleviate water‐associated side effects. Zwitterionic BA constructs ion‐migration channels regulate 2+ solvation structure, promoting uniform rapid transport . Additionally, renders homoepitaxially depositing along (002) plane achieve dendrite‐free anodes. As result, versatile enables Zn//Zn cells cycle stably for 1100 3600 h at 20 −20 °C, respectively. Furthermore, Zn‐ion hybrid capacitors optimized deliver favorable over 30000 cycles °C (with capacity retention 81.8%) 84.2%). can be applied as flexible strain sensor real‐time monitoring physiological activities. This work offers valuable insights developing antifreeze electrolytes toward applications devices sensors.

Язык: Английский

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In‐Situ Construction of Solid Electrolyte Interphases with Gradient Zincophilicity for Wide Temperature Zinc Ion Batteries

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 9, 2024

Abstract Dendrite growth and parasitic side reactions on zinc (Zn) metal anode are major challenges limiting the practical application of aqueous ion batteries (AZIBs), particularly under wide temperatures conditions. This study proposes a novel hydrated deep eutectic solvent based electrolyte by using ethylene glycol (EG) SnI 4 , enabling AZIBs to achieve excellent cycling life from −30 60 °C. Spectroscopic characterizations reveal H 2 O molecules effectively confined within network due dual effects Zn 2+ coordination EG hydrogen bonding, thereby weakening free water activity broadening electrochemical window. Furthermore, resulting dissociation‐reduction an organic‐inorganic hybridized solid interphase (SEI) layer is formed surface with zincophile gradient, this gradient SEI inhibits evolution regulates oriented deposition. The Zn//Zn symmetric cell utilizing achieves remarkable stability over 7800 h at room temperature, 6000 °C, 2500 work provides insights into new approach formation mechanism anode, which demonstrates significant potential for developing high

Язык: Английский

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Functionalized Quasi‐Solid‐State Electrolytes in Aqueous Zn‐Ion Batteries for Flexible Devices: Challenges and Strategies

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 28, 2024

Abstract The rapid development of wearable and intelligent flexible devices has posed strict requirements for power sources, including excellent mechanical strength, inherent safety, high energy density, eco‐friendliness. Zn‐ion batteries with aqueous quasi‐solid‐state electrolytes (AQSSEs) various functional groups that contain electronegative atoms (O/N/F) tunable electron accumulation states are considered as a promising candidate to the tremendous progress been achieved in this prospering area. Herein, review proposes comprehensive summary recent achievements using AQSSE by focusing on significance different groups. fundamentals challenges ZIBs introduced from chemical view first place. Then, mechanism behind stabilization functionalized is summarized explained detail. Then regarding enhanced electrochemical stability classified based polymer chain. advanced characterization methods briefly following sections. Last but not least, current future perspectives area provided authors' point view.

Язык: Английский

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A novel water-reducer-based hydrogel electrolyte for robust and flexible Zn-I2 battery

Energy storage materials, Год журнала: 2024, Номер unknown, С. 103981 - 103981

Опубликована: Дек. 1, 2024

Язык: Английский

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Supramolecular Interface Buffer Layer for Stable Zinc Anode

Small Methods, Год журнала: 2025, Номер unknown

Опубликована: Янв. 19, 2025

Abstract The aqueous zinc ion batteries (AZIBs) are chronically plagued by the inevitable side‐reaction and uneven Zn planets stack. Through regulating water activity 2+ crystal dynamics could effectively relieve those anode/electrolyte interface problems. (2‐hydroxypropyl)‐β‐cyclodextrin (HBCD), characterized excluded‐volume mitigating zinc‐flux aggregation effect, is chosen as electrolyte additive to tail interface. In this work, supermolecule buffer layer conducted screen active modulate crystallography. Capitalized on intense electron density of exterior cavity, HBCD molecules proven chemically adsorb onto anode, which sterically repulse waters disrupt H‐bonds among waters. Concurrently, (002)‐preferred texture achieved through inducing ions transport nucleation. assembled symmetric Zn//Zn show ameliorated lifespan at various current (350 h for 10 mA cm −2 /10 mAh 100 20 /20 ) steady operation 73.26% high Depth Discharge (DOD). Zn//NVO deliver 380.4 g −1 discharge capacity 1 A . To prove feasibility, full battery with a low N/P ratio (2.16) assembled, it shows ≈260 runs stably during 500 cycles.

Язык: Английский

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