All‐Round Ionic Liquids for Shuttle‐Free Zinc‐Iodine Battery

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(8)

Опубликована: Янв. 5, 2024

Abstract The practical implementation of aqueous zinc‐iodine batteries (ZIBs) is hindered by the rampant Zn dendrites growth, parasite corrosion, and polyiodide shuttling. In this work, ionic liquid EMIM[OAc] employed as an all‐round solution to mitigate challenges on both anode iodine cathode side. First, EMIM + embedded lean‐water inner Helmholtz plane (IHP) inert solvation sheath modulated OAc − effectively repels H 2 O molecules away from surface. preferential adsorption metal facilitates uniform nucleation via a steric hindrance effect. Second, can reduce shuttling hindering dissolution forming ‐I 3 dominated phase. These effects holistically enhance cycle life, which manifested || symmetric cells Zn‐I full cells. ZIBs with EAc deliver capacity decay rate merely 0.01 ‰ per after over 18,000 cycles at 4 A g −1 , lower self‐discharge better calendar life than without additive.

Язык: Английский

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Robust bilayer solid electrolyte interphase for Zn electrode with high utilization and efficiency

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Сен. 29, 2024

Язык: Английский

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Constructing 3D Crosslinked Macromolecular Networks as a Highly Efficient Interface Layer for Ultra‐Stable Zn Metal Anodes

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 20, 2024

Aqueous zinc ion batteries (AZIBs) are experiencing rapid development due to their high theoretical capacity, abundant resources, and intrinsic safety. However, the progress of AZIBs is hindered by uncontrollable parasitic reactions excessive dendrite growth, which compromise durability effective utilization metal anodes. To address these challenges, study has constructed a 3D crosslinked macromolecular network composed ion-bonded potato starch (StZ) as an interface layer on Zn foil (StZ-Zn) inhibit hydrogen evolution, regulate

Язык: Английский

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Bidentate Coordination Structure Facilitates High‐Voltage and High‐Utilization Aqueous Zn‐I2 Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Июнь 13, 2024

Abstract The aqueous zinc‐iodine battery is a promising energy storage device, but the conventional two‐electron reaction potential and density of iodine cathode are far from meeting practical application requirements. Given that rich in redox reactions, activating high‐valence has become research direction for developing high‐voltage batteries. In this work, by designing multifunctional electrolyte additive trimethylamine hydrochloride (TAH), stable four‐electron‐transfer I − /I 2 + reactions with high theoretical specific capacity achieved through unique amine group, Cl bidentate coordination structure (TA)ICl. Characterization techniques such as synchrotron radiation, situ Raman spectra, DFT calculations used to verify mechanism structure. This stabilizes zinc anode promoting desolvation process shielding mechanism, enabling cycle steadily at maximum areal 57 mAh cm −2 97 % utilization rate. Finally, Zn−I full cell achieves 5000 cycles an N/P ratio 2.5. contributes further development

Язык: Английский

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Self‐Assembled Layer of Organic Phosphonic Acid Enables Highly Stable MnO2 Cathode for Aqueous Znic Batteries

Small, Год журнала: 2024, Номер 20(24)

Опубликована: Янв. 4, 2024

Abstract Manganese dioxide (MnO 2 ) is an attractive cathode material for aqueous zinc batteries (AZBs) owing to its environmental benignity, low cost, high operating voltage, and theoretical capacity. However, the severe dissolution of Mn 2+ leads rapid capacity decay. Herein, a self‐assembled layer amino‐propyl phosphonic acid (AEPA) on MnO surface, which significantly improves cycle performance successfully modified. Specifically, AEPA can be firmly attached through strong chemical bond, forming hydrophobic, uniform organic coating with few nanometers thickness. This inhibit by avoiding direct contact between electrolyte cathode, thus enhancing structural integrity redox reversibility . As result, @AEPA achieves reversible 223 mAh g −1 at 0.5 A retention 97% after 1700 cycles 1 work provides new insights in developing stable Mn‐based cathodes batteries.

Язык: Английский

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Superfast Zincophilic Ion Conductor Enables Rapid Interfacial Desolvation Kinetics for Low‐Temperature Zinc Metal Batteries

Advanced Science, Год журнала: 2024, Номер 11(28)

Опубликована: Май 9, 2024

Abstract Low‐temperature rechargeable aqueous zinc metal batteries (AZMBs) as highly promising candidates for energy storage are largely hindered by huge desolvation barriers and depressive Zn 2+ migration kinetics. In this work, a superfast zincophilic ion conductor of layered silicate nanosheet (LZS) is constructed on metallic surface, an artificial layer diffusion accelerator. The experimental simulation results reveal the ability structure LZS not only promote kinetics [Zn(H 2 O) 6 ] but also accelerate transport across anode/electrolyte interface, guiding uniform deposition. Benefiting from these features, LZS‐modified anodes showcase long‐time stability (over 3300 h) high Coulombic efficiency with ≈99.8% at mA cm −2 , respectively. Even reducing environment temperature down to 0 °C, ultralong cycling up 3600 h distinguished rate performance realized. Consequently, assembled Zn@LZS//V O 5‐x full cells deliver superior cyclic (344.5 mAh g −1 after 200 cycles 1 A ) capability (285.3 10 together low self‐discharge rate, highlighting bright future low‐temperature AZMBs.

Язык: Английский

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Highly Stable Aqueous Zn‐Ion Batteries Achieved by Suppressing the Active Component Loss in Vanadium‐Based Cathode

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 4, 2024

Abstract Aqueous zinc–ion batteries (AZIBs) hold significant promise for large‐scale energy storage due to their inherent safety and environmental benefits. However, practical application is often limited by rapid capacity loss from the dissolution of active cathode materials. Here, an effective strategy proposed suppress component doping high‐valence Sn 4+ in V 3 O 7 ·H 2 (Sn–V O) material achieve highly stable AZIBs. An impressive retention 89.3% over 6000 cycles at 5.0 A g −1 a high specific 408 mAh 0.1 are attained. The thermodynamically lowers formation Sn–V increases VO + ions, thereby reinforcing structural stability suppressing vanadium dissolution. Besides, enhances electrical conductivity broadens Zn 2+ diffusion channels, significantly accelerating intercalation deintercalation kinetics. experimental results integrated with mechanism analysis density functional theory calculation elucidate dynamics V‐based cathodes, employ X‐ray absorption spectroscopy reveal local electronic structures chemical valences during charge/discharge processes, providing comprehensive insights into high‐performance materials

Язык: Английский

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Comprehensive Understanding of Steric‐Hindrance Effect on the Trade‐Off Between Zinc Ions Transfer and Reduction Kinetics to Enable Highly Reversible and Stable Zn Anodes

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 21, 2024

Abstract The electrode interface concentration polarization attributed to the contradiction between sluggish mass transfer process and rapid electrochemical reduction kinetics significantly restricts practical application of Zn anode. Creating a moderate ions chemistry is essential for durable zinc‐ion batteries. In this work, trade‐off effect realized by selecting large‐size 4‐Aminomethyl cyclohexanecarboxylic acid (AMCA) molecule as electrolyte additive. Intriguingly, AMCA molecules reorganize 2+ solvation structure via robust coordination with reconstruct H‐bond networks, giving pulled desolvation process. Meanwhile, enlarges size push force, confining kinetics. balanced chemical environment maintained pull‐push interplay. Besides, can anchor on zinc surface create water‐poor microenvironment, fostering homogeneous (002) deposition effectively restricting water‐induced side‐reactions. Notably, Zn||Zn symmetric cell operates stably over 167 days at 20 mA cm −2 . Moreover, Zn||VOX full employed ensures outstanding capacity retention 99.15% after 590 cycles 2 A g −1 , even low N/P (4.3), lean (50 µL mAh ) ultrathin foil 10 µm. This work reveals unique insights into interfacial design toward high‐performance

Язык: Английский

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Resolving the Zincophilicity‐Desolvation Dilemma of Electrolyte Additives via Molecular Engineering for Achieving High‐Rate Zinc Anodes with Minimized Polarization

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

Abstract Zincophilic additives have been widely applied to stabilize Zn metal anodes owing their efficacy in regulating 2+ diffusion. However, high zincophilicity causes elevated desolvation barriers, contributing increased polarization and reduced stability, particularly under high‐current conditions. Herein, a novel molecular engineering approach is proposed that integrates steric hindrance H‐bond interactions promote the of zincophilic additives, thereby achieving high‐rate with minimized polarization. As proof‐of‐concept, N,N‐di‐(2‐picolyl)ethylenediamine (NDPA), additive comprising potent chelating sites polar amino tail group designed. NDPA boasts four solvation sites, which not only contribute exceptional zincophilicity, effectively diffusion but also exhibit significant hindrance, reducing number H₂O molecules, lowering dehydration energy. Additionally, NDPA's free groups form H‐bonds facilitating dissociation coordinated additives. Consequently, at current density 20 mA cm −2 , addition Zn||Zn symmetric cell improves lifespan from 37 h over 2000 reduces voltage 137 82 mV. This work presents strategy overcome zincophilicity‐desolvation dilemma electrolyte for developing durable zinc anodes.

Язык: Английский

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Self-assembled monolayer boosts the air-stability and electrochemical reversibility of O3-type layered oxides for sodium-ion batteries

Journal of Materials Chemistry A, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

This study develops a self-assembled, hydrophobic, and compact C 32 H 67 O 4 P layer on O3-NaNi 0.33 Fe Mn 2 cathode, effectively shielding the electrode from air degradation metal dissolution, thereby enhancing sodium-ion battery performance.

Язык: Английский

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