A Double‐Charged Organic Molecule Additive to Customize Electric Double Layer for Super‐Stable and Deep‐Rechargeable Zn Metal Pouch Batteries

Advanced Functional Materials, Год журнала: 2023, Номер 34(8)

Опубликована: Ноя. 12, 2023

Abstract The electrochemical performance of aqueous zinc metal batteries (AZMBs) is highly dependent on the electric double layer (EDL) properties at Zn electrode/electrolyte interface. Herein, a novel reconfigured EDL constructed via double‐charged theanine (TN) additive for super‐stable and deep‐rechargeable AZMBs. Experiments theoretical computations unravel that positively charged TN not only serves as preferential anchor to form water‐poor Helmholtz plane onto anode, but also its anionic end could coordinate with 2+ tailor solvation structure in diffusion further reconstruct inner H‐bonds networks, thus effectively guiding uniform deposition suppressing water‐induced side reactions. Consequently, Zn//Zn cells acquire outstanding cycling stabilities nearly 800 h high depth discharge 80%. Moreover, Zn//VOX full deliver substantial capacity retention (94.12% after 1400 cycles 2 A g −1 ) under practical conditions. Importantly, designed 2.7 Ah pouch cell harvests recorded energy density 42.3 Wh Kg 79.5 L –1 , remarkable 85.93% 220 50 mA . This innovative design concept reshape chemistry would inject fresh vitality into developing advanced AZMBs beyond.

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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Tetraphenylporphyrin‐based Chelating Ligand Additive as a Molecular Sieving Interfacial Barrier toward Durable Aqueous Zinc Metal Batteries

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(46)

Опубликована: Сен. 29, 2023

The sustained water consumption and uncontrollable dendrite growth strongly hamper the practical applications of rechargeable zinc (Zn) metal batteries (ZMBs). Herein, for first time, we demonstrate that trace amount chelate ligand additive can serve as a "molecular sieve-like" interfacial barrier achieve highly efficient Zn plating/stripping. As verified by theoretical modeling experimental investigations, benzenesulfonic acid groups on molecular not only facilitates its solubility selective adsorption anode, but also effectively accelerates de-solvation kinetics Zn2+ . Meanwhile, central porphyrin ring expels free molecules from via chemical binding against hydrogen evolution, reversibly releases captured to endow dendrite-free deposition. By virtue this non-consumable additive, high average plating/stripping efficiency 99.7 % over 2100 cycles together with extended lifespan suppressed decomposition in Zn||MnO2 full battery were achieved, thus opening new avenue developing durable ZMBs.

Язык: Английский

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Steric‐hindrance Effect Tuned Ion Solvation Enabling High Performance Aqueous Zinc Ion Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(21)

Опубликована: Март 12, 2024

Despite many additives have been reported for aqueous zinc ion batteries, steric-hindrance effect of and its correlation with Zn

Язык: Английский

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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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Polymer Molecules Adsorption‐Induced Zincophilic‐Hydrophobic Protective Layer Enables Highly Stable Zn Metal Anodes

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 5, 2024

Zn metal, as one of the most promising anode materials for aqueous batteries, suffers from uncontrollable dendrite growth and water-induced parasitic reactions, which drastically compromise its cycle life Coulombic efficiency (CE). Herein, a nonionic amphipathic additive Tween-20 (TW20) is proposed that bears both zincophilic hydrophobic units. The segment TW20 preferentially adsorbs on anode, while exposed electrolyte side, forming an electrolyte-facing layer shields active water molecules. Moreover, theoretical calculation experimental results reveal can induce preferential (002) plane by adsorbing other facets, enabling dendrite-free anodes. Benefitting these advantages, stability reversibility anodes are substantially improved, reflected stable cycling over 2500 h at 1.0 mA cm

Язык: Английский

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Bio‐Inspired Trace Hydroxyl‐Rich Electrolyte Additives for High‐Rate and Stable Zn‐Ion Batteries at Low Temperatures

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(9)

Опубликована: Янв. 5, 2024

High-rate and stable Zn-ion batteries working at low temperatures are highly desirable for practical applications, but challenged by sluggish kinetics severe corrosion. Herein, inspired frost-resistant plants, we report trace hydroxyl-rich electrolyte additives that implement a dual remodeling effect high-performance low-temperature batteries. The additive with high Zn absorbability not only remodels

Язык: Английский

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Global “Interface‐Space” Dual‐Modulation by Functional Supramolecules Organic Frameworks on Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, Год журнала: 2023, Номер 34(10)

Опубликована: Ноя. 21, 2023

Abstract The uneven zinc‐ion flux and interfacial contact between the anode electrolyte trigger malignant dendrites byproducts, significantly hindering practical application of zinc‐metal batteries. Herein, a H‐bonded supramolecular organic framework (HSOF) is proposed to help regulate Zn 2+ stabilize chemistry. self‐assembled supermolecule structures by in‐plane H‐bond networks firmly trap water molecules assist de‐solvation block corrosion. abundant polar groups provide strong guidance for distribution, ensuring homogeneous, rapid ion transport‐deposition kinetics. Meanwhile, π – stacked space‐layout structure affords preferred Zn(002) plane stacking smooth flat growth. Benefiting from these advantages, HSOFs are employed on surface adjustment separator decoration spatial manipulation, successfully realizing an overall “interface‐space” dual‐regulation effect. It delivers over 3000 h HSOF@Zn in symmetric cell up 5000 HSOF‐decorated Zn||Zn cell, respectively. HSOF@Zn||V 2 O 5 full with demonstrates enhanced capacity retention 92.7% after 2500 cycles at A g −1 . can be easily scaled into pouch which still has rate 94% 1000 cycles.

Язык: Английский

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Zincophilic Anionic Hydrogel Electrolyte with Interfacial Specific Adsorption of Solvation Structures for Durable Zinc Ion Hybrid Supercapacitors

Advanced Functional Materials, Год журнала: 2023, Номер 34(2)

Опубликована: Сен. 27, 2023

Abstract The rechargeable zinc ion hybrid supercapacitors (ZHSCs) are critically hindered by the low Coulombic efficiency and poor lifespan due to continuous water‐induced side reactions uncontrolled dendrite growth of Zn anode. Herein, a zincophilic anionic hydrogel electrolyte (PSCA/Zn(OTf) 2 ) is constructed incorporating dodecyl sulfate anions ((OSO 3 R) − micelles manipulate solvation structures 2+ cations via moderate ion–ion coordination interactions for manipulating deposition behavior interfacial chemistry on electrode. Joint experimental theoretical results show that solvated with ionized (OSO electron donor significantly restrict occurrence adverse (hydrogen evolution reactions). Concomitantly, newly involved influence adsorption configurations ions, which alter electrocrystallization patterns dendrite‐free induce oriented rapid reaction kinetics electrodes. As proof concept, Zn||Zn symmetric cells PSCA/Zn(OTf) exhibit high reversibility deposition/stripping an extended long cycle span. Significantly, benefiting from synergy modulatory environment regulated configurations, quasi‐solid‐state Zn||PSCA/Zn(OTf) ||N‐doped porous carbon material (NPC) ZHSC exhibits exceptional cycling stability over 40 000 cycles capacity decay (0.00027% per cycle).

Язык: Английский

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Glycine composed anode-electrolyte interphase induced Zn(002) deposition for highly reversible zinc anode

Chemical Engineering Journal, Год журнала: 2023, Номер 480, С. 148040 - 148040

Опубликована: Дек. 14, 2023

Язык: Английский

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