Polycation‐Regulated Electrolyte and Interfacial Electric Fields for Stable Zinc Metal Batteries

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(27)

Опубликована: Май 8, 2023

Zn metal as one of promising anode materials for aqueous batteries but suffers from disreputable dendrite growth, grievous hydrogen evolution and corrosion. Here, a polycation additive, polydiallyl dimethylammonium chloride (PDD), is introduced to achieve long-term highly reversible plating/stripping. Specifically, the PDD can simultaneously regulate electric fields electrolyte Zn/electrolyte interface improve Zn2+ migration behaviors guide dominant (002) deposition, which veritably detected by Zeta potential, Kelvin probe force microscopy scanning electrochemical microscopy. Moreover, also creates positive charge-rich protective outer layer N-rich hybrid inner layer, accelerates desolvation during plating process blocks direct contact between water molecules anode. Thereby, reversibility stability anodes are substantially improved, certified higher average coulombic efficiency 99.7 % Zn||Cu cells 22 times longer life Zn||Zn compared with that PDD-free electrolyte.

Язык: Английский

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Polyhydroxylated Organic Molecular Additives for Durable Aqueous Zinc Battery

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

Опубликована: Сен. 27, 2023

Abstract The large‐scale deployment of aqueous Zn‐ion batteries is hindered by Zn anode instability including surface corrosion, hydrogen gas evolution, and irregular deposition. To tackle these challenges, a polyhydroxylated organic molecular additive, trehalose, incorporated to refine the solvation structure promote planar Within regions involving hydroxy groups participate in reconstruction bond networks, which increases overpotential for water decomposition reaction. Moreover, at metal–molecule interface, chemisorption trehalose onto zinc enhances corrosion resistance facilitates deposition manner. optimized electrolyte significantly improves striping/plating reversibility maintains stable potentials over 1600 h 5 mA cm −2 with cutoff capacity 1 symmetric cells. When combined MnO 2 cathode, assembled coin cell retains ≈89% its after 1000 cycles. This molecule emphasizing role molecules fine‐tuning structures anode/electrolyte interfaces, holds promise enhancing various metal batteries.

Язык: Английский

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

Advanced Energy Materials, Год журнала: 2023, Номер 13(41)

Опубликована: Сен. 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.

Язык: Английский

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Improved Interfacial Ion Migration and Deposition through the Chain‐Liquid Synergistic Effect by a Carboxylated Hydrogel Electrolyte for Stable Zinc Metal Anodes

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(42)

Опубликована: Авг. 30, 2023

The large-scale applicability of Zn-metal anodes is severely impeded by the issues such as dendrite growth, complicated hydrogen evolution, and uncontrollable passivation reaction. Herein, a negatively charged carboxylated double-network hydrogel electrolyte (Gelatin/Sodium alginate-acetate, denoted Gel/SA-acetate) has been developed to stabilize interfacial electrochemistry, which restructures type Zn2+ ion solvent sheath optimized via chain-liquid synergistic effect. New bonds are reconstructed with water molecules zincophilic functional groups, directional migration hydrated ions therefore induced. Concomitantly, robust chemical bonding layers Zn slab exhibits desirable anti-catalytic effect, thereby greatly diminishing activity eliminating side reactions. Subsequently, symmetric cell using Gel/SA-acetate demonstrates reversible plating/stripping performance for 1580 h, an asymmetric reaches state-of-the-art runtime 5600 h high average Coulombic efficiency 99.9 %. resultant zinc hybrid capacitors deliver exceptional properties including capacity retention 98.5 % over 15000 cycles, energy density 236.8 Wh kg-1 , mechanical adaptability. This work expected pave new avenue development novel electrolytes towards safe stable anodes.

Язык: Английский

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Triple‐function Hydrated Eutectic Electrolyte for Enhanced Aqueous Zinc Batteries

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(40)

Опубликована: Авг. 14, 2023

Aqueous rechargeable zinc-ion batteries (ARZBs) are impeded by the mutual problems of unstable cathode, electrolyte parasitic reactions, and dendritic growth zinc (Zn) anode. Herein, a triple-functional strategy introducing tetramethylene sulfone (TMS) to form hydrated eutectic is reported ameliorate these issues. The activity H2 O inhibited reconstructing hydrogen bonds due strong interaction between TMS O. Meanwhile, preferentially adsorbed on Zn surface increases thickness double electric layer (EDL) structure, which provides shielding buffer suppress dendrite growth. Interestingly, modulates primary solvation shell Zn2+ ultimately achieve novel solvent co-intercalation ((Zn-TMS)2+ ) mechanism, intercalated works as "pillar" that more zincophilic sites stabilizes structure cathode (NH4 V4 O10 , (NVO)). Consequently, Zn||NVO battery exhibits remarkably high specific capacity 515.6 mAh g-1 at low current density 0.2 A for over 40 days. This multi-functional electrolytes mechanism will significantly propel practical development aqueous batteries.

Язык: Английский

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Guiding Zn Uniform Deposition with Polymer Additives for Long‐lasting and Highly Utilized Zn Metal Anodes

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(51)

Опубликована: Ноя. 6, 2023

The parasitic side reaction on Zn anode is the key issue which hinders development of aqueous Zn-based energy storage systems power-grid applications. Here, a polymer additive (PMCNA) engineered by copolymerizing 2-methacryloyloxyethyl phosphorylcholine (MPC) and N-acryloyl glycinamide (NAGA) was employed to regulate deposition environment for satisfying inhibition performance during long-term cycling with high utilization. PMCNA can preferentially adsorb metal surface form uniform protective layer effective water molecule repelling resistance. In addition, guide nucleation along 002 plane further dendrite suppression. Consequently, enable Zn//Zn battery an ultrahigh depth discharge (DOD) 90.0 % over 420 h, Zn//active carbon (AC) capacitor long lifespan, Zn//PANI utilization 51.3 at low N/P ratio 2.6.

Язык: Английский

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Zn-based batteries for sustainable energy storage: strategies and mechanisms

Chemical Society Reviews, Год журнала: 2024, Номер 53(10), С. 4877 - 4925

Опубликована: Янв. 1, 2024

This review systematically summarizes various redox mechanisms in Zn-based batteries and design strategies to improve their electrochemical performance, which provides a reference for future development of high-performance batteries.

Язык: Английский

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Highly Reversible Zinc Metal Anodes Enabled by Solvation Structure and Interface Chemistry Modulation

Advanced Energy Materials, Год журнала: 2023, Номер 13(36)

Опубликована: Авг. 9, 2023

Abstract Aqueous Zn−ion batteries (AZIBs) promise appealing advantages including safety, affordability, and high volumetric energy density. However, rampant parasitic reactions dendrite growth result in inadequate Zn reversibility. Here, a biocompatible additive, L‐asparagine (Asp), low‐cost aqueous electrolyte, is introduced to address these concerns. Combining substantive verification tests theoretical calculations, it demonstrated that an Asp‐containing ZnSO 4 electrolyte can create robust nanostructured solid‐electrolyte interface (SEI) by simultaneously modulating the 2+ solvation structure optimizing metal‐molecule interface, which enables dense deposition. The optimized supports excellent reversibility achieving dendrite‐free plating/stripping over 240 h at utilization of 85.5% symmetrical cell average 99.6% Coulombic efficiency for 1600 cycles asymmetrical cell. Adequate full‐cell performance with poly(3,4‐ethylenedioxythiophene) intercalated vanadium oxide (PEDOT‐V 2 O 5 ) cathode, delivers areal capacity 4.62 mAh cm −2 holds 84.4% retention 200 under practical conditions ultrathin anode (20 µm) low negative/positive ratio (≈2.4). This engineering strategy provides new insights into regulating anode/electrolyte interfacial chemistries toward high‐performance AZIBs.

Язык: Английский

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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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