Unraveling Paradoxical Effects of Large Current Density on Zn Deposition

Advanced Materials, Год журнала: 2024, Номер 36(27)

Опубликована: Апрель 23, 2024

Abstract Aqueous zinc‐based batteries (ZBs) have been widely investigated owing to their intrinsic safety, low cost, and simple assembly. However, the actual behavior of Zn deposition under large current density is still a severe issue associated with obscure mechanism interpretation ZBs high loading. Here, differing from conventional understanding that short circuit induced by dendrite penetrating (10–100 mA cm −2 ), separator permeation effect unraveled illustrate paradox between smooth lifespan. Generally, dense plating morphology achieved because intensive nuclei boosted plane growth. Nevertheless, in scenes applying separators, multiplied local derived narrow channels leads rapid 2+ exhaustion, converting mode nucleation control concentration control, which eventually results circuit. This validated other aqueous metal anodes (Cu, Sn, Fe) receives similar results. Based on understanding, micro‐pore (150 µm) sponge foam proposed as separators for large‐current provide broader path mitigate effect. work provides unique perspectives coordinating fast‐charging ability anode stability ZBs.

Язык: Английский

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Trace Selenium Doping for Improving the Reaction Kinetics of ZnS Cathode for Aqueous Zn–S Batteries

Small, Год журнала: 2024, Номер unknown

Опубликована: Май 14, 2024

Abstract Aqueous Zinc–sulfur (Zn–S) batteries are promising for the field of energy storage due to their low cost, high theoretical capacity, and safety. However, large volume expansion inherently poor conductivity sulfur would result in electrode cracking sluggish reaction kinetics, limiting practical application Zn–S batteries. Herein, commercial zinc sulfide (ZnS) is employed instead S as cathode proposed a doping modification strategy solve above problems. The designed ZnS 0.93 Se 0.07 shows good cycle stability much‐improved which smaller bandgap (1.40 eV) compared (1.86 eV). As result, obtained exhibits specific capacity 552 mAh g −1 (1672.6 based on S) at 0.1 A 330 (1000 2 . Moreover, can provide areal 3.8 cm −2 mass loading 10 mg limited electrolyte (4 µL ). This work provides simple effective strategy, conducive promoting

Язык: Английский

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Internal Electron Donor Accelerated Sulfur Redox for Aqueous Zn─S Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 16, 2024

Abstract Improving the electrical conductivity of sulfur cathode while ensuring its high affinity to catalyst holds key facilitate reaction kinetics aqueous zinc–sulfur batteries. Herein, redox in electrolyte is accelerated by introducing selenium–sulfur bonds into structure build an internal electron transport path. The Se with less electronegativity can act as donor accelerate binding between S and Zn 2+ . Meanwhile, bonded electron‐poor state endows modified a strong I 3 − catalyst, which further facilitates conversion efficiency. Thus, assisted delivers excellent electrochemical performance terms reversible capacity (1490 mAh g −1 at 0.5 A ), competitive rate (1010 4 well outstanding cycle stability (735 after 500 cycles).

Язык: Английский

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Hydrophobic Two-Dimensional Layered Superstructure of a Polyoxometalate Cluster as the Cathode Material for Aqueous Zinc-Ion Batteries

Nano Letters, Год журнала: 2024, Номер 24(23), С. 6881 - 6888

Опубликована: Май 30, 2024

Aqueous zinc-ion batteries hold promise for sustainable energy storage, yet challenges in finding high-performance cathode materials persist. Polyoxovanadates (POVs) are emerging as potential candidates due to their structural diversity and robust redox activity. Despite potential, issues like dissolution electrolytes, degradation, byproduct accumulation This work introduces a POV-based hydrophobic two-dimensional (2D) layered superstructure that addresses these challenges. The nature minimizes POV dissolution, enhancing stability inhibiting phase transitions during cycling. 2D arrangement ensures larger surface area improved electronic conductivity, resulting faster kinetics higher specific capacity. demonstrates cycle life an increased operating voltage, marking significant advancement aqueous batteries.

Язык: Английский

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Engineering Electrolyte Network Structure for Improved Kinetics and Dendrite Suppression in Zn‐S Batteries

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

Опубликована: Ноя. 27, 2024

Aqueous zinc-sulfur batteries (Zn-S) are promising alternatives to conventional lithium-ion technology due their high energy density, low cost, and enhanced safety. However, challenges such as slow redox kinetics of sulfur cathode conversion inadequate anode stability persist. This study demonstrates that by tuning the electrolyte structure with introduction propylene glycol methyl ether (PM) a co-solvent ZnI2 an additive, significant improvements at both electrodes could be achieved. Experimental theoretical calculations reveal larger polar -OH C-O-C electron-donating groups in PM molecule can donate electrons for reaction I-/I3 -. Its role mediator improves reversibility cathodic transformation. Additionally, dipole moment induced hydroxyl enhances electron transfer from zinc promote decomposition anions (OTF-), improving interfacial anode. The synergistic effect - pair enables battery deliver impressive capacity 1456 mAh g-1 density 471.8 Wh kg-1 current 0.2 A g-1.

Язык: Английский

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Modulating electrolyte solvation for high-performance aqueous zinc–sulfur batteries

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(32), С. 21350 - 21356

Опубликована: Янв. 1, 2024

The designed dimethylacetamide-based hybrid electrolyte exhibits 2.5 times lower zinc corrosion and improved sulfur cathode wettability, thus enabling a high-performance aqueous Zn/S battery.

Язык: Английский

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Healable and Conductive Two-Dimensional Sulfur Iodide for High-Rate Sodium Batteries

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(25), С. 32291 - 32297

Опубликована: Июнь 14, 2024

Self-healing functional materials can repair cracks and damage inside the battery, ensuring stability of battery material structure. This feature minimizes performance degradation during charging discharging processes, improving efficiency battery. Here, we have developed a novel healing conductive two-dimensional sulfur iodide (SI4) composite cathode. process integrates both iodine compounds into carbon nanocages, forming SI4@C core–shell cathode design improves electrical conductivity repairability, facilitates rapid activation, ensures structural integrity, resulting in typical Na–SI4 with high capacity an exceptionally long cycle life. At 10.0 A g–1, still reach 217.4 mAh g–1 after more than 500 cycles, decay rate per is only 0.06%. In addition, exhibits cascade redox reaction involving S I, contributing to its capacity. The situ growth shell further enhances robustness entire flexibility bendability SI4@C-carbon cloth make it applicable for flexible electronic devices, providing possibilities design. strategy engineering self-healing structure construct superior expected be widely applied other electrode materials. study provides new pathway designing binary-conversion-type sodium-ion batteries excellent long-term cycling performance.

Язык: Английский

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Revitalizing Dead Zinc with Ferrocene/Ferrocenium Redox Chemistry for Deep‐Cycle Zinc Metal Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 64(1)

Опубликована: Авг. 28, 2024

Aqueous zinc (Zn) batteries are highly desirable for sustainable and large-scale electrochemical energy storage technologies. However, the ceaseless dendrite growth derived dead Zn principally responsible capacity decay insufficient lifespan. Here, we propose a dissolved oxygen-initiated revitalization strategy to reactivate via ferrocene redox chemistry, which can be realized by incorporating trace amount of poly(ethylene glycol) as solubilizer improve solubility water-insoluble derivatives. Ferrocene scaffold spontaneously oxidized ferricenium cations oxygen, eradicates oxygen-involved corrosion insulating by-product generation. Subsequently, generated scavenger rejuvenate electrically isolated into electroactive

Язык: Английский

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Low-Cost Aqueous Electrolyte with MBA Additives for Uniform and Stable Zinc Deposition

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(23), С. 30580 - 30588

Опубликована: Июнь 1, 2024

Aqueous zinc ion batteries (AZIBs) are attracting increasing research interest due to their intrinsic safety, low cost, and scalability. However, the issues including hydrogen evolution, interface corrosion, dendrites at anodes have seriously limited development of aqueous batteries. Here, N,N-methylenebis(acrylamide) (MBA) additives with −CONH- groups introduced form bonds water suppress H2O activity, inhibiting occurrence evolution corrosion reactions interface. In situ optical microscopy demonstrates that MBA additive promotes uniform deposition Zn2+ then suppresses dendrite growth on anode. Therefore, Zn//Ti asymmetric demonstrate a high plating/stripping efficiency 99.5%, while Zn//Zn symmetric display an excellent cycle stability for more than 1000 h. The Zn//MnO2 full cells exhibit remarkable cycling 700 cycles in electrolytes additives. engineering via achieved dendrite-free Zn stable batteries, which is favorable advanced AZIBs practical applications.

Язык: Английский

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Recent Progress on Rechargeable Zn‐X (X=S, Se, Te, I2, Br2) batteries

ChemSusChem, Год журнала: 2024, Номер unknown

Опубликована: Авг. 8, 2024

Abstract Recently, aqueous Zn−X (X=S, Se, Te, I 2 , Br ) batteries (ZXBs) have attracted extensive attention in large‐scale energy storage techniques due to their ultrahigh theoretical capacity and environmental friendliness. To date, despite tremendous research efforts, achieving high density ZXBs remains challenging requires a synergy of multiple factors including cathode materials, reaction mechanisms, electrodes electrolytes. In this review, we comprehensively summarize the various conversion mechanism zinc‐sulfur (Zn−S) batteries, zinc‐selenium (Zn−Se) zinc‐tellurium (Zn−Te) zinc‐iodine (Zn−I zinc‐bromine (Zn−Br along with recent important progress design electrolyte advanced (S, materials. Additionally, investigate fundamental questions highlight correlation between battery performance. This review will stimulate an in‐deep understanding guide batteries.

Язык: Английский

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