Achieving Fast Ionic Transport and High Mechanical Properties of Cellulose-Based Solid-State Electrolyte via a Cationic Chain-Extended Effect for Zinc Metal Batteries

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Фев. 2, 2025

In recent years, rechargeable aqueous zinc metal batteries have ushered in rapid development, but their large-scale industrial application is hindered by anode dendrite formation and hydrogen evolution reaction. Using a solid-state polymer electrolyte one of the strategies to solve this problem. Herein, introducing chain-expanding effect salts on oxidized bacterial cellulose, cellulose-based electrolytes with excellent strength ionic conductivity are prepared. According thermogravimetric calculations, bound water content prepared greatly increases, which slows down occurrence side reactions. More importantly, expanding distance between fiber chains provides more space for movement Zn2+. The obtained displays high (38.26 mS cm-1) good mechanical properties (tensile stress 592 kPa tensile strain 381%). Due solid itself, its electrochemical window expanded 2.58 V. assembled Zn∥Zn symmetrical battery maintains an ultralong cycle lifespan over 980 h 0.5 mA cm-2. Zn∥NH4V10O10 specific capacity (363.1 mAh g-1 at 0.1 A g-1) shows satisfactory rate performance.

Язык: Английский

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Green Polymer Derived Multifunctional Layer Achieving Oriented Diffusion and Controllable Deposition of Zn²⁺ for Ultra-Durable Zinc-Ion Hybrid Supercapacitors

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

Rampant dendrite growth and severe parasitic reactions at the electrode/electrolyte interface significantly limit cycle life of aqueous zinc ion hybrid supercapacitors (ZHSCs). In this study, sodium lignosulfonate (SLS) as one green polymer was introduced into ZnSO4 electrolyte to construct a multifunctional layer on surface Zn plates. Experimental analyses theoretical calculations show that presence SLS layer, rich in oxygen-containing functional groups (-SO3-), can not only modulate structure electric double (EDL) suppress interfacial side caused by free H2O SO42-, but also promote (101)-oriented deposition selectively controlling behavior Zn2+ through specific adsorption different crystalline surfaces. The optimized allows stable Zn//Zn symmetric cells achieve cumulative plating capacity exceeding 4 Ah cm-2 high areal 5 mAh cm-2, cycling for more than 1000 cycles with an excellent average Coulombic efficiency 99.34% Zn//Cu asymmetric cells. Zn//AC ZHSC exhibits ultralong stability over 40,000 electrolyte, decay rate low 0.000285% per cycle.

Язык: Английский

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Interfacial Molecule Engineering Builds Tri‐Functional Bilayer Silane Films with Hydrophobic Ion Channels for Highly Stable Zn Metal Anode

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 24, 2025

Abstract The vulnerable Zn electrode interface with uncontrolled dendrite growth and severe parasitic side reactions constrains the practical application of aqueous zinc‐ion batteries (AZIBs). General engineering offers a promising approach to relieve these issues but is limited by confined functionality, low affinity, additional weight protective layer. In this study, bilayer silane film (SF) developed hydrophobic, ion‐buffering, strong interfacial adhesion properties through precise assembly coupling agents. well‐designed SF layer enables 2+ undergo continuous processes, including being captured –CF 3 groups, followed in sequence inducing desolvation, directed diffusing nanochannels, buffered diffusion. This multiple process contributed accelerated [Zn(H 2 O) 6 ] stabilized transport, inhibited reactions. Consequently, dendrite‐free highly reversible SF@Zn anodes are realized, exhibiting an ultra‐long lifetime (more than 4300 h), high Coulombic efficiency (CE) (99.1% after 2600 cycles), superior full cell capacity retention (83.2% 1000 cycles). innovative strategy provides novel method enhance anode stability via molecular‐level design multicomponent reaction, offering new insights into advanced for AZIBs.

Язык: Английский

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Multifunctional electrolyte additives enabled adaptable interface toward stabilizing Zn metal anodes

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 158737 - 158737

Опубликована: Дек. 1, 2024

Язык: Английский

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