Facet‐Termination Promoted Uniform Zn (100) Deposition for High‐Stable Zinc‐Ion Batteries

Advanced Energy Materials, Год журнала: 2023, Номер 13(31)

Опубликована: Июнь 27, 2023

Abstract Reversibility, usually evaluated by Coulombic efficiency (CE) and limited dendrite growth, has become the major roadblock toward widespread commercialization of zincion batteries. Tailoring Zn deposition behavior is vital to prevent growth. In this work, facet‐terminator serine introduced modulate interface obstruct rampant growth (100) plane. The cation (Ser + ) revealed preferentially adsorb onto electrode/electrolyte interface, suppressing interfacial parasitic reaction. Theoretical analysis postmortem/operando experimental techniques indicate that Ser bestows (100)‐dominated morphology zinc anodes, enabling a highly reversible dendrite‐free anode. These features endow anode with long cyclic life more than 800 h for Zn//Zn batteries high average 99.8% at 5 mA cm −2 mAh Zn//Cu When assembling commercial V 2 O , full battery delivers capacity 345.1 g −1 A retention 74.1% over 2000 cycles.

Язык: Английский

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Building Sustainable Saturated Fatty Acid-Zinc Interfacial Layer toward Ultra-Stable Zinc Metal Anodes

Nano Letters, Год журнала: 2023, Номер 23(8), С. 3573 - 3581

Опубликована: Апрель 12, 2023

The commercialization pace of aqueous zinc batteries (AZBs) is seriously limited due to the uncontrolled dendrite growth and severe corrosion reaction anode. Herein, a universal extendable saturated fatty acid-zinc interfacial layer strategy for modulating redox process toward ultrastable Zn metal anodes proposed. in situ complexing interphases could construct an extremely thin compound with continuously constructed zincophilic sites which kinetically regulates nucleation deposition behaviors. Furthermore, multifunctional internal hydrophobic carbon chains as protective efficient exclude active water molecules from surface efficiently inhibit zinc. Consequently, modified anode shows long cycle life over 4000 h at 5 mA cm–2. In addition, assembled Zn||V2O5 full cells based on have excellent rate performance stability.

Язык: Английский

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Hydrogen bond acceptor lined hydrogel electrolyte toward Dendrite-Free aqueous Zn ion batteries with low temperature adaptability

Chemical Engineering Journal, Год журнала: 2023, Номер 464, С. 142607 - 142607

Опубликована: Март 27, 2023

Язык: Английский

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Lotus Effect Inspired Hydrophobic Strategy for Stable Zn Metal Anodes

Advanced Materials, Год журнала: 2023, Номер 36(11)

Опубликована: Окт. 13, 2023

Abstract Zn‐ion batteries (ZIBs) have long suffered from the unstable Zn metal anode, which faces numerous challenges concerning dendrite growth, corrosion, and hydrogen evolution reaction. The absence of H 2 O adsorption control techniques has become a bottleneck for further development ZIBs. Using stearic acid (SA)‐modified Cu@Zn (SA‐Cu@Zn) anode as an example, this work illustrates how lotus effect controls energy on anode. In situ integrated Cu nanorods arrays hydrophobic long‐chain alkyl groups are constructed, provide zincophilic ordered channels property. Consequently, SA‐Cu@Zn exhibits long‐term cycling stability over 2000 h high average Coulombic efficiency (CE) 99.83% at 1 mA cm −2 mAh , improves electrochemical performance Zn||V 5 full cell. Density functional theory (DFT) calculations combined with water contact angle (CA) measurements demonstrate that larger CA weaker than Zn. Moreover, presence ensures selective well explaining excellent reversibility is achieved. This demonstrates effectiveness controllable deposition mechanism, offering universal strategy achieving stable ZIB anodes.

Язык: Английский

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Hydrated Eutectic Electrolyte Induced Bilayer Interphase for High‐Performance Aqueous Zn‐Ion Batteries with 100 °C Wide‐Temperature Range

Advanced Materials, Год журнала: 2023, Номер 36(11)

Опубликована: Дек. 13, 2023

Abstract The practical implementation of aqueous zinc‐ion batteries (AZIBs) encounters challenges such as dendrite growth, parasitic reactions, and severe decay in battery performance under harsh environments. Here, a novel hydrated eutectic electrolyte (HEE) composed Zn(ClO 4 ) 2 ·6H O, ethylene glycol (EG), InCl 3 solution is introduced to effectively extend the lifespan AZIBs over wide temperature range from −50 50 °C. Molecular dynamics simulations spectroscopy analysis demonstrate that H O molecules are confined within liquid network through dual‐interaction, involving coordination with Zn 2+ hydrogen bonding EG, thus weakening activity free water extending electrochemical window. Importantly, cryo‐transmission electron microscopy techniques reveal HEE situ forms zincophobic/zincophilic bilayer interphase by dissociation‐reduction molecules. Specifically, zincophilic reduces energy barrier for nucleation, promoting uniform deposition, while zincophobic prevents active contacting surface, inhibiting side reactions. Furthermore, relationships between structural evolution interfacial chemistry at electrode/electrolyte further discussed this work. scalability design strategy can bring benefits operating range.

Язык: Английский

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