Improvements and Challenges of Hydrogel Polymer Electrolytes for Advanced Zinc Anodes in Aqueous Zinc-Ion Batteries

ACS Nano, Год журнала: 2024, Номер 18(33), С. 21779 - 21803

Опубликована: Авг. 12, 2024

Aqueous zinc-ion batteries (AZIBs) are widely regarded as desirable energy storage devices due to their inherent safety and low cost. Hydrogel polymer electrolytes (HPEs) cross-linked polymers filled with water zinc salts. They not only used in flexible but also represent an ideal electrolyte candidate for addressing the issues associated Zn anode, including dendrite formation side reactions. In HPEs, abundance of hydrophilic groups can form strong hydrogen bonds molecules, reducing activity inhibiting decomposition. At same time, special

Язык: Английский

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Molecular Bridging Induced Anti‐salting‐out Effect Enabling High Ionic Conductive ZnSO4‐based Hydrogel for Quasi‐solid‐state Zinc Ion Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(44)

Опубликована: Июль 30, 2024

Abstract Hydrogel electrolytes (HEs) hold great promise in tackling severe issues emerging aqueous zinc‐ion batteries, but the prevalent salting‐out effect of kosmotropic salt causes low ionic conductivity and electrochemical instability. Herein, a subtle molecular bridging strategy is proposed to enhance compatibility between PVA ZnSO 4 from perspective hydrogen‐bonding microenvironment re‐construction. By introducing urea containing both an H‐bond acceptor donor, broken H‐bonds H 2 O, initiated by SO 2− ‐driven O polarization, could be re‐united via intense intermolecular hydrogen bonds, thus leading greatly increased carrying capacity . The urea‐modified PVA‐ZnSO HEs featuring high up 31.2 mS cm −1 successfully solves sluggish transport dilemma at solid‐solid interface. Moreover, organic solid‐electrolyte‐interphase can derived situ electro‐polymerization prohibit O‐involved side reactions, thereby prominently improving reversibility Zn chemistry. Consequently, anodes witness impressive lifespan extension 50 h 2200 0.1 mA −2 while Zn‐I full battery maintains remarkable Coulombic efficiency (>99.7 %) even after 8000 cycles. anti‐salting‐out this work provides insightful concept for addressing phase separation issue functional HEs.

Язык: Английский

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Interface‐Compatible Gel‐Polymer Electrolyte Enabled by NaF‐Solubility‐Regulation toward All‐Climate Solid‐State Sodium Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(18)

Опубликована: Март 11, 2024

Abstract Gel‐polymer electrolyte (GPE) is a pragmatic choice for high‐safety sodium batteries but still plagued by interfacial compatibility with both cathode and anode simultaneously. Here, salt‐in‐polymer fibers NaF salt inlaid in polylactide (PLA) fiber network was fabricated via electrospinning subsequent situ forming gel‐polymer liquid electrolytes. The obtained PLA‐NaF GPE achieves high ion conductivity (2.50×10 −3 S cm −1 ) large Na + transference number (0.75) at ambient temperature. Notably, the dissolution of occupies solvents leading to concentrated‐electrolyte environment, which facilitates aggregates increased anionic coordination (anion/Na >1). Aggregates higher HOMO realize preferential oxidation on so that inorganic‐rich stable CEI covers cathode’ surface, preventing particles’ breakage showing good different cathodes (Na 3 V 2 (PO 4 , 2+2x Fe 2‐x (SO 0.72 Ni 0.32 Mn 0.68 O NaTi ). While, passivated induced lower LUMO aggregates, surface tension between interface, dendrites‐free anode. As result, assembled || cells display excellent electrochemical performance all‐climate conditions.

Язык: Английский

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In‐Situ Spontaneous Electropolymerization Enables Robust Hydrogel Electrolyte Interfaces in Aqueous Batteries

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

Опубликована: Март 23, 2024

Abstract Hydrogels hold great promise as electrolytes for emerging aqueous batteries, which establishing a robust electrode‐hydrogel interface is crucial mitigating side reactions. Conventional hydrogel fabricated by ex situ polymerization through either thermal stimulation or photo exposure cannot ensure complete interfacial contact with electrodes. Herein, we introduce an in electropolymerization approach constructing electrolytes. The spontaneously generated during the initial cycling of battery, eliminating need additional initiators polymerization. involvement electrodes synthesis yields well‐bonded and deep infiltrated electrode‐electrolyte interfaces. As case study, attest that, situ‐formed polyanionic Zn‐MnO 2 battery substantially improves stability kinetics both Zn anode porous MnO cathode owing to This research provides insight function electrolyte interfaces constitutes critical advancement designing highly durable batteries.

Язык: Английский

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Strategies of regulating Zn2+ solvation structures toward advanced aqueous zinc-based batteries

Energy storage materials, Год журнала: 2024, Номер 70, С. 103451 - 103451

Опубликована: Май 11, 2024

Язык: Английский

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Spatially Confined Engineering Toward Deep Eutectic Electrolyte in Metal‐Organic Framework Enabling Solid‐State Zinc‐Ion Batteries

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

Опубликована: Авг. 23, 2024

Uncontrollable interfacial side reactions generated from common aqueous electrolytes, just like the hydrogen evolution reaction (HER) and dendrite growth, have severely prevented practical application of zinc-ion batteries (ZIBs). Solid-state ZIBs are considered to be an efficient strategy by adopting high-quality solid-state electrolytes (SSEs). Here, confining deep eutectic electrolyte (DEE) into nanochannels metal-organic framework (MOF)-PCN-222, a stable DEE@PCN-222 SSE with internal Zn

Язык: Английский

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Engineering water-lean solvation structure to modulate interfacial chemistry for high-performance aqueous zinc-ion battery

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 686, С. 960 - 969

Опубликована: Фев. 5, 2025

Язык: Английский

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Altering the Zn²⁺ Migration Mechanism Enables the Composite Hydrogel Electrolytes with High Zn²⁺ Conduction and Superior Anti‐Dehydration

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 27, 2025

Abstract Hydrogel electrolytes are favored for flexible zinc‐ion batteries (FZIBs) due to their biocompatibility. Their application progress, however, is severely restricted by the poor water retention and low Zn 2+ transference number (t ). Herein, one composite polymer electrolyte (CPE) prepared introducing Prussian blues (PBs) as multifunctional fillers in polyvinyl alcohol (PVA) matrix enhance t . Experimental theoretical characterizations confirm that PB filler can alter migration mechanism trap of CPE. PBs active provide extra zinc ions unique 3D ion diffusion channels. Moreover, metal centers framework function Lewis acid sites have good affinity with anions salt, facilitating dissociation salt. Additionally, absorb coordination water, enhancing anti‐dehydration capability ionic conductivity hydrogel electrolytes. Consequently, P‐15/Zn‐15 shows high 16.3 mS cm⁻ 1 0.63. The Zn||Zn symmetric cells stably operate 600 h at 50 °C. Zn||P‐15/Zn‐15|| NaV 3 O 8 ·1.5H 2 full cell exhibits excellent cycling performance cycles.

Язык: Английский

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In‐Situ Spontaneous Electropolymerization Enables Robust Hydrogel Electrolyte Interfaces in Aqueous Batteries

Angewandte Chemie, Год журнала: 2024, Номер 136(21)

Опубликована: Март 23, 2024

Abstract Hydrogels hold great promise as electrolytes for emerging aqueous batteries, which establishing a robust electrode‐hydrogel interface is crucial mitigating side reactions. Conventional hydrogel fabricated by ex situ polymerization through either thermal stimulation or photo exposure cannot ensure complete interfacial contact with electrodes. Herein, we introduce an in electropolymerization approach constructing electrolytes. The spontaneously generated during the initial cycling of battery, eliminating need additional initiators polymerization. involvement electrodes synthesis yields well‐bonded and deep infiltrated electrode‐electrolyte interfaces. As case study, attest that, situ‐formed polyanionic Zn‐MnO 2 battery substantially improves stability kinetics both Zn anode porous MnO cathode owing to This research provides insight function electrolyte interfaces constitutes critical advancement designing highly durable batteries.

Язык: Английский

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Failure Mechanisms and Strategies Toward Flexible Zinc‐Air Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(44)

Опубликована: Июль 1, 2024

Abstract Flexible zinc‐air batteries (FZABs) have emerged as a promising alternative to lithium‐ion in flexible electronic devices due the advantages of excellent mechanical properties, high energy density, and notable safety. However, unclear causes performance degradation failure mechanisms FZABs significantly impede their commercialization. Therefore, extensive research is needed fully reveal factors responsible for decline FZABs. In this review, FZABs' key components, including Zn anode, solid electrolyte, catalyst air cathode, electrolyte/electrode interface are analyzed discussed. To promote further development FZABs, series challenges corresponding strategies summarized analyzed. Finally, future envisioned. This paper aims comprehensively elucidate guide high‐performance thus

Язык: Английский

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