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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Grafted MXene Assisted Bifunctional Hydrogel for Stable and Highly Sensitive Self‐Powered Fibrous System

Advanced Functional Materials, Год журнала: 2024, Номер 34(24)

Опубликована: Фев. 21, 2024

Abstract Achieving highly efficient self‐powered fibrous sensing systems is desirable for smart electronic textiles but remains a great challenge. Here, bifunctional hydrogel proposed by introducing of polyacrylic acid grafted MXene (MXene‐g‐PAA) into polyacrylamide/chitosan, achieving high‐sensitivity sensor and stable electrolyte battery. The MXene‐g‐PAA flakes act as ion transport “highway”, significantly enhance ionic conductivity, thereby increasing the sensitivity sensors facilitating Zn 2+ diffusion in Zn‐ion battery (ZIB). rich hydrogen bonding network improves its mechanical properties limits water molecule movement, thus reducing side reactions prolonging stability ZIB. As result, exhibits high strain (gauge factor 2.4) with wide detection range (0–800%), capacity (353 mAh cm −3 ) long cycling (400 cycles). hydrogel‐based ZIB can be easily integrated flexible system, which effectively detects human movement 3D ball motion. system will shed light on development next‐generation textiles.

Язык: Английский

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Asymmetric Coordination of Bimetallic Fe–Co Single-Atom Pairs toward Enhanced Bifunctional Activity for Rechargeable Zinc–Air Batteries

ACS Nano, Год журнала: 2024, Номер 18(20), С. 13006 - 13018

Опубликована: Май 13, 2024

The advancement of rechargeable zinc–air batteries (RZABs) faces challenges from the pronounced polarization and sluggish kinetics oxygen reduction evolution reactions (ORR OER). Single-atom catalysts offer an effective solution, yet their insufficient or singular catalytic activity hinders development. In this work, a dual single-atom catalyst, FeCo-SAs, was fabricated, featuring atomically dispersed N3–Fe–Co–N4 sites on N-doped graphene nanosheets for bifunctional activity. Introducing Co into Fe single-atoms secondary pyrolysis altered coordination with N, creating asymmetric environment that promoted charge transfer increased density states near Fermi level. This catalyst achieved narrow potential gap 0.616 V, half-wave 0.884 V ORR (vs reversible hydrogen electrode) low OER overpotential 270 mV at 10 mA cm–2. Owing to superior RZABs exhibited peak power 203.36 mW cm–2 extended cycle life over 550 h, exceeding commercial Pt/C + IrO2 catalyst. Furthermore, flexible FeCo-SAs demonstrated promising future bimetallic pairs in wearable energy storage devices.

Язык: Английский

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Polycation-regulated hydrogel electrolytes with nanoscale hydrophobic confinement inducing Zn(002) deposition for highly reversible zinc anodes

Energy & Environmental Science, Год журнала: 2024, Номер 17(18), С. 6640 - 6655

Опубликована: Янв. 1, 2024

A polycation-regulated hydrogel electrolyte with nanoscale hydrophobic confinement addresses dendrites, corrosion, and lifespan issues in AZIBs by regulating the electric field, enhancing Zn 2+ migration, guiding Zn(002) plane growth.

Язык: Английский

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A Robust Hydrogel Electrolyte with Ultrahigh Ion Transference Number Derived from Zincophilic “Chain‐Gear” Network Structure for Dendrite‐Free Aqueous Zinc Ion Battery

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Апрель 10, 2024

Abstract As a promising energy storage device, an aqueous zinc ion battery (AZIB) still suffers dendrite growth, hydrogen evolution, and corrosion. Hydrogel electrolyte solves the above issues to some extent. Nevertheless, mechanical properties of most hydrogel electrolytes are not competitive enough meet booming demand for flexible electronics. In this work, robust “chain‐gear” (PM‐HE) crosslinked by polymeric micelles (PMs) is constructed, in which PMs serve as “gears” form structure with polyanion chains. Specifically, support molecular chains, constructing hierarchically porous structures opening up paths Zn 2+ . Apart from crosslinkers, exist mechanism chains promote decoupling. Such can realize desolvation accelerate transport. Thereby, PM‐HE possesses excellent ionic conductivity (60.6 mS cm −1 ) ultrahigh transference number (0.88). Symmetrical cells stable cycling over 1500 h uniform deposition. Remarkably, has tensile (0.23 MPa) compressive (11.3 profited strengthening toughening effect PMs. The supply power stably under harsh conditions. This work proposes strategy all‐around based on reasonable design network structure, providing more possibilities practical application AZIB.

Язык: Английский

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Interfacial Domino Effect Triggered by β‐alanine Cations Realized Highly Reversible Zinc‐Metal Anodes

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

Опубликована: Май 31, 2024

Realizing durative dense, dendrite-free, and no by-product deposition configuration on Zn anodes is crucial to solving the short circuit premature failure of batteries, which simultaneously determined by interface chemistry, electro-reduction kinetics, mass transfer process, their interaction. Herein, this work unmasks a domino effect β-alanine cations (Ala

Язык: Английский

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Polymer gels for aqueous metal batteries

Progress in Materials Science, Год журнала: 2025, Номер unknown, С. 101426 - 101426

Опубликована: Янв. 1, 2025

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Multifunctional MXene Conductive Zwitterionic Hydrogel for Flexible Wearable Sensors and Arrays

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(20), С. 24933 - 24947

Опубликована: Май 11, 2023

Conductive hydrogels have good prospects in the fields of flexible electronic devices and artificial intelligence due to their biocompatibility, durability, functional diversity. However, process hydrogel polymerization is time-consuming energy-consuming, freezing at zero temperature inevitable, which seriously hinders its applications working life. Herein, zwitterionic conductive with self-adhesive antifreeze properties were prepared one minute by introducing two-dimensional (2D) MXene nanosheets into autocatalytically enhanced system composed tannic acid-modified cellulose nanofibers zinc chloride. The has strong environmental applicability (-60 40 °C), stretchability (ductility ≈ 980%), durable adhesion (even after 30 days exposure air), electrical conductivity (20 °C, mS cm-1). By virtue these advantages, can be developed strain sensors monitor large human movements subtle physiological signals over a wide range capture from handwriting voice recognition. In addition, multiple assembled three-dimensional (3D) array, detect magnitude spatial distribution or force. These results demonstrate that promising medical monitoring intelligence.

Язык: Английский

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Hydrogel Electrolyte Enabled High‐Performance Flexible Aqueous Zinc Ion Energy Storage Systems toward Wearable Electronics

Small, Год журнала: 2023, Номер 19(48)

Опубликована: Авг. 2, 2023

To cater to the swift advance of flexible wearable electronics, there is growing demand for energy storage system (ESS). Aqueous zinc ion systems (AZIESSs), characterizing safety and low cost, are competitive candidates storage. Hydrogels, as quasi-solid substances, appropriate burgeoning electrolytes that enable high-performance AZIESSs. However, challenges still remain in designing suitable comprehensive hydrogel electrolyte, which provides AZIESSs with high reversibility versatility. Hence, application electrolyte-based electronics restricted. A thorough review required electrolyte design pave way This delves into engineering desirable from perspective designers. Detailed descriptions basic characteristics, Zn anode, cathode stabilization effects well their functional properties provided. Moreover, discussed, expecting accelerate strides toward lives. Finally, corresponding future development trends also presented, hope inspiring readers.

Язык: Английский

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Polyanion-induced single zinc-ion gel polymer electrolytes for wide-temperature and interfacial stable zinc-ion hybrid capacitors

Energy storage materials, Год журнала: 2023, Номер 63, С. 102982 - 102982

Опубликована: Сен. 18, 2023

Язык: Английский

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