An Ultrahigh‐Modulus Hydrogel Electrolyte for Dendrite‐Free Zinc Ion Batteries

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 14, 2024

Abstract Quasi‐solid‐state aqueous zinc ion batteries suffer from anodic dendrite growth during plating/stripping processes, impeding their commercial application. The inhibition of dendrites by high‐modulus electrolytes has been proven to be effective. However, hydrogel are difficult achieve high modulus owing inherent water contents. This work reports a electrolyte with ultrahigh that can overcome the stress through mechanical suppression effect. By combining wet‐annealing, solvent‐exchange, and salting‐out processes tuning hydrophobic crystalline domains, is obtained substantial content (≈70%), (198.5 MPa), toughness (274.3 MJ m −3 ), zinc‐ion conductivity (28.9 mS cm −1 which significantly outperforms previously reported poly(vinyl alcohol)‐based hydrogels. As result, exhibits excellent dendrite‐suppression effect achieves stable performance in Zn||Zn symmetric (1800 h cycle life at 1 mA −2 ). Moreover, Zn||V 2 O 5 pouch display cycling operate stably even under extreme conditions, such as large bending angle (180°) automotive crushing. provides promising approach for designing mechanically reliable advanced batteries.

Язык: Английский

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Tough Supramolecular Hydrogels Crafted via Lignin‐Induced Self‐Assembly

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 10, 2024

Abstract Supramolecular hydrogels are typically assembled through weak non‐covalent interactions, posing a significant challenge in achieving ultra strength. Developing higher strength based on molecular/nanoscale engineering concepts is potential improvement strategy. Herein, super‐tough supramolecular hydrogel by gradually diffusing lignosulfonate sodium (LS) into polyvinyl alcohol (PVA) solution. Both simulations and analytical results indicate that the assembly subsequent enhancement of crosslinked network primarily attributed to LS‐induced formation gradual densification strong crystalline domains within hydrogel. The optimized exhibits impressive mechanical properties with tensile ≈20 MPa, Young's modulus ≈14 toughness ≈50 MJ m⁻ 3 , making it strongest lignin‐PVA/polymer known so far. Moreover, LS provides excellent low‐temperature stability (<‐60 °C), antibacterial, UV‐blocking capability (≈100%). Interestingly, diffusion ability demonstrated for self‐restructuring damaged hydrogel, 3D patterning surfaces, enhancing local freeze‐thaw PVA goal foster versatile platform combining eco‐friendly biocompatible PVA, paving way innovation interdisciplinarity biomedicine, materials, forestry science.

Язык: Английский

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High‐Strength, Antiswelling Directional Layered PVA/MXene Hydrogel for Wearable Devices and Underwater Sensing

Advanced Science, Год журнала: 2024, Номер 11(39)

Опубликована: Авг. 20, 2024

Abstract Hydrogel sensors are widely utilized in soft robotics and tissue engineering due to their excellent mechanical properties biocompatibility. However, high‐water environments, traditional hydrogels can experience significant swelling, leading decreased electrical performance, potentially losing shape, sensing capabilities. This study addresses these challenges by leveraging the Hofmeister effect, coupled with directional freezing salting‐out techniques, develop a layered, high‐strength, tough, antiswelling PVA/MXene hydrogel. In particular, process enhances self‐entanglement of PVA, resulting an S‐PM hydrogel tensile strength up 2.87 MPa. Furthermore, retains its structure after 7 d only 6% change resistance. Importantly, performance is improved postswelling, capability rarely achievable hydrogels. Moreover, demonstrates faster response times more stable resistance rates underwater tests, making it crucial for long‐term continuous monitoring challenging aquatic ensuring sustained operation monitoring.

Язык: Английский

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Super‐Tough, Non‐Swelling Zwitterionic Hydrogel Sensor Based on the Hofmeister Effect for Potential Motion Monitoring of Marine Animals

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 10, 2024

Hydrogel-based electronic devices in aquatic environments have sparked widespread research interest. Nevertheless, the challenge of developing hydrogel electronics underwater has not been profoundly surmounted because fragility and swelling hydrogels environments. In this work, a zwitterionic double network comprised polyvinyl alcohol (PVA), poly(sulfobetaine methacrylate) (PSBMA), sulfuric acid (H

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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Strong and tough polyvinyl alcohol hydrogels with high intrinsic thermal conductivity

Soft Science, Год журнала: 2025, Номер 5(1)

Опубликована: Янв. 26, 2025

Although polyvinyl alcohol (PVA) hydrogels display huge potential in tissue engineering, flexible and wearable electronic devices soft robotics, their low intrinsic thermal conductivity weak mechanical properties severely limit wider applications these areas. Herein, a Hofmeister effect-assisted “directional freezing-stretching” tactic is employed for simultaneously enhancing the conduction of PVA hydrogels. The are obtained through directional freezing followed by salting-out treatment subsequent stretching (DFS). DFS hydrogel with 15 wt% ratio 4 (DFS4) exhibits highest 1.25 W/(m·K), which 2.4 2.8 times that prepared frozen-thawed (FT) [0.52 W/(m·K)] frozen-salted out (FS) [0.45 methods, respectively. DFS4 also possesses greatly improved performances, exhibiting an elongation at break 163.1%. In addition, tensile strength, toughness, elastic modulus significantly increase to 27.1 MPa, 25.3 MJ·m-3, 21.5 MPa from 0.4 0.32 0.07 FT hydrogels, It elucidated effect generates hydrophobic crystalline regions, while enhance chain orientation strategy. These effects synergistically contribute improvement

Язык: Английский

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A Flexible-Integrated Multimodal Hydrogel-Based Sensing Patch

Nano-Micro Letters, Год журнала: 2025, Номер 17(1)

Опубликована: Фев. 21, 2025

Abstract Sleep monitoring is an important part of health management because sleep quality crucial for restoration human health. However, current commercial products polysomnography are cumbersome with connecting wires and state-of-the-art flexible sensors still interferential being attached to the body. Herein, we develop a flexible-integrated multimodal sensing patch based on hydrogel its application in unconstraint monitoring. The comprises bottom hydrogel-based dual-mode pressure–temperature layer top electrospun nanofiber-based non-contact detection as one integrated device. core substrate exhibits strong toughness water retention, temperature, pressure, proximity realized different mechanisms no crosstalk interference. function verified simulated real-world scenario by robotic hand grasping objects validate practicability. Multiple patches locations pillow assembled intelligent Versatile human–pillow interaction information well their evolution over time acquired analyzed one-dimensional convolutional neural network. Track head movement recognition bad patterns that may lead poor achieved, which provides promising approach

Язык: Английский

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Amphibious Polymer Materials with High Strength and Superb Toughness in Various Aquatic and Atmospheric Environments

Advanced Materials, Год журнала: 2023, Номер 36(2)

Опубликована: Сен. 8, 2023

Herein, the fabrication of amphibious polymer materials with outstanding mechanical performances, both underwater and in air is reported. A polyvinyl alcohol/poly(2-methoxyethylacrylate) (PVA/PMEA) composite multiscale nanostructures prepared by combining solvent exchange thermal annealing strategies, which contributes to nanophase separation rigid PVA-rich soft PMEA-rich phases high-density crystalline domains PVA chains, respectively. Benefiting from nanostructure, PVA/PMEA hydrogel demonstrates excellent stability harsh (such as acidic, alkaline, saline) aqueous solutions, well superior behavior a breaking strength up 34.8 MPa toughness 214.2 MJ m

Язык: Английский

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Highly ion-conducting, robust and environmentally stable poly(vinyl alcohol) eutectic gels designed by natural polyelectrolytes for flexible wearable sensors and supercapacitors

Chemical Engineering Journal, Год журнала: 2023, Номер 480, С. 147888 - 147888

Опубликована: Дек. 14, 2023

Язык: Английский

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Highly Strong, Tough, and Cryogenically Adaptive Hydrogel Ionic Conductors via Coordination Interactions

Research, Год журнала: 2023, Номер 7

Опубликована: Дек. 18, 2023

Despite the promise of high flexibility and conformability hydrogel ionic conductors, existing polymeric conductive hydrogels have long suffered from compromises in mechanical, electrical, cryoadaptive properties due to monotonous functional improvement strategies, leading lingering challenges. Here, we propose an all-in-one strategy for preparation poly(acrylic acid)/cellulose (PAA/Cel) conductors a facile yet effective manner combining acrylic acid salt-dissolved cellulose, which abundant zinc ions simultaneously form strong coordination interactions with two polymers, while free solute salts contribute conductivity bind water molecules prevent freezing. Therefore, developed PAA/Cel achieved excellent conductive, cryogenically adaptive properties, performances 42.5 MPa compressive strength, 1.6 tensile 896.9% stretchability, 9.2 MJ m

Язык: Английский

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