Bioinspired Tough Solid‐State Electrolyte for Flexible Ultralong‐Life Zinc–Air Battery

Advanced Materials, Год журнала: 2022, Номер 34(18)

Опубликована: Март 22, 2022

Manufacturing advanced solid-state electrolytes (SSEs) for flexible rechargeable batteries becomes increasingly important but remains grand challenge. The sophisticated structure of robust animal dermis and good water-retention plant cell in nature grant germane inspirations designing high-performance SSEs. Herein, tough bioinspired SSEs with intrinsic hydroxide ion (OH- ) conduction are constructed by situ formation OH- conductive ionomer network within a hollow-polymeric-microcapsule-decorated hydrogel polymer network. By virtue the design dynamic dual-penetrating structure, simultaneously obtain mechanical robustness 1800% stretchability, water uptake 107 g g-1 retention, superhigh conductivity 215 mS cm-1 . nanostructure SSE related ion-conduction mechanism revealed visualized molecular dynamics simulation, where plenty compact superfast ion-transport channels constructed, contributing to conductivity. As result, zinc-air assembled witness high power density 148 mW cm-2 , specific capacity 758 mAh ultralong cycling stability 320 h as well outstanding flexibility. methodology deep insight will shed light on energy conversion storage systems.

Язык: Английский

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Mechanically Robust and Transparent Organohydrogel‐Based E‐Skin Nanoengineered from Natural Skin

Advanced Functional Materials, Год журнала: 2023, Номер 33(15)

Опубликована: Янв. 29, 2023

Abstract Electronic skins (e‐skins), which are mechanically compliant with human skin, regarded as ideal electronic devices for noninvasive human–machine interaction and wearable devices. In order to fully mimic e‐skins should possess reliable mechanical properties be able resist external environmental factors like heat, cold, desiccation, bacteria, while perceiving multiple stimuli, such temperature, humidity, strain. Here, a transparent, robust, environmentally stable, versatile natural skin‐derived organohydrogel (NSD‐Gel) is nanoengineered through the integration of betaine, silver nanoparticles, sodium chloride in glycerol/water binary solvent. The transparent NSD‐Gel e‐skin exhibits outstanding tensile strength (7.33 MPa), puncture resistance, moisture retention, self‐regeneration, antibacterial properties. Additionally, possesses enhanced cold/heat resistance stimuli‐responsive characteristics that effectively sense temperature humidity changes, well physiological body motion signals. vitro vivo experiments show confers desired biocompatibility tissue protective even extremely harsh environments (−196 °C 100 °C). has great potential applications multidimensional devices, human‐machine interfaces, artificial intelligence, generating platform development high‐performance on‐demand

Язык: Английский

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Environmentally Compatible Wearable Electronics Based on Ionically Conductive Organohydrogels for Health Monitoring with Thermal Compatibility, Anti‐Dehydration, and Underwater Adhesion

Small, Год журнала: 2021, Номер 17(24)

Опубликована: Май 19, 2021

Abstract Hydrogel‐based electronics have found widespread applications in soft sensing and health monitoring because of their remarkable biocompatibility mechanical features similar to human skin. However, they are subjected potential challenges like structural failure, functional degradation, device delamination practical applications, especially facing extreme environmental conditions (e.g., abnormal temperature humidity). To address these, ionically conductive organohydrogel‐based developed, which can perform at subzero elevated temperatures (thermal compatibility) as well dehydrated hydrated environments (hydration for extended applications. More specifically, gelatin/poly(acrylic acid– N ‐hydrosuccinimide ester) (PAA–NHS ester)‐based ionic‐conductive organohydrogel is synthesized. By introducing a glycerol–water binary solvent system, the gel maintain softness wide range (from −80 60 °C). Besides, excellent conductivity achieved under various by soaking into lithium chloride anhydrous (LiCl) solution. Strong adhesion with skin, even water, be realized covalent bonds between NHS ester from amino groups The performances LiCl‐loaded PAA‐based (L‐PAA‐OH)‐based further demonstrated freezing high underwater conditions, unveiling promising prospects wearable conditions.

Язык: Английский

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Poly(vinyl alcohol) Hydrogels with Integrated Toughness, Conductivity, and Freezing Tolerance Based on Ionic Liquid/Water Binary Solvent Systems

ACS Applied Materials & Interfaces, Год журнала: 2021, Номер 13(24), С. 29008 - 29020

Опубликована: Июнь 13, 2021

In recent years, ionic conductive hydrogels have shown great potential for application in flexible sensors, energy storage devices, and actuators. However, developing facile effective methods fabricating such remains a challenge, especially that retain their properties extreme environmental conditions, as at subzero temperatures or open-air conditions. Herein, water-miscible liquid (IL), 1-ethyl-3-methylimidazolium acetate (EMImAc), was introduced to form an IL/water binary solvent system poly(vinyl alcohol) (PVA) create PVA hydrogels. The physically crosslinked PVA/EMImAc/H2O showed better mechanical transparency than the traditional hydrogel prepared by freeze–thaw method due formation of homogeneous small microcrystals EMImAc/H2O system. More importantly, exhibited significant anti-freezing water-retaining because presence IL. remained low −50 °C retained more 90% weight after conditions 2 weeks. addition, thermal stability could be increased 95 through addition Mg(II) ions. A multimodal sensor based on PVA/EMImAc/H2O/Mg(II) high sensitivity quick response changes pressure, strain, temperature, with both long-term wide working temperature range. This study may open new route fabrication functional PVA-based electrolytes provide practical pathway use multifunctional electronic sensory device applications.

Язык: Английский

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A temperature responsive adhesive hydrogel for fabrication of flexible electronic sensors

npj Flexible Electronics, Год журнала: 2022, Номер 6(1)

Опубликована: Авг. 5, 2022

Abstract Flexible electronics are playing an increasingly important role in human health monitoring and healthcare diagnosis. Strong adhesion on tissue would be ideal for reducing interface resistance motion artifacts, but arising problems such as skin irritation, rubefaction, pain upon device removal have hampered their utility. Here, inspired by the temperature reversibility of hydrogen bonding, a skin-friendly conductive hydrogel with multiple-hydrogen bonds was designed using biocompatible poly(vinyl alcohol) (PVA), phytic acid (PA), gelatin (Gel). The obtained PVA/PA/Gel (PPG) temperature-triggered tunable mechanic could reliably adhere to detect electrophysiological signals under hot compress while readily removed cool compress. Furthermore, additional advantages transparency, breathability, antimicrobial activity PPG ensure its long-time wearable value skin. It is both environmentally friendly cost saving waste during production can recycled based reversible physical bonding. sensor expected good application prospects record monitoring.

Язык: Английский

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