Templatesec-Built Structural Designs for Piezoelectrochemical Pressure Sensors

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(45), P. 62617 - 62626

Published: Oct. 29, 2024

Self-powered sensors, capable of detecting static and dynamic pressure without an external power source, are pivotal for advancements in human–computer interaction, health monitoring, artificial intelligence. Current sensing technologies, however, often fall short meeting the growing needs precise timely monitoring. This article introduces a novel self-powered sensor utilizing electrochemical reactions. The sensor's ion conduction path internal resistance adjust response to stress across broad range. Its three-dimensional structure, crafted by using simple template on electrolyte, enables efficient cost-effective detection various mechanical stimuli. device not only achieves optimized density approximately 2.34 mW cm–2─surpassing most existing technologies─but also features excellent flexibility, quick response, recovery times (0.15 0.19 s respectively); high durability (2000 cycles); range (0.23–20 kPa). Moreover, it serves as ionic touchpad, enhancing data collection recognition, integrates seamlessly with mouthpiece accurate, real-time monitoring respiratory activities. innovative offers minimal cost process requirements while providing multifunctional capabilities energy harvesting sensing, marking significant step forward design next-generation sensors.

Language: Английский

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Ytterbium-doping effect on the electrochemical and piezoelectric properties of poly(vinylidene fluoride) films

Materials Research Express, Journal Year: 2024, Volume and Issue: 11(7), P. 075309 - 075309

Published: July 1, 2024

Abstract The optimal molar ratio of poly(vinylidene fluoride) (PVDF): dimethyl sulfoxide (DMSO) was investigated that promoted the β -phase formation, used during PVDF film synthesis. solution cast method for doping films with ytterbium (III) nitrate salt hexahydrate. In general, Yb-doping in improves thermal resistance, promotes modifies monomer conformation, reduces reversibility to electrochemical processes, and increases d 33 coefficient piezoelectricity. formation caused by alters internal structures trans-gauche-trans-gauche’ (TGTG’) all-trans (TTTT) chains inside polymeric network. coexistence between trans-gauche provides both α coexistence. presence self-polarized CH 2 -CF dipoles, where concentration fluorine remains same drastically after Yb 3+ incorporation. quasi-reversible shape shown voltammetry cyclic curves is related irreversible oxidation reduction reactions. Yb-PVDF exhibits specific pseudocapacitance values are 30% higher than those films. Finally, piezoelectric properties were improved

Language: Английский

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Lead-Free Compositional Engineering to Induce Polar Phase in Polymeric Piezoelectric Host for Energy Harvesting Devices

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(6), P. 4532 - 4538

Published: June 6, 2024

With the growing demand and environmental concerns regarding applied electronic materials, a shift toward lead-free piezoelectric materials has been seen since past decade. Polyvinylene difluoride (PVDF) serves as ultralight-weight polymer for flexible self-powered sensors actuators; however, it suffers from low energy harvesting efficiency (10–12 V maximum output at typical pressure in range of 10–20 N/cm2 pure PVDF) due to dominance nonpolar alpha (α) phase. In this work, we developed method using α phase show performance response surpassing reported PVDF-TrFe (trifluoroethylene-grafted by compositional engineering with help inorganic fillers. The capability PVDF was increased almost 180% filler such barium titanate (BaTiO3 or BTO) PVDF:BTO = 95:5 wt %. local coefficient (d33) these films 12 26 pm/V, which correlates well structural device (widely known nanogenerator, PENG) studies. Our investigations enable be used place PVDF-TrFe, is cost-effective solution devices.

Language: Английский

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Efficiently Fabricated Core‐Sheath Piezoelectric Sensor Based on PVDF Microfibrillar Bundle

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 6, 2024

Abstract With the rapid development of information technology (e.g., Internet Things (IoT) and artificial intelligence (AI)), piezoelectric sensor (i.e., nanogenerator, PENG) receives an increasing number attention in field self‐powered wearable devices. Taking fiber as example, it shows promising application for devices owing to its light weight high flexibility compared with block electronic However, still remains a challenge fabricate low‐cost high‐performance via large‐scale but efficient method. In this study, extrusion molding leaching, core‐sheath is facilely fabricated, whose core sheath layer are respectively slender steel wire electrode) PVDF microfibrillar bundle (PMB) layer). Such decent output performance both pressing (12.3 V) bending (0.32 mode. Meanwhile, possesses sensitive stress responsiveness when serving sensing. Furthermore, such sensors can realize signal transmission human motion monitoring, showing potential future. This work proposes method fabricating microfibril based fiber, opening new pathway develop following concept polymer “structuring” processing.

Language: Английский

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Unleashing the Potential: Strategies for Enhancing Performance of Electrospun PVDF-Based Piezoelectric Nanofibrous Membranes

Fibers and Polymers, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Language: Английский

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Wearable flexible sensors based on electrospun PVDF and its Copolymer nanofibers: review

Journal of Materials Science Materials in Electronics, Journal Year: 2024, Volume and Issue: 35(31)

Published: Nov. 1, 2024

Language: Английский

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