Highly Transparent and Flexible All-Nanofiber-Based Piezocomposite Containing BaTiO3-Embedded P(VDF-TrFE) Nanofibers for Harvesting and Monitoring Human Kinetic Movements

IF 17.2 1区 工程技术 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Advanced Fiber Materials Pub Date : 2024-05-17 DOI:10.1007/s42765-024-00406-8
Kiyong Kim, Daekyu Choi, Sangmin Ji, Freddy Baltazar Iniguez, Young Jae Song, Sam S. Yoon, Junki Kim, Seongpil An
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Abstract

We developed kinetic energy-harvestable and kinetic movement-detectable piezoelectric nanogenerators (PENGs) consisting of piezoelectric nanofiber (NF) mats and metal-electroplated microfiber (MF) electrodes using electrospinning and electroplating methods. Percolative non-woven structure and high flexibility of the NF mats and MF electrodes allowed us to achieve highly transparent and flexible piezocomposites. A viscoelastic solution, mixed with P(VDF-TrFE) and BaTiO3, was electrospun into piezoelectric NFs with a piezoelectric coefficient d33 of 21.2 pC/N. In addition, the combination of electrospinning and electroplating techniques enabled the fabrication of Ni-plated MF-based transparent conductive electrodes (TCEs), contributing to the high transparency of the resulting piezocomposite. The energy-harvesting efficiencies of the BaTiO3-embedded NF-based PENGs with transmittances of 86% and 80% were 200 and 240 V/MPa, respectively, marking the highest values in their class. Moreover, the output voltage driven by the coupling effect of piezoelectricity and triboelectricity during finger tapping was 25.7 V. These highly efficient energy-harvesting performances, along with the transparent and flexible features of the PENGs, hold great promise for body-attachable energy-harvesting and sensing devices, as demonstrated in this study.

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基于全纳米纤维的高透明柔性压电复合材料,其中含有嵌入式 P(VDF-TrFE)纳米纤维,可用于采集和监测人体运动
我们利用电纺丝和电镀方法,开发出了由压电纳米纤维(NF)毡和金属电镀微纤维(MF)电极组成的可收集动能和可检测动能运动的压电纳米发电机(PENGs)。纳米纤维毡和微纤维电极的无纺结构和高柔性使我们能够获得高透明度和柔性的压电复合材料。用 P(VDF-TrFE)和 BaTiO3混合的粘弹性溶液电纺成压电 NF,其压电系数 d33 为 21.2 pC/N。此外,结合电纺丝和电镀技术,还制备出了镀镍的基于 MF 的透明导电电极 (TCE),从而提高了压电复合材料的透明度。嵌入 BaTiO3 的 NF 基 PENG 的能量收集效率分别为 200 V/MPa 和 240 V/MPa,透射率分别为 86% 和 80%,是同类产品中的最高值。此外,在手指敲击过程中,由压电和三电耦合效应驱动的输出电压为 25.7 V。如本研究所示,这些高效的能量收集性能以及 PENG 的透明和柔性特点,为可贴身的能量收集和传感设备带来了巨大的前景。
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来源期刊
CiteScore
18.70
自引率
11.20%
发文量
109
期刊介绍: Advanced Fiber Materials is a hybrid, peer-reviewed, international and interdisciplinary research journal which aims to publish the most important papers in fibers and fiber-related devices as well as their applications.Indexed by SCIE, EI, Scopus et al. Publishing on fiber or fiber-related materials, technology, engineering and application.
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