Epsita Kar, Sourav Maity, Animesh Kar, Shrabanee Sen
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The proof-of-concept of designing the flexible triboelectric energy harvester (TEH) using RHA/PVDF as a functional layer is studied. The fabricated lightweight, wearable TEH can generate a maximum voltage, current, and power density of ~ 463 V, 30 µAmp, and 1.94 mW.cm<sup>−2</sup>, respectively, under repetitive finger imparting. This significantly enhanced output performance of the optimized TEH is attributed to the coupling of the piezoelectric effect with the triboelectric phenomenon inside the device under each cycle of operation. Owing to the good dynamic pressure sensitivity, the device is quite capable of sensing and scavenging energy from the fine motions of fingers as well as other body joints. Finally, the device was used to assemble self-powered smart sensors in order to conduct smart home and smart library operations. The smart switches can operate the smart home electronic appliances wirelessly from the interior/exterior of the room of the respective building. 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引用次数: 0
摘要
智能、可穿戴和自供电设备的需求不断扩大，引发了人们对理想电源的关注。同样，智能电子产品的使用日益增多，也不断加重了电子垃圾（e-waste）的负担。因此，在当今世界，一个由环保材料组成并具有足够功率密度的合适电源是非常令人羡慕的。本文展示了一种基于农业废弃物稻壳灰（RHA）/聚偏二氟乙烯（PVDF）的柔性三电能收集装置的设计和制造。富含二氧化硅（SiO2）的稻壳灰有效地改变了生物相容性聚偏二氟乙烯（PVDF）的微观结构，并有效地提高了电活性相分数。研究验证了使用 RHA/PVDF 作为功能层设计柔性三电能收集器（TEH）的概念。制造出的轻型可穿戴 TEH 在手指重复传授下可产生最大电压、电流和功率密度，分别为 ~ 463 V、30 µAmp 和 1.94 mW.cm-2。优化 TEH 输出性能的大幅提高归功于压电效应与器件内部的三电现象在每个工作循环中的耦合。由于具有良好的动态压力灵敏度，该装置能够很好地从手指和其他身体关节的微小运动中感应和吸收能量。最后，该装置被用来组装自供电智能传感器，以进行智能家居和智能图书馆操作。智能开关可以从相应建筑的室内/室外无线操作智能家居电子设备。在智能图书馆应用中，智能传感器产生的信号可以向图书管理员或用户传递书架上某本书的占用和空闲位置等有用信息。这种可持续的生物有机器件具有填料的生物可降解性、器件的易加工性、出色的生物机械能采集能力以及物联网应用的功效，为下一代智能人工智能（AI）和物联网（IoT）应用的高效、灵活、自供电机电系统铺平了道路。
Agricultural waste rice husk/poly(vinylidene fluoride) composite: a wearable triboelectric energy harvester for real-time smart IoT applications
The ever-expanding demand for smart, wearable, and self-powered devices raises concerns regarding desirable power supplies. Again, this growing use of smart electronics continuously increases the burden on electronic waste (e-waste). Thus, a suitable power supply composed of environmentally friendly materials and assisted by adequate power density is quite enviable in today’s world. Herein, the designing and fabrication of an agricultural waste rice husk ash (RHA)/poly(vinylidene fluoride) (PVDF)-based flexible triboelectric energy harvesting device are demonstrated. The silica (SiO2)-enriched RHA effectively engineered the microstructure of the bio-compatible PVDF and effectively enhanced the electroactive phase fraction. The proof-of-concept of designing the flexible triboelectric energy harvester (TEH) using RHA/PVDF as a functional layer is studied. The fabricated lightweight, wearable TEH can generate a maximum voltage, current, and power density of ~ 463 V, 30 µAmp, and 1.94 mW.cm−2, respectively, under repetitive finger imparting. This significantly enhanced output performance of the optimized TEH is attributed to the coupling of the piezoelectric effect with the triboelectric phenomenon inside the device under each cycle of operation. Owing to the good dynamic pressure sensitivity, the device is quite capable of sensing and scavenging energy from the fine motions of fingers as well as other body joints. Finally, the device was used to assemble self-powered smart sensors in order to conduct smart home and smart library operations. The smart switches can operate the smart home electronic appliances wirelessly from the interior/exterior of the room of the respective building. In smart library applications, the signal generated from the smart sensors can convey useful information to the librarian or the users regarding occupied and empty positions of a particular book on a bookshelf. With the bio-degradable nature of the filler, easy processing of the device, excellent biomechanical energy harvesting capability, and efficacy towards IoT applications, this sustainable bio-organic device paves the way towards effective, flexible, self-powered electromechanical systems for next-generation smart artificial intelligence (AI) and Internet of Things (IoT) applications.
期刊介绍：
Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field.
The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest.
Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials.
Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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