Cowpea-structured PVDF/ZnO nanofibers based flexible self-powered piezoelectric bending motion sensor towards remote control of gestures

Deng, Weili; Yang, Tao; Jin, Long; Li, Huaming; Huang, Haichao; Chu, Xiang; Wang, Zixing; Xiong, Deping; Tian, Guo; Gao, Yuyu; Zhang, Haitao

doi:10.1016/j.nanoen.2018.10.049

Cited by 352 publications

(191 citation statements)

References 54 publications

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“…Among them, electrospinning has attracted more attention since it can industrially fabricate fibers with controllable diameter and assembled direction. Various piezo fibers have been successfully synthesized via this method and have been applied in mechanical energy harvesting …”

Section: Device Designmentioning

confidence: 99%

“…The human motion has the feature of large‐amplitude movements at low frequencies. Therefore, the FPENGs for human applications usually coupled the piezoelectric patch through direct straining or impacted the kinetic driving source . The FPENGs possess several advantages for human mechanical energy scavenging since they are flexible and breathable.…”

Section: Device Designmentioning

confidence: 99%

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Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

et al. 2019

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body is actually a tremendous storehouse of energy that is generated from body heat and motion. [15][16][17][18][19] Power generation from breathing, heating, blood transport, arm motion, typing, and walking could reach to over 100 W for a 68 kg adult's daily activities (Figure 1). [20] Thus, converting 1% of power from the human body may be enough to support the work of most portable electronics.In the past two decades, researchers have developed several energy conversion devices based on piezoelectricity, electrostaticity, triboelectricity, or thermoelectricity that can directly harvest the mechanical or thermal energy and convert it into electric energy (these conversion devices are so-called nanogenerators (NGs)). [21][22][23][24][25] The first nanogenerator (NG) based on ZnO was invented by Prof. Wang in 2006; after that, various NGs were developed to harvest the mechanical or thermal energy with the output performance increasing gradually. [26] These NGs are easy-to-construct flexible devices since most materials for these devices are polymers and nanomaterials. Generally, the flexible devices assembled by film materials can be stretchable and bendable in one direction. But their lack of air-permeability, poor 3D deformation, and low damage tolerance limit their application, especially for wearable electronics. Therefore, fiberbased energy conversion devices have been designed. [27] These fiber-based devices can also be knitted to yarn or fabric in the clothing system to build up a large area electronic system. [28,29] The energy generation and internal charging can be realized by means of a self-powered system that harvests the energy from natural sources around the human body to sustain the wearable electronics. [30][31][32] The search for functional materials that possess good conversion efficiency, as well as great mechanical and environmental stability, combined with a novel device design might push these devices to meet the requirement of a practical application. In the past decade, numerous contributions have been offered to improve the performance of fiber-based energy conversion devices (FBECD) and extend its application. This review specifically summarizes FBECD with different energy conversion mechanisms including piezoelectricity, electrostaticity, triboelectricity, and thermoelectricity in recent processes (Figure 2). The functional materials, fiber fabrication techniques, and device design strategies for different classes of FBECDs are covered in the article. We also introduce an overview of the fiber-based self-powered system and sensors and Following the rapid development of lightweight and flexible smart electronic products, providing energy for these electronics has become a hot research topic. The human body produces considerable mechanical and thermal energy during daily activities, which could be used to power most wearable electronics. In this context, fiber-based energy conversion devices (FBECD) are proposed as candidates for effective conversion of human-body energy into electricity...

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Section: Device Designmentioning

confidence: 99%

Section: Device Designmentioning

confidence: 99%

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

et al. 2019

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“…The response time is a very important factor for a sensor as it shows how fast the response can be detected after the excitation (the impact in this case) is applied [7,8,23]. The response time of a sensor can be defined as the time required for reaching the maximum voltage output which is calculated as the time period of the voltage output changing from 10% to 90% of its peak value.…”

Section: Effect Of the Impact Height On The Teng Voltage Outputmentioning

confidence: 99%

Real-time diagnosis of small energy impacts using a triboelectric nanosensor

Garcia

Trendafilova

2019

Sensors and Actuators A: Physical

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Recently, triboelectric nanogenerators (TENGs) are generating increasing interest due to their important applications as energy harvesters and self-powered active sensors for pressures, vibrations and other mechanical motions. However, there is still little research within the research community on their potential as selfpowered impact sensors. This paper considers the development of a novel triboelectric nanogenerator, which is prepared using a simple and economic fabrication process based on electrospinning. Furthermore, the paper studies the changes in the generated electric response caused by small energy impacts. For the purpose, the TENG electric outputs generated by the impact of a free-falling ball dropped from different heights are investigated. The idea is to investigate the relation between the electric responses of the nanogenerator and the energy of the impact.The experimental results demonstrate that the voltage and current outputs increase linearly with the increase of the impact energy. Moreover, the electric responses of the triboelectric nanogenerator show a very high sensitivity (14 V/J) to the changes in the impact energy and good repeatability. The main achievements of this paper are in the development of novel triboelectric nanogenerator composed of polyvinylidene fluoride nanofibers and a thin film of polypropylene, and its successful application as an impact sensor for real-time assessment of small energy impacts. 2 1 Introduction An impact sensor plays a critical role in vehicle safety, fast medical assistance of elderlies and structural health monitoring. For example, in the event of a car crash an impact sensor detects the collision to release an air-bag for the protection of the passengers. In the case of falls in the elderly, an impact sensor can be used to inform about the accident and provide a fast-medical assistance. Other practical examples could be detection of impacts in hail storms, where impacts are responsible for a considerable number of accidents in aircrafts, wind turbines and other civil infrastructures. Therefore, the sensing and the quantification of impacts is of vital importance for a number of applications as impacts can seriously affect the health and safety of humans. Recently, various approaches have been developed and applied for detection and measurement of impacts in environment as for example piezoelectric sensors [1, 2], capacitive sensors [3], optical sensors [4], acoustic sensors [5] and vibration sensors [6]. Special attention deserves the works of Yang's group [7, 8] which investigates the applications of flexible piezoelectric sensors for detection and measurement of pressures, which can be used for important applications as sleeping monitoring, tactile measurements, or sensing of human heartbeats. Additionally, other authors as [9]investigated the potential of piezoelectric nanogenerators as acceleration sensors for real-time collision monitoring, which has important applications as vehicle safety monitoring. However, most of these technologies require...

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“…[1][2][3][4][5][6][7] In recent years, a lot of effort and attention has been paid to mechanical energy-harvesting technologies. [8][9][10][11][12][13][14][15] These technologies can be divided into three types according to working principles, including piezoelectric nanogenerators (PENGs) based on piezoelectricity, [16][17][18][19][20][21][22][23] electromagnetic generators (EMGs) based on electromagnetic induction, 24,25 and triboelectric nanogenerators (TENGs) based on the coupling of triboelectrification and electrostatic induction. [26][27][28][29][30][31] However, PENGs, with relatively lower output, are fabricated by using piezoelectric materials which are synthesized through a series of complex procedures, making the device construction low cost-effective.…”

Section: Introductionmentioning

confidence: 99%

Building self‐powered emergency electronics based on hybrid nanogenerators for field survival/rescue

Cui

Cao

Guo

et al. 2019

Energy Science & Engineering

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Harvesting energy from human body in multiple ways is pivotal for achieving powering emergency electronics effectively. Herein, we report a hybrid nanogenerator that is based on the coupling of a triboelectric nanogenerator (TENG) and electromagnetic generator (EMG). By utilizing a copper coil in multiroles, the energy grabbing units can operate independently without interfering, revealing a superior performance in scavenging biomechanical energy from human motions. The hybrid device by encapsulation exhibits an excellent environmental stability. When wearing the fabricated device, the TENG and EMG can generate the output voltage about 4 and 1.5 V, respectively, which can be directly stored into a capacitor. By integrating with a battery, the established self‐powered device can actively provide a geographic coordinate in real time in the wild where there is no power supply or network connectivity. Our work paves a way for the further exploration based on hybrid nanogenerators in self‐powered wearable/portable emergency electronics that can be applied in exploration, travel, work, as well as rescue in the wild without power apply and Internet.

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Cowpea-structured PVDF/ZnO nanofibers based flexible self-powered piezoelectric bending motion sensor towards remote control of gestures

Cited by 352 publications

References 54 publications

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

Real-time diagnosis of small energy impacts using a triboelectric nanosensor

Building self‐powered emergency electronics based on hybrid nanogenerators for field survival/rescue

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