scholarly journals Spiral Steel Wire Based Fiber-Shaped Stretchable and Tailorable Triboelectric Nanogenerator for Wearable Power Source and Active Gesture Sensor

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Lingjie Xie ◽  
Xiaoping Chen ◽  
Zhen Wen ◽  
Yanqin Yang ◽  
Jihong Shi ◽  
...  
Keyword(s):  
Electronic Device ◽  
Short Circuit ◽  
Steel Wire ◽  
Average Power ◽  
Short Circuit Current ◽  
Human Motion ◽  
Open Circuit ◽  
Triboelectric Nanogenerator ◽  
Single Finger ◽  
Wearable Electronic Device

Abstract Continuous deforming always leads to the performance degradation of a flexible triboelectric nanogenerator due to the Young’s modulus mismatch of different functional layers. In this work, we fabricated a fiber-shaped stretchable and tailorable triboelectric nanogenerator (FST–TENG) based on the geometric construction of a steel wire as electrode and ingenious selection of silicone rubber as triboelectric layer. Owing to the great robustness and continuous conductivity, the FST–TENGs demonstrate high stability, stretchability, and even tailorability. For a single device with ~ 6 cm in length and ~ 3 mm in diameter, the open-circuit voltage of ~ 59.7 V, transferred charge of ~ 23.7 nC, short-circuit current of ~ 2.67 μA and average power of ~ 2.13 μW can be obtained at 2.5 Hz. By knitting several FST–TENGs to be a fabric or a bracelet, it enables to harvest human motion energy and then to drive a wearable electronic device. Finally, it can also be woven on dorsum of glove to monitor the movements of gesture, which can recognize every single finger, different bending angle, and numbers of bent finger by analyzing voltage signals.

scholarly journals A Shared-Electrode and Nested-Tube Structure Triboelectric Nanogenerator for Motion Energy Harvesting

Micromachines ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 656 ◽  
Author(s):  
Zhumei Tian ◽  
Guicheng Shao ◽  
Qiong Zhang ◽  
Yanan Geng ◽  
Xi Chen
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Friction Material ◽  
Human Motion ◽  
Open Circuit ◽  
Triboelectric Nanogenerator ◽  
Force Output ◽  
Motion Energy ◽  
Tube Structure

Triboelectric nanogenerators with the function of harvesting human motion energy have attracted wide attention. Here, we demonstrate a shared-electrode and nested-tube structure triboelectric nanogenerator (SNTN) for harvesting human motion energy. The design of the SNTN employs flexible silicone rubber as the negative friction material and Ni-coated polyester conductive textile as the positive friction material and the electrode material. The entire structure consists of an inner triboelectric unit and an outer triboelectric unit. The inner triboelectric unit is formed by a hollow inner tube and a hollow middle tube, while the hollow middle tube and a hollow outer tube constitute the outer triboelectric unit. The hollow middle tube is used as the shared tube, and the electrode in the middle tube is used as the shared electrode of the two triboelectric units. Our research demonstrates that the output performance of the SNTN was improved significantly compared with a single triboelectric unit due to the cooperation of the two triboelectric units. When the SNTN is pressed by 300 N external force, output open-circuit voltage of 180 V and output short-circuit current of 8.5 μA can be obtained. The output electrical energy can light up 31 light-emitting diodes (LEDs) connected serially (displaying “XZTC”) and can drive a digital clock after rectifying storage, which shows application prospects in the field of illuminating devices and portable electronics.

Fluttering Amplitude Amplification by Utilizing Flapping Moment in Flutter-Driven Triboelectric Nanogenerator

2021 ◽  
Author(s):  
Yi Zhang ◽  
Ka Chung Chan ◽  
Sau Chung Fu ◽  
Christopher Yu Hang Chao
Keyword(s):  
Flow Velocity ◽  
High Speed ◽  
Aerodynamic Force ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Energy Output ◽  
Small Scale ◽  
Triboelectric Nanogenerator ◽  
Peak Value

Abstract Flutter-driven triboelectric nanogenerator (FTENG) is one of the most promising methods to harvest small-scale wind energy. Wind causes self-fluttering motion of a flag in the FTENG to generate electricity by contact electrification. A lot of studies have been conducted to enhance the energy output by increasing the surface charge density of the flag, but only a few researches tried to increase the converting efficiency by enlarging the flapping motion. In this study, we show that by simply replacing the rigid flagpole in the FTENG with a flexible flagpole, the energy conversion efficiency is augmented and the energy output is enhanced. It is found that when the flag flutters, the flagpole also undergoes aerodynamic force. The lift force generated from the fluttering flag applies a periodic rotational moment on the flagpole, and causes the flagpole to vibrate. The vibration of the flagpole, in turn amplifies the flutter of the flag. Both the fluttering dynamics of the flags with rigid and flexible flagpoles have been recorded by a high-speed camera. When the flag was held by a flexible flagpole, the fluttering amplitude and the contact area between the flag and electrode plates were increased. The energy enhancement increased as the flow velocity increased and the enhancement can be 113 times when the wind velocity is 10 m/s. The thickness of the flagpole was investigated. An optimal output of open-circuit voltage reaching 1128 V (peak-to-peak value) or 312.40 V (RMS value), and short-circuit current reaching 127.67 μA (peak-to-peak value) or 31.99 μA (RMS value) at 12.21 m/s flow velocity was achieved. This research presents a simple design to enhance the output performance of an FTENG by amplifying the fluttering amplitude. Based on the performance obtained in this study, the improved FTENG has the potential to apply in a smart city for driving electronic devices as a power source for IoT applications.

scholarly journals Self-Powered Acceleration Sensor Based on Multilayer Suspension Structure and TPU-RTV Film for Vibration Monitoring

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2763
Author(s):  
Xiaotao Han ◽  
Qiyuan Zhang ◽  
Junbin Yu ◽  
Jinsha Song ◽  
Zhengyang Li ◽  
...  
Keyword(s):  
Short Circuit ◽  
Mechanical Vibration ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Vibration Monitoring ◽  
Triboelectric Nanogenerator ◽  
Acceleration Sensor ◽  
Vibration Acceleration ◽  
Self Powered ◽  
Suspension Structure

In this paper, we designed a triboelectric acceleration sensor with excellent multiple parameters. To more easily detect weak vibrations, the sensor was founded on a multilayer suspension structure. To effectively improve the electrical properties of the sensor, a surface roughening and internal doping friction film, which was refined with a room temperature vulcanized silicone rubber (RTV) and some thermoplastic polyurethanes (TPU) powder in a certain proportion, was integrated into the structure. It was found that the optimization of the RTV film increases the open circuit voltage and short circuit current of the triboelectric nanogenerator (TENG) by 223% and 227%, respectively. When the external vibration acceleration is less than 4 m/s2, the sensitivity and linearity are 1.996 V/(m/s2) and 0.999, respectively. Additionally, when it is in the range between 4 m/s2 and 15 m/s2, those are 23.082 V/(m/s2) and 0.975, respectively. Furthermore, the sensor was placed in a simulated truck vibration environment, and its self-powered monitoring ability validated by experiments in real time. The results show that the designed sensor has strong practical value in the field of monitoring mechanical vibration acceleration.

Application of flexible friction nano-generator in human motion information acquisition

2021 ◽  
pp. 1-13
Author(s):  
Leilei Tian ◽  
Cunjun Xie ◽  
Ying Jin
Keyword(s):  
Information Acquisition ◽  
Short Circuit ◽  
Electronic Devices ◽  
Short Circuit Current ◽  
Human Motion ◽  
Open Circuit ◽  
Motion Information ◽  
Negative Materials ◽  
Wearable Electronic ◽  
Wearable Electronic Devices

Under the background of the wide application of intelligent wearable devices, the application of flexible friction nanogenerator in human motion information acquisition is studied. According to the actual needs of energy supply of wearable electronic devices and human motion information acquisition, a flexible friction nanogenerator was prepared by using polyester fiber nickel plated conductive cloth and room temperature vulcanized silica gel polymer as friction positive and negative materials for human motion information acquisition. Set relevant parameters for test. The output peaks of short-circuit current and open circuit voltage are 5 respectively μA and 50 V. The test shows that the output energy can drive the calculator and digital clock to work in real time, and can realize the collection of human motion information.

scholarly journals Textile Manufacturing Compatible Triboelectric Nanogenerator with Alternating Positive and Negative Freestanding Grating Structure

Proceedings ◽  
2020 ◽  
Vol 32 (1) ◽  
pp. 23
Author(s):  
Watcharapong Paosangthong ◽  
Mahmoud Wagih ◽  
Russel Torah ◽  
Steve Beeby
Keyword(s):  
Short Circuit ◽  
Dissimilar Materials ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Triboelectric Nanogenerator ◽  
Induction Effect ◽  
Night Time ◽  
Practical Applications ◽  
Textile Manufacturing ◽  
Wireless Transmitter

This paper demonstrates a novel design of textile-based triboelectric nanogenerator (TENG), which is compatible with standard textile manufacturing. The device can convert kinetic energy occurring during frictional contact between two dissimilar materials into electricity based on contact electrification and the electrostatic induction effect. The TENG can generate an RMS open-circuit voltage of 136 V, an RMS short-circuit current of 2.68 µA and a maximum RMS power of 125 µW (38.8 mW/m2). To demonstrate practical applications, the TENG was embedded into a lab coat. The energy is generated from the relative movement between the arm and torso. Its output was used to drive a digital watch, a wearable night-time warning indicator for pedestrians, a wireless transmitter and a pedometer.

scholarly journals Self-Powered, Hybrid, Multifunctional Sensor for a Human Biomechanical Monitoring Device

2021 ◽  
Vol 11 (2) ◽  
pp. 519
Author(s):  
Yeh Hsin Lu ◽  
Hsiao Han Lo ◽  
Jie Wang ◽  
Tien Hsi Lee ◽  
Yiin Kuen Fuh
Keyword(s):  
Short Term Memory ◽  
Short Circuit ◽  
Average Power ◽  
Human Motion ◽  
Open Circuit ◽  
Monitoring Device ◽  
Multiple Sources ◽  
Piezoelectric Energy ◽  
Self Powered ◽  
Multifunctional Sensor

For personal and daily activities, it is highly desirable to collect energy from multiple sources, not only for charging personal electronics but also for charging devices that may in the future sense and transmit information for healthcare and biomedical applications. In particular, hybridization of triboelectric and piezoelectric energy-harvesting generators with lightweight components and relatively simple structures have shown promise in self-powered sensors. Here, we present a self-powered multifunctional sensor (SPMS) based on hybridization with a novel design of a piezoelectrically curved spacer that functions concurrently with a zigzag shaped triboelectric harvester for a human biomechanical monitoring device. The optimized SPMS had an open-circuit voltage (VOC) of 103 V, short-circuit current (ISC) of 302 µA, load of 100 kΩ, and maximum average power output of 38 mW under the operational processes of compression/deformation/touch/release. To maximize the new sensor’s usage as a gait sensor that can detect and monitor human motion characteristics in rehabilitation circumstances, the deep learning long short-term memory (LSTM) model was developed with an accuracy of the personal sequence gait SPMS signal recognition of 81.8%.

Ag Nanowires Single Electrode Triboelectric Nanogenerator and Its Angle Sensors

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Lu Cheng ◽  
Yi Xi ◽  
Chenguo Hu ◽  
Xule Yue ◽  
Guo Wang
Keyword(s):  
Biomedical Application ◽  
Short Circuit ◽  
Short Circuit Current ◽  
High Specific Surface Area ◽  
Open Circuit ◽  
Mobile Object ◽  
Triboelectric Nanogenerator ◽  
Ag Nanowires ◽  
Self Powered ◽  
New Applications

AbstractAs we known, nanogenerator (NG) can be used in many fields, such as sensors, energy harvesting, biomedical application, and so on. Sometimes, the object that is a part of NG cannot be electrically connected to the load because it is a mobile object. To harvest energy from such a case and reduce the fabrication cost and achieve some new applications such as touch screen products, we need to find new method to fabricate NG. To attain the higher output current and output power, moreover, here we report a flexible and easy fabricated single electrode triboelectric nanogenerator (TENG) based on polydimethylsiloxane (PDMS) and silver (Ag) nanowires (NWs). Due to Ag NWs high specific surface area, the electrical conductivity of Ag NWs is better than the block of Ag, and PDMS is the transparent and flexible. The single electrode TENG not only can harvest energy from environment but also is a self-powered sensor for detecting acceleration from different angles. This TENG can attain an open-circuit voltage up to 330 V, a maximum short-circuit current of 15.5 μ A (2.6 μ A/cm

scholarly journals Omni-directional wind-driven triboelectric nanogenerator with cross-shaped dielectric film

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Yoseop Shin ◽  
Sungjun Cho ◽  
Sejin Han ◽  
Gun Young Jung
Keyword(s):  
Wind Energy ◽  
Dielectric Film ◽  
Mechanical Energy ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Dielectric Films ◽  
Triboelectric Nanogenerator ◽  
External Power ◽  
Triboelectric Nanogenerators

AbstractTriboelectric nanogenerators (TENGs) are actively being researched and developed to become a new external power unit for various electronics and applications. Wind is proposed as a mechanical energy source to flutter the dielectric film in wind-driven TENGs as it is clean, abundant, ubiquitous, and sustainable. Herein, we propose a TENG structure with dielectric films bent in four directions to collect the wind energy supply from all directions, unlike the conventional wind-driven TENGs which can only harvest the wind energy from one direction. Aluminum (Al) layer was intercalated within the dielectric film to improve electrostatic induction, resulting in improved triboelectric performances. Maximum open-circuit voltage (Voc) of 233 V, short-circuit current (Isc) of 348 µA, and output power density of 46.1 W m− 2 at an external load of 1 MΩ under a wind speed of 9 m s− 1 were revealed, and it faithfully lit “LED” characters composed of 25 LEDs.

scholarly journals A Stretchable, Self-Healable Triboelectric Nanogenerator as Electronic Skin for Energy Harvesting and Tactile Sensing

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1689
Author(s):  
Xi Han ◽  
Dongjie Jiang ◽  
Xuecheng Qu ◽  
Yuan Bai ◽  
Yu Cao ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Material Selection ◽  
Short Circuit ◽  
Red Light ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Triboelectric Nanogenerator ◽  
Tactile Sensing ◽  
Electronic Skin ◽  
Self Powered

Electronic skin that is deformable, self-healable, and self-powered has high competitiveness for next-generation energy/sense/robotic applications. Herein, we fabricated a stretchable, self-healable triboelectric nanogenerator (SH-TENG) as electronic skin for energy harvesting and tactile sensing. The elongation of SH-TENG can achieve 800% (uniaxial strain) and the SH-TENG can self-heal within 2.5 min. The SH-TENG is based on the single-electrode mode, which is constructed from ion hydrogels with an area of 2 cm × 3 cm, the output of short-circuit transferred charge (Qsc), open-circuit voltage (Voc), and short-circuit current (Isc) reaches ~6 nC, ~22 V, and ~400 nA, and the corresponding output power density is ~2.9 μW × cm−2 when the matching resistance was ~140 MΩ. As a biomechanical energy harvesting device, the SH-TENG also can drive red light-emitting diodes (LEDs) bulbs. Meanwhile, SH-TENG has shown good sensitivity to low-frequency human touch and can be used as an artificial electronic skin for touch/pressure sensing. This work provides a suitable candidate for the material selection of the hydrogel-based self-powered electronic skin.

scholarly journals Dry-Coated Graphite onto Sandpaper for Triboelectric Nanogenerator as an Active Power Source for Portable Electronics

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1585 ◽  
Author(s):  
Smitha Ankanahalli Shankaregowda ◽  
Rumana Farheen Sagade Muktar Ahmed ◽  
Yu Liu ◽  
Chandrashekar Bananakere Nanjegowda ◽  
Xing Cheng ◽  
...  
Keyword(s):  
Large Scale ◽  
Liquid Crystal Display ◽  
Short Circuit ◽  
Bottom Layer ◽  
Human Motion ◽  
Open Circuit ◽  
Triboelectric Nanogenerator ◽  
Portable Devices ◽  
Wearable Electronics ◽  
Dry Electrode

Developing an eco-friendly, flexible and recyclable micro-structured dry electrode for sustainable life is essential. In this work, we have developed irregular, micro-structured sandpaper coated with graphite powder as an electrode for developing a simple, low-cost, contact-separation mode graphite-coated sandpaper-based triboelectric nanogenerator (GS-TENG) as a self-powered device and biomechanical sensor. The as-fabricated GS-TENG is a dielectric-conductor model. It is made up of a bottom layer with polytetrafluoroethylene (PTFE) as a triboelectric layer, which is attached onto a graphite-coated sandpaper-based electrode and a top layer with aluminum as another triboelectric layer as well as an electrode. The forward and reverse open-circuit voltages reach upto ~33.8 V and ~36.62 V respectively, and the forward and reverse short-circuit currents are ~2.16 µA and ~2.17µA, respectively. The output generated by GS-TENG can power 120 blue light-emitting diodes connected in series, liquid crystal display and can charge commercial capacitors along with the rectifier circuit. The capacitor of 22 µF is charged upto 5 V and is sufficient to drive digital watch as wearable electronics. Moreover, the device can track signals generated by human motion, hence it scavenges biomechanical energy. Thus, GS-TENG facilitates large-scale fabrication and has potential for future applications in wearable and portable devices.

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