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.

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.

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.

Study of Photoelectrochemical Solar Cell Using WSe2 Crystal

2013 ◽  
Vol 665 ◽  
pp. 330-335 ◽  
Author(s):  
Ripal Parmar ◽  
Dipak Sahay ◽  
R.J. Pathak ◽  
R.K. Shah
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Fill Factor ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Open Circuit ◽  
Cell Parameters ◽  
Photoelectrochemical Solar Cell ◽  
Photoelectrochemical Solar Cells

The solar cells have been used as most promising device to convert light energy into electrical energy. In this paper authors have attempted to fabricate Photoelectrochemical solar cell with semiconductor electrode using TMDCs. The Photoelectrochemical solar cells are the solar cells which convert the solar energy into electrical energy. The photoelectrochemical cells are clean and inexhaustible sources of energy. The photoelectrochemical solar cells are fabricated using WSe2crystal and electrolyte solution of 0.025M I2, 0.5M NaI, 0.5M Na2SO4. Here the WSe2crystals were grown by direct vapour transport technique. In our investigations the solar cell parameters like short circuit current (Isc) and Open circuit voltage (Voc) were measured and from that Fill factor (F.F.) and photoconversion efficiency (η) are investigated. The results obtained shows that the value of efficiency and fill factor of solar cell varies with the illumination intensities.

scholarly journals Optimization of Method and Components of Enzymatic Fuel Cells

2019 ◽  
pp. 143-146
Author(s):  
Ibukun Akinsola ◽  
Aderemi Babatunde Alabi ◽  
Muibat A Soliu ◽  
Taiye Akomolafe
Keyword(s):  
Fuel Cells ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Open Circuit ◽  
Biofuel Cell ◽  
Carbon Electrodes

Enzymatic fuel cells produce electrical power by oxidation of renewable energy sources. An enzymatic glucose biofuel cell uses glucose as fuel and enzymes as biocatalyst, to convert biochemical energy into electrical energy. The applications which need low electrical voltages and low currents have much of the interest in developing enzymatic fuel cells. The cell was constructed using three different materials with different electrodes (Bitter leaf and Copper electrodes (BCu), Bitter leaf and Carbon electrodes (BC) and Water leaf and Carbon electrodes (WC)). The short circuit current and open circuit voltage were measured in micro-ampere (mu A) and milli-volt (mV) respectively at 30 minutes interval over the period of 12 hours (from dawn to dusk). The results which show that fuel cells constructed using bitter leaf with carbon electrode has the highest open circuit voltage, short circuit current and generated power of 162.8~mV, 1.65~ mu A and 268.62~nW respectively at 720~mins is obtained from the plots generated by the use of Microsoft Excel. The results show that all short circuit currents, voltages and powers generated increases with time and this is as a result of the exposure to solar radiation during the period of taking the measurement.

scholarly journals Modelling and Efficiency Analysis of InGaP/GaAs Single Junction PV cells with BSF

2019 ◽  
Vol 8 (6) ◽  
pp. 623-627 ◽  
Keyword(s):  
Fill Factor ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Past Research ◽  
Open Circuit ◽  
Simulation Software ◽  
Optical Characteristics ◽  
Tcad Simulation ◽  
Silvaco Atlas

The purposes of PV cells are to transfer light energy into electrical energy. A compelling BSF is a key basic component for a productive PV cell.. In this paper, two significant materials GaAs and InGaP with top BSF and base BSF cells are researched utilizing the computational numerical modelling TCAD tool based Silvaco ATLAS. Past research observed that on the current coordinating condition with top BSF layer and base BSF layer, the cell show a general upgrade of density in Isc (short circuit current ) and Voc (open circuit voltage ) subsequently improving the overall efficiency of the cell. In this paper, structure of various thin film PV cells based on III-V materials e.g. GaN, InGaN have been used to design the multi junction PV cells. Extraction of figures of merits (efficiency, open circuit OC voltage, short circuit SC current and fill factor), simulation of electrical and optical characteristics of these devices have been carried out in this work. Our focus is to improve the optical characteristics, refractive index and absorption coefficient of InGaP with BSF and tunnelling features. In this paper complete Simulation and experimental results are shown and compared. The objective of this paper is to examine the productivity of InGaP/GaAs PV cells utilizing the Silvaco Atlas TCAD simulation software.

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.

scholarly journals A stretchable triboelectric nanogenerator made of silver-coated glass microspheres for human motion energy harvesting and self-powered sensing applications

2021 ◽  
Vol 12 ◽  
pp. 402-412
Author(s):  
Hui Li ◽  
Yaju Zhang ◽  
Yonghui Wu ◽  
Hui Zhao ◽  
Weichao Wang ◽  
...  
Keyword(s):  
Mechanical Energy ◽  
Short Circuit ◽  
Human Motion ◽  
Operating Conditions ◽  
The Body ◽  
Triboelectric Nanogenerator ◽  
Glass Microspheres ◽  
Coated Glass ◽  
Sensing Applications ◽  
Motion Energy

Wearable triboelectric nanogenerators (TENGs) have recently attracted great interest because they can convert human biomechanical energy into sustainable electricity. However, there is a need for improvement regarding the output performance and the complex fabrication of TENG devices. Here, a triboelectric nanogenerator in single-electrode mode is fabricated by a simple strategy, which involves a sandwich structure of silicone rubber and silver-coated glass microspheres (S-TENG). The S-TENG exhibits a remarkable performance in harvesting human motion energy and as flexible tactile sensor. By optimizing the device parameters and operating conditions, the maximum open-circuit voltage and short-circuit current of the S-TENG can reach up to 370 V and 9.5 μA, respectively. The S-TENG with good stretchability (300%) can be produced in different shapes and placed on various parts of the body to harvest mechanical energy for charging capacitors and powering LED lights or scientific calculators. In addition, the good robustness of the S-TENG satisfies the needs of reliability for flexible tactile sensors in realizing human–machine interfaces. This work expands the potential application of S-TENGs from wearable electronics and smart sensing systems to real-time robotics control and virtual reality/augmented reality interactions.

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 Thermophotovoltaic applications in waste heat recovery systems: example of GaSb cell

2019 ◽  
Vol 15 (2) ◽  
pp. 277-286
Author(s):  
Zafer Utlu
Keyword(s):  
High Temperature ◽  
Energy Conversion ◽  
Alternative Energy ◽  
Waste Heat ◽  
Cell Structure ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Open Circuit ◽  
Source Temperature

Abstract In this study, it is aimed at evaluating real data in high temperature GaSb cell thermophotovoltaic (TPV) systems. The TPV systems are considered as an alternative energy source in terms of efficient use of waste heat, cost and efficiency. The TPV system can be defined as a system that converts waste heat energy emitted from heat sources into electrical energy at high temperature. In this context, efficiency and parameters of TPV GaSb cells have been determined in laboratory conditions. The conversion of the high temperature applied to the cell to electrical energy has been investigated by selecting the GaSb photovoltaic cell as the cell type. According to the analysis have been done so far, TPV high-temperature real graphics have been obtained using GaSb cell. The temperature parameters used are, namely, cell temperature and source temperature. With these graphs, energy efficiency, fill factor, effect of open-circuit voltage and short-circuit current values have been determined. While the efficiency value of the GaSb TPV cell systems was calculated, the radiation source temperature values have been taken in increments of 300 K between 1300 and 3100 K. In this analysis, the optimum energy conversion efficiency values of GaSb solar cell structure have been detected to be 21.57%. Opinions about the feasibility, efficiency and development of thermophotovoltaic energy conversion systems are stated, and suggestions are presented.

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