scholarly journals Boosting output performance of sliding mode triboelectric nanogenerator by charge space-accumulation effect

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Wencong He ◽  
Wenlin Liu ◽  
Jie Chen ◽  
Zhao Wang ◽  
Yike Liu ◽  
...  
Keyword(s):  
Charge Density ◽  
Sliding Mode ◽  
Mechanical Energy ◽  
Low Frequency ◽  
Deep Understanding ◽  
Triboelectric Nanogenerator ◽  
Ambient Conditions ◽  
Output Performance ◽  
Charge Space ◽  
Air Breakdown

Abstract The sliding mode triboelectric nanogenerator (S-TENG) is an effective technology for in-plane low-frequency mechanical energy harvesting. However, as surface modification of tribo-materials and charge excitation strategies are not well applicable for this mode, output performance promotion of S-TENG has no breakthrough recently. Herein, we propose a new strategy by designing shielding layer and alternative blank-tribo-area enabled charge space-accumulation (CSA) for enormously improving the charge density of S-TENG. It is found that the shielding layer prevents the air breakdown on the interface of tribo-layers effectively and the blank-tribo-area with charge dissipation on its surface of tribo-material promotes charge accumulation. The charge space-accumulation mechanism is analyzed theoretically and verified by experiments. The charge density of CSA-S-TENG achieves a 2.3 fold enhancement (1.63 mC m−2) of normal S-TENG in ambient conditions. This work provides a deep understanding of the working mechanism of S-TENG and an effective strategy for promoting its output performance.

scholarly journals Surface Engineering for Enhanced Triboelectric Nanogenerator

2021 ◽  
Vol 1 (1) ◽  
pp. 58-80
Author(s):  
Mervat Ibrahim ◽  
Jinxing Jiang ◽  
Zhen Wen ◽  
Xuhui Sun
Keyword(s):  
High Performance ◽  
Surface Engineering ◽  
Mechanical Energy ◽  
High Vacuum ◽  
Low Frequency ◽  
Triboelectric Nanogenerator ◽  
Output Performance ◽  
High Charge Density ◽  
Output Characteristics ◽  
High Output

Triboelectric nanogenerator (TENG) is the new technique that can convert low-frequency mechanical energy into effective electricity. As an energy collector, the pursuit of high output characteristics is understandable. Although high charge density has been achieved by working in high vacuum or charge pumping techniques, it remains challenging to obtain the high output performance directly in the atmosphere. Herein, surface-engineering of the triboelectric layer for enhancing output performance has been reviewed carefully. By constructing surface morphology or developing surface modification, high performance of TENGs is finally presented in the review.

scholarly journals Author Correction: Boosting output performance of sliding mode triboelectric nanogenerator by charge space-accumulation effect

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Wencong He ◽  
Wenlin Liu ◽  
Jie Chen ◽  
Zhao Wang ◽  
Yike Liu ◽  
...  
Keyword(s):  
Sliding Mode ◽  
Triboelectric Nanogenerator ◽  
Output Performance ◽  
Accumulation Effect ◽  
Charge Space

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

scholarly journals High performance floating self-excited sliding triboelectric nanogenerator for micro mechanical energy harvesting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Li Long ◽  
Wenlin Liu ◽  
Zhao Wang ◽  
Wencong He ◽  
Gui Li ◽  
...  
Keyword(s):  
Charge Density ◽  
High Performance ◽  
Mechanical Energy ◽  
Triboelectric Nanogenerator ◽  
Maximum Charge ◽  
Charge Decay ◽  
Air Breakdown ◽  
Weak Wind ◽  
Breakdown Model ◽  
High Output

AbstractNon-contact triboelectric nanogenerator (TENG) enabled for both high conversion efficiency and durability is appropriate to harvest random micro energy owing to the advantage of low driving force. However, the low output (<10 μC m−2) of non-contact TENG caused by the drastic charge decay limits its application. Here, we propose a floating self-excited sliding TENG (FSS-TENG) by a self-excited amplification between rotator and stator to achieve self-increased charge density, and the air breakdown model of non-contact TENG is given for a maximum charge density. The charge density up to 71.53 μC m−2 is achieved, 5.46 times as that of the traditional floating TENG. Besides, the high output enables it to continuously power small electronics at 3 m s−1 weak wind. This work provides an effective strategy to address the low output of floating sliding TENG, and can be easily adapted to capture the varied micro mechanical energies anywhere.

scholarly journals High Performance Temperature Difference Triboelectric Nanogenerator

2020 ◽  
Author(s):  
Bolang Cheng ◽  
Qi Xu ◽  
Yaqin Ding ◽  
Suo Bai ◽  
Xiaofeng Jia ◽  
...  
Keyword(s):  
High Temperature ◽  
Charge Density ◽  
Surface Charge ◽  
Temperature Difference ◽  
Surface Charge Density ◽  
Thermionic Emission ◽  
Triboelectric Nanogenerator ◽  
Emission Model ◽  
Continuous Increase ◽  
Output Performance

Abstract Usually, high temperature decreases the output performance of triboelectric nanogenerator (TENG) because of the dissipation of triboelectric charges through the thermionic emission. It would be highly valuable if the high temperature can be used to enhance the output performance of TENG. In this paper, through a simulation combining the electron-cloud-potential-well model for triboelectrification and the thermionic-emission model, we find that there exists an optimum temperature difference ∆T between friction layers under which the output of TENG is maximum. Based on this, a type of contact-separation temperature difference TENG with controllable friction layer temperature (TDNG) is designed and fabricated to enhance the electrical output performance in temperature difference environment. As the temperature difference ∆T increasing from 0 K to 145 K, the output voltage, current, the surface charge density and output power are increased 2.7, 2.2, 3.0 and 2.9 times, respectively (from 315 V, 9.1 μA, 47 nC/m2, 69 μW to 858 V, 20 μA, 0.14 μC/m2, 206.7 μW). Then with the continuous increase of ∆T to 219 K, the surface charge density and output performance gradually decrease. At the optimal temperature difference (145 K), the biggest output current density (396 μA/cm2) has been obtained, which is 13% larger than the reported record value (350 μA/cm2).

Flexible Triboelectric Nanogenerator Based on Polyester Conductive Cloth for Biomechanical Energy Harvesting and Self-Powered Sensors

Nanoscale ◽  
2021 ◽  
Author(s):  
Junwei Zhao ◽  
Yujiang Wang ◽  
Xiaojiang Song ◽  
Anqi Zhou ◽  
Yunfei Ma ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Mechanical Energy ◽  
Low Frequency ◽  
Triboelectric Nanogenerator ◽  
Self Powered

As a new nanotechnology of mechanical energy harvesting and self-powered sensing, triboelectric nanogenerator (TENG) has been explored as a new path of using various low-frequency disordered mechanical energies in the...

Harvesting Low-Frequency (<5 Hz) Irregular Mechanical Energy: A Possible Killer Application of Triboelectric Nanogenerator

ACS Nano ◽  
2016 ◽  
Vol 10 (4) ◽  
pp. 4797-4805 ◽  
Author(s):  
Yunlong Zi ◽  
Hengyu Guo ◽  
Zhen Wen ◽  
Min-Hsin Yeh ◽  
Chenguo Hu ◽  
...  
Keyword(s):  
Mechanical Energy ◽  
Low Frequency ◽  
Triboelectric Nanogenerator

Triboelectric nanogenerators as new energy technology and self-powered sensors – Principles, problems and perspectives

2014 ◽  
Vol 176 ◽  
pp. 447-458 ◽  
Author(s):  
Zhong Lin Wang
Keyword(s):  
Energy Harvesting ◽  
Charge Density ◽  
Energy Conversion ◽  
Daily Life ◽  
Mechanical Energy ◽  
Ocean Waves ◽  
Human Motion ◽  
Triboelectric Nanogenerator ◽  
Standard Material ◽  
Self Powered

Triboelectrification is one of the most common effects in our daily life, but it is usually taken as a negative effect with very limited positive applications. Here, we invented a triboelectric nanogenerator (TENG) based on organic materials that is used to convert mechanical energy into electricity. The TENG is based on the conjunction of triboelectrification and electrostatic induction, and it utilizes the most common materials available in our daily life, such as papers, fabrics, PTFE, PDMS, Al, PVCetc.In this short review, we first introduce the four most fundamental modes of TENG, based on which a range of applications have been demonstrated. The area power density reaches 1200 W m−2, volume density reaches 490 kW m−3, and an energy conversion efficiency of ∼50–85% has been demonstrated. The TENG can be applied to harvest all kinds of mechanical energy that is available in our daily life, such as human motion, walking, vibration, mechanical triggering, rotation energy, wind, a moving automobile, flowing water, rain drops, tide and ocean waves. Therefore, it is a new paradigm for energy harvesting. Furthermore, TENG can be a sensor that directly converts a mechanical triggering into a self-generated electric signal for detection of motion, vibration, mechanical stimuli, physical touching, and biological movement. After a summary of TENG for micro-scale energy harvesting, mega-scale energy harvesting, and self-powered systems, we will present a set of questions that need to be discussed and explored for applications of the TENG. Lastly, since the energy conversion efficiencies for each mode can be different although the materials are the same, depending on the triggering conditions and design geometry. But one common factor that determines the performance of all the TENGs is the charge density on the two surfaces, the saturation value of which may independent of the triggering configurations of the TENG. Therefore, the triboelectric charge density or the relative charge density in reference to a standard material (such as polytetrafluoroethylene (PTFE)) can be taken as a measuring matrix for characterizing the performance of the material for the TENG.

scholarly journals Flexible Layered-Graphene Charge Modulation for Highly Stable Triboelectric Nanogenerator

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2276
Author(s):  
Mamina Sahoo ◽  
Sz-Nian Lai ◽  
Jyh-Ming Wu ◽  
Ming-Chung Wu ◽  
Chao-Sung Lai
Keyword(s):  
Charge Density ◽  
Flexible Electronics ◽  
Mechanical Energy ◽  
Charge Trapping ◽  
Triboelectric Nanogenerator ◽  
Multilayer Graphene ◽  
Layer By Layer ◽  
Graphene Layers ◽  
High Dielectric ◽  
A Charge

The continuous quest to enhance the output performance of triboelectric nanogenerators (TENGs) based on the surface charge density of the tribolayer has motivated researchers to harvest mechanical energy efficiently. Most of the previous work focused on the enhancement of negative triboelectric charges. The enhancement of charge density over positive tribolayer has been less investigated. In this work, we developed a layer-by-layer assembled multilayer graphene-based TENG to enhance the charge density by creatively introducing a charge trapping layer (CTL) Al2O3 in between the positive triboelectric layer and conducting electrode to construct an attractive flexible TENG. Based on the experimental results, the optimized three layers of graphene TENG (3L-Gr-TENG) with CTL showed a 30-fold enhancement in output power compared to its counterpart, 3L-Gr-TENG without CTL. This remarkably enhanced performance can be ascribed to the synergistic effect between the optimized graphene layers with high dielectric CTL. Moreover, the device exhibited outstanding stability after continuous operation of > 2000 cycles. Additionally, the device was capable of powering 20 green LEDs and sufficient to power an electronic timer with rectifying circuits. This research provides a new insight to improve the charge density of Gr-TENGs as energy harvesters for next-generation flexible electronics.

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