Efficient Triboelectric Nanogenerator (TENG) Output Management for Improving Charge Density and Reducing Charge Loss

2021 ◽  
Vol 3 (2) ◽  
pp. 532-549
Author(s):  
Yifan Wang ◽  
Xin Jin ◽  
Wenyu Wang ◽  
Jiarong Niu ◽  
Zhengtao Zhu ◽  
...  
Keyword(s):  
Charge Density ◽  
Triboelectric Nanogenerator ◽  
Charge Loss

A multi-dielectric-layered triboelectric nanogenerator as energized by corona discharge

Nanoscale ◽  
2017 ◽  
Vol 9 (27) ◽  
pp. 9668-9675 ◽  
Author(s):  
Jia Jia Shao ◽  
Wei Tang ◽  
Tao Jiang ◽  
Xiang Yu Chen ◽  
Liang Xu ◽  
...  
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Corona Discharge ◽  
Surface Charge Density ◽  
High Surface ◽  
Cycling Stability ◽  
Triboelectric Nanogenerator ◽  
Excellent Cycling Stability ◽  
Vertical Contact ◽  
High Surface Charge Density

A multi-dielectric-layered vertical contact-separation mode TENG through a corona discharge approach results in outstanding output performances, i.e., a high surface charge density of 283 μC m−2 and excellent cycling stability (92.6% retention after 200 000 cycles).

scholarly journals Pumping up the charge density of a triboelectric nanogenerator by charge-shuttling

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Huamei Wang ◽  
Liang Xu ◽  
Yu Bai ◽  
Zhong Lin Wang
Keyword(s):  
Charge Density ◽  
Triboelectric Nanogenerator

scholarly journals Rationally patterned electrode of direct-current triboelectric nanogenerators for ultrahigh effective surface charge density

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhihao Zhao ◽  
Yejing Dai ◽  
Di Liu ◽  
Linglin Zhou ◽  
Shaoxin Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Charge Density ◽  
Surface Charge ◽  
Direct Current ◽  
Surface Charge Density ◽  
Large Scale ◽  
Triboelectric Nanogenerator ◽  
Electrode Structure ◽  
Effective Surface ◽  
Self Powered

AbstractAs a new-era of energy harvesting technology, the enhancement of triboelectric charge density of triboelectric nanogenerator (TENG) is always crucial for its large-scale application on Internet of Things (IoTs) and artificial intelligence (AI). Here, a microstructure-designed direct-current TENG (MDC-TENG) with rationally patterned electrode structure is presented to enhance its effective surface charge density by increasing the efficiency of contact electrification. Thus, the MDC-TENG achieves a record high charge density of ~5.4 mC m−2, which is over 2-fold the state-of-art of AC-TENGs and over 10-fold compared to previous DC-TENGs. The MDC-TENG realizes both the miniaturized device and high output performance. Meanwhile, its effective charge density can be further improved as the device size increases. Our work not only provides a miniaturization strategy of TENG for the application in IoTs and AI as energy supply or self-powered sensor, but also presents a paradigm shift for large-scale energy harvesting by TENGs.

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.

Increasing the output charge quantity of triboelectric nanogenerators via frequency multiplication with a multigap-structured friction layer

2020 ◽  
Vol 13 (7) ◽  
pp. 2069-2076
Author(s):  
Nuanyang Cui ◽  
Cuihua Dai ◽  
Jinmei Liu ◽  
Long Gu ◽  
Rui Ge ◽  
...  
Keyword(s):  
Charge Density ◽  
Triboelectric Nanogenerator ◽  
Output Current ◽  
Frequency Multiplication ◽  
Friction Layer ◽  
Triboelectric Nanogenerators ◽  
Gap Structure

The multi-gap structure of friction layer increases the amount of triboelectric charge density and the output current of a triboelectric nanogenerator (TENG).

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).

Chemically Functionalized Cellulose Nanofibrils for Improving Triboelectric Charge Density of a Triboelectric Nanogenerator

2020 ◽  
Vol 8 (50) ◽  
pp. 18678-18685
Author(s):  
Shuangxi Nie ◽  
Chenchen Cai ◽  
Xuejiao Lin ◽  
Chenyuan Zhang ◽  
Yanxu Lu ◽  
...  
Keyword(s):  
Charge Density ◽  
Cellulose Nanofibrils ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document