Raising the Working Temperature of a Triboelectric Nanogenerator by Quenching Down Electron Thermionic Emission in Contact-Electrification

2018 ◽  
Vol 30 (38) ◽  
pp. 1803968 ◽  
Author(s):  
Cheng Xu ◽  
Aurelia Chi Wang ◽  
Haiyang Zou ◽  
Binbin Zhang ◽  
Chunli Zhang ◽  
...  
Keyword(s):  
Thermionic Emission ◽  
Triboelectric Nanogenerator ◽  
Working Temperature ◽  
Contact Electrification

Mechanism of Contact Electrification

2021 ◽  
Vol 30 (1/2) ◽  
pp. 2-6
Author(s):  
Young-Joon KO ◽  
Dong Woo LEE ◽  
Jonghoon JUNG
Keyword(s):  
Charge Transfer ◽  
Thermionic Emission ◽  
Force Model ◽  
Emission Model ◽  
Intermolecular Force ◽  
Important Research ◽  
Charge Transfer Mechanism ◽  
Contact Electrification ◽  
Schottky Model ◽  
Thermionic Emission Model

Contact electrification has been a well-known phenomenon since B.C. 300. However, the origin of triboelectric charge and the charge transfer mechanism are not well understood. To date, the thermionic emission model, Schottky model, flexoelectric model, and intermolecular force model have been proposed for the contact electrification in conductors, semiconductors, and insulators. This article briefly introduces several important research results on the simple-seeming, but baffling, topic of contact electrification.

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).

Shape-Adaptive, Self-Healable Triboelectric Nanogenerator with Enhanced Performances by Soft Solid–Solid Contact Electrification

ACS Nano ◽  
2019 ◽  
Vol 13 (8) ◽  
pp. 8936-8945 ◽  
Author(s):  
Yanghui Chen ◽  
Xiong Pu ◽  
Mengmeng Liu ◽  
Shuangyang Kuang ◽  
Panpan Zhang ◽  
...  
Keyword(s):  
Triboelectric Nanogenerator ◽  
Solid Contact ◽  
Contact Electrification

scholarly journals Facile Tailoring of Contact Layer Characteristics of the Triboelectric Nanogenerator Based on Portable Imprinting Device

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 872 ◽  
Author(s):  
Sumin Cho ◽  
Sunmin Jang ◽  
Moonwoo La ◽  
Yeongcheol Yun ◽  
Taekyung Yu ◽  
...  
Keyword(s):  
High Strength ◽  
Contact Layer ◽  
Finger Tapping ◽  
Triboelectric Nanogenerator ◽  
Close Attention ◽  
Output Performance ◽  
Contact Electrification ◽  
One Step ◽  
3D Printed ◽  
Electrical Output

Renewable energy harvesting technologies have been actively studied in recent years for replacing rapidly depleting energies, such as coal and oil energy. Among these technologies, the triboelectric nanogenerator (TENG), which is operated by contact-electrification, is attracting close attention due to its high accessibility, light weight, high shape adaptability, and broad applications. The characteristics of the contact layer, where contact electrification phenomenon occurs, should be tailored to enhance the electrical output performance of TENG. In this study, a portable imprinting device is developed to fabricate TENG in one step by easily tailoring the characteristics of the polydimethylsiloxane (PDMS) contact layer, such as thickness and morphology of the surface structure. These characteristics are critical to determine the electrical output performance. All parts of the proposed device are 3D printed with high-strength polylactic acid. Thus, it has lightweight and easy customizable characteristics, which make the designed system portable. Furthermore, the finger tapping-driven TENG of tailored PDMS contact layer with microstructures is fabricated and easily generates 350 V of output voltage and 30 μA of output current with a simple finger tapping motion-related biomechanical energy.

scholarly journals High performance temperature difference triboelectric nanogenerator

2021 ◽  
Vol 12 (1) ◽  
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 ◽  
High Performance ◽  
Thermionic Emission ◽  
Triboelectric Nanogenerator ◽  
Output Performance ◽  
Record Value

AbstractUsually, high temperature decreases the output performance of triboelectric nanogenerator because of the dissipation of triboelectric charges through the thermionic emission. Here, a temperature difference triboelectric nanogenerator is designed and fabricated to enhance the electrical output performance in high temperature environment. As the hotter friction layer’s temperature of nanogenerator is 0 K to 145 K higher than the cooler part’s temperature, the output voltage, current, 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, 19.6 μC m−2, 69 μW to 858 V, 20 μA, 58.8 μC m−2, 206.7 μW). With the further increase of temperature difference from 145 K to 219 K, the surface charge density and output performance gradually decrease. At the optimal temperature difference (145 K), the largest output current density is 443 μA cm−2, which is 26.6% larger than the reported record value (350 μA cm−2).

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