Effects of Environmental Atmosphere on the Performance of Contact–Separation Mode TENG

Han, Kai; Tang, Wei; Chen, Jian; Luo, Jianjun; Xu, Liang; Wang, Zhong Lin

doi:10.1002/admt.201800569

Cited by 25 publications

(20 citation statements)

References 50 publications

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“…It was found that the dielectric material can gain more electrons due to the chemical bond formed between O 2 and the dielectric material. 7 On the contrary, in our research CE performance is lowered. We anticipate that the chemical bond between O 2 and the polymer cannot be formed under the low O 2 concentration, in which the influence mechanism on CE is similar to that of O 3 .…”

Section: Resultscontrasting

confidence: 67%

“…In the previous work, CE was performed at the pure O 2 condition between Pt/Ir and dielectrics. It was found that the dielectric material can gain more electrons due to the chemical bond formed between O 2 and the dielectric material . On the contrary, in our research CE performance is lowered.…”

Section: Resultscontrasting

confidence: 64%

“…However, the mechanism of CE is ambiguous when the atmosphere is involved in CE. Fortunately, the Triboelectric Nanogenerator (TENG) provides a method to study the mechanism of CE. − It was demonstrated that the atmosphere has significant impact on CE in macroscale and microscale, and charge transfer during CE is variable because of different pure gas (such as O 2 , N 2 , Ar, CO 2 , and so forth) and pressures. , Also, the triboelectrification between the dielectric material and the liquid metal exhibited reverse polarity of the charge transfer under N 2 atmosphere . Also, O 2 is able to make the dielectric more likely to be negatively charged .…”

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confidence: 99%

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Effect of Redox Atmosphere on Contact Electrification of Polymers

et al. 2020

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The Triboelectric Nanogenerator has demonstrated broad applications in energy, environmental, and electronic fields, as well as huge potential in the mechanism study of contact electrification, since 2012. Herein, we employed a Triboelectric Nanogenerator working in vertical contactseparation mode to study the electrification performance of the polymer under redox atmosphere. The results show that the electron-withdrawing ability of the polymer is weakened with increasing O 3 concentration. Considering that O 3 is typically one of the strongest oxidants, we further studied the electrification performance under H 2 , CO, and O 2 atmosphere. It is found that the electron-withdrawing ability was predictably weakened under O 2 atmosphere similar to the case of O 3 . On the contrary, the electron-withdrawing ability was enhanced under H 2 and CO atmosphere. Accordingly, a theoretical mechanism involving the highest occupied surface state level is proposed to explain the effect of redox atmosphere on contact electrification. These results clarify that contact electrification can be varied by redox agents. Conversely, it also suggests the possibility to manipulate the redox reactions through the modification of contact electrification.

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Section: Resultscontrasting

confidence: 67%

Section: Resultscontrasting

confidence: 64%

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confidence: 99%

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Effect of Redox Atmosphere on Contact Electrification of Polymers

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“…These factors could considerably stagnate the TECD value. Additionally, there is a chance for the generated TECD to be lost by air breakdown, combining with induced charges and other particles, and finally electron emission . Theoretically, in a capacitive model, we could calculate the TECD (σ) under open-circuit conditions as eq …”

Section: Resultsmentioning

confidence: 99%

Triboelectric Nanogenerator from Used Surgical Face Mask and Waste Mylar Materials Aiding the Circular Economy

Varghese

Chandran

2021

ACS Appl. Mater. Interfaces

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Apart from claiming the lives of more than 3.2 million people, the COVID-19 pandemic is worsening the global plastic pollution every day, mainly with the overflux of single-use polypropylene (PP) face masks. In this scenario, as an innovative solution to mitigate plastic pollution as well as to meet the rising electrical energy demand, we are introducing an all-flexible and facile waste material-based triboelectric nanogenerator (WM-TENG), aiding toward the circular economy. The WM-TENG operating in contact separation mode is fabricated using the PP from a used face mask in combination with recovered Mylar sheets from solid wastes as triboelectric contact layers and a flexible supporting structure. After detailed investigation and trials to study the effect of various disinfection mechanisms of PP materials on the energy output of WM-TENG, UV-C radiation is selected for disinfecting the used masks owing to the retention of electrical energy output. Under a tapping force of 3 N, the WM-TENG having an active area of 6 cm2 delivers an open-circuit voltage of 200 V and a short-circuit current density of 0.29 mA/m2, respectively. The WM-TENG also delivered a maximum power density of 71.16 mW/m2 under 108 Ω load. Additionally, the WM-TENG is demonstrated for powering electronic gadgets such as a calculator, digital thermometer, and LCD clock. This flexible and low-cost nanogenerator without any complex fabrication steps is a sustainable solution for the alarming plastic pollution as well as the rising energy demands.

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“…The TEGs that can work under low accelerating frequency pave the way for its application in a wide range and also in many fields such as energy harvesting − (wind, water wave, mechanical, and biomechanical), sensing applications such as physical sensors, human motion monitoring, , wind vector monitoring, and direction monitoring . Also, TEGs can be used as a chemical sensor by detecting various chemical analytes, − humidity, liquid sensing, and phenols . As a water wave energy harvester, TEGs have been utilized with various upgrades such as TEG devices with high performance and TEGs with electromagnetic generator (TEG-EMG) hybrid devices, − and device structures such as spheroidal buoy shape and oblate spheroidal shape, butterfly-inspired water wave energy harvester, ship-shaped hybrid type, and roll-swing oscillator type are reported.…”

Section: Introductionmentioning

confidence: 99%

Encapsulated Triboelectric–Electromagnetic Hybrid Generator for a Sustainable Blue Energy Harvesting and Self-Powered Oil Spill Detection

Kim

Vivekananthan

Khandelwal

et al. 2020

ACS Appl. Electron. Mater.

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Hybridizing the triboelectric and electromagnetic generator shows excellent potential in harvesting the water wave energy in a wide frequency range from low to high upon water wave motions. The triboelectric component works on low-frequency accelerations, and at the high-frequency accelerations, the electromagnetic components work efficiently. The hybrid generator is composed of a triboelectric and electromagnetic generator, which generates electrical output independently upon the same mechanical motions. The device is composed of a tubular structure with the inner part having a magnet and Kapton as triboelectric layers, and at the outer part, coils were wounded on either side, activating the electromagnetic part. The same magnet movement activates the triboelectric component when it moves over the Kapton, and during its motion inside the coil, activates the electromagnetic part. The tube-shaped hybrid generator produces an electrical output under the triboelectric component of 20 V and 100 nA with an output power of 85 nW. The single electromagnetic generator unit delivers a determined output of 3 V and 11 mA with an output power of 4 mW. The hybrid configuration generates a higher output of 7 V and 20 mA compared to the individual components. The device is then used as an oil spill detector to detect oil spill at sea with the change in conductivity of the seawater with the generated electrical output from the device. This work renders the innovative approach of scavenging blue energy as well as showing an excellent prospect for enabling the self-powered oil spill detection and marine rescue systems.

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Effects of Environmental Atmosphere on the Performance of Contact–Separation Mode TENG

Cited by 25 publications

References 50 publications

Effect of Redox Atmosphere on Contact Electrification of Polymers

Effect of Redox Atmosphere on Contact Electrification of Polymers

Triboelectric Nanogenerator from Used Surgical Face Mask and Waste Mylar Materials Aiding the Circular Economy

Encapsulated Triboelectric–Electromagnetic Hybrid Generator for a Sustainable Blue Energy Harvesting and Self-Powered Oil Spill Detection

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