Triboelectric speed bump as a self-powered automobile warning and velocity sensor

Heo, Deokjae; Chung, Jihoon; Kim, Banseok; Yong, Hyungseok; Shin, Gunsub; Cho, Jung-Woo; Kim, Dongseob; Lee, Sang‐Min

doi:10.1016/j.nanoen.2020.104719

Cited by 65 publications

(32 citation statements)

References 26 publications

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“…Both electrodes were electrically connected by resistor representing load resistance. AC voltage was measured on the load resistance and corresponding DC value was established by root mean square (RMS), as is done by many authors [37][38][39][40]. Output RMS voltage of the triboelectric generator was measured for different values of load.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Polyvinylidene Fluoride (PVDF) Electrospun Fibers Doped by Carbon Flakes

et al. 2020

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Polyvinylidene fluoride (PVDF) is a modern polymer material used in a wide variety of ways. Thanks to its excellent resistance to chemical or thermal degradation and low reactivity, it finds use in biology, chemistry, and electronics as well. By enriching the polymer with an easily accessible and cheap variant of graphite, it is possible to affect the ratio of crystalline phases. A correlation between the ratios of crystalline phases and different properties, like dielectric constant as well as piezo- and triboelectric properties, has been found, but the relationship between them is highly complex. These changes have been observed by a number of methods from structural, chemical and electrical points of view. Results of these methods have been documented to create a basis for further research and experimentation on the usability of this combined material in more complex structures and devices.

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Section: Resultsmentioning

confidence: 99%

Characterization of Polyvinylidene Fluoride (PVDF) Electrospun Fibers Doped by Carbon Flakes

et al. 2020

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“…[3] TENGs with an increased output have been used as auxiliary power sources for portable electronics [4] and various self-powered sensors for chemical [5] and motion detection. [6] Despite these advantages, recent studies have highlighted certain limitations of the high surface potential, which may lead to an air breakdown [7] and low current output generation. [8] Notably, a typical TENG structure consists of an electrode and dielectric layer that exhibit relative motion, [9] and the corresponding phenomena may result in the air breakdown and low current output.…”

mentioning

confidence: 99%

Nonpolar Liquid Lubricant Submerged Triboelectric Nanogenerator for Current Amplification via Direct Electron Flow

Chung

Song

et al. 2021

Advanced Energy Materials

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higher surface charge, [2] and increasing the surface area by implementing micro-/ nanostructured surfaces. [3] TENGs with an increased output have been used as auxiliary power sources for portable electronics [4] and various self-powered sensors for chemical [5] and motion detection. [6] Despite these advantages, recent studies have highlighted certain limitations of the high surface potential, which may lead to an air breakdown [7] and low current output generation. [8] Notably, a typical TENG structure consists of an electrode and dielectric layer that exhibit relative motion, [9] and the corresponding phenomena may result in the air breakdown and low current output. [8] To alleviate the electrical problems, certain researchers recommended strategies such as changing the ambient environment, [10] utilizing a liquid to suppress air breakdown, [11] and inducing micro plasma to ensure a high electric current. [12] Furthermore, several known mechanical limitations of TENGs have been attempted to be addressed through mechanical design [13] or the use of a lubricant [14] to avoid the exposure of the polymer dielectric to any excessive input force, which may critically reduce the TENG lifespan. [15] Despite these efforts to address the mechanical or electrical problems, the generation mechanism and Triboelectric nanogenerators (TENGs) can convert a mechanical energy input to an electric energy output through Maxwell's displacement current. By increasing the electrical output and overcoming the mechanical limitations of TENGs, such devices can be used as an auxiliary power source for portable electronics. Nevertheless, the generation mechanism and structure must be optimized to compensate for the electrical and mechanical limitations of TENGs. This paper reports on a nonpolar liquid lubricant submerged TENG (LLS-TENG), which can overcome the existing electrical and mechanical limitations of the TENG. When a nonpolar liquid lubricant is filled in the LLS-TENG, the air breakdown can be effectively blocked owing to the large Debye length of such lubricants. In addition, the rolling friction and lubrication present in the LLS-TENG can significantly reduce the friction wear of the device. Consequently, the LLS-TENG can charge a commercial capacitor and battery by generating a high voltage and current output of up to 200 V and 170 mA, respectively.

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“…Recently, with the advantages of low cost, easy fabrication, and a wide variety of material choices, triboelectric nanogenerators have been utilized in self‐powered devices, energy harvesting systems, and environmental control systems. [ 9–19 ] Normally, the open‐circuit voltage of an electret‐based triboelectric nanogenerator (E‐TENG) can reach ≈200 V but with a very low current of ≈1 µA. [ 20 ] Thus, an approach to improve the output current of E‐TENGs is critical for future applications.…”

Section: Figurementioning

confidence: 99%

A Wind‐Driven Poly(tetrafluoroethylene) Electret and Polylactide Polymer‐Based Hybrid Nanogenerator for Self‐Powered Temperature Detection System

Zhang

Gong

et al. 2020

Advanced Sustainable Systems

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With growing interest in artificial intelligence and the Internet of Things, self‐powered electronics have gained considerable attention. In this investigation, a wind‐driven hybrid nanogenerator system comprising a poly(l‐lactic acid)‐based piezoelectric nanogenerator and a poly(tetrafluoroethylene) electret‐based triboelectric nanogenerator (E‐TENG) is proposed. At a wind speed of 5.1 m s−1, the open‐circuit voltage (Voc) and short‐circuit current (Isc) of the hybrid nanogenerator (NG) reach ≈140 V and 16 µA, respectively. The maximum output power of the hybrid NG reaches ≈0.49 mW with a matching resistance of 8 MΩ, which is 22% larger than the output power of the E‐TENG. The hybrid NG can charge a lithium battery to 2.9 V in 8 h. Furthermore, the charged battery can be employed to drive an IR remote controlled light‐emitting diode lamp and turn the lamp on and off. In addition, it can be combined with a Bluetooth low energy (BLE) temperature sensor to form a self‐powered BLE temperature detection system. The hybrid NG shows great promise in self‐powered environmental monitoring and detection applications.

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Triboelectric speed bump as a self-powered automobile warning and velocity sensor

Cited by 65 publications

References 26 publications

Characterization of Polyvinylidene Fluoride (PVDF) Electrospun Fibers Doped by Carbon Flakes

Characterization of Polyvinylidene Fluoride (PVDF) Electrospun Fibers Doped by Carbon Flakes

Nonpolar Liquid Lubricant Submerged Triboelectric Nanogenerator for Current Amplification via Direct Electron Flow

A Wind‐Driven Poly(tetrafluoroethylene) Electret and Polylactide Polymer‐Based Hybrid Nanogenerator for Self‐Powered Temperature Detection System

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