An effective energy harvesting method from a natural water motion active transducer

Kwon, Soon Hyung; Park, Jun‐Woo; Kim, Won Keun; Yang, Young‐Min; Lee, Eungkyu; Han, Chul Jong; Park, Si Yun; Lee, Jeongno; Kim, Youn Sang

doi:10.1039/c4ee00588k

Cited by 148 publications

(103 citation statements)

References 21 publications

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“…For the collection of water wave energy, a polyurethane (PU) coated copper rod is used to roll back and forth and contact with the PTFE film covered interdigitative electrodes. The working principle is based on solid-solid contact electrification, which is different from that of water-TENG in the previous studies [18][19][20][21]. In order to enhance the electric output of TENG, the surfaces of the PU and PTFE films are fabricated as porous structures and nanowire arrays, which provide the advantages of large contact area to generate more triboelectric charges on the surfaces and efficient separation after contact.…”

Section: Introductionmentioning

confidence: 98%

“…A new active transducer without using any external bias voltage has been sucessfully demonstrated to collect the hydropower from various water motions [21], which is also based on water-solid contact electrification. These results about water-TENG are important because hydroelectric power is unlimited and could be good alternative to solar energy [22,23].…”

Section: Introductionmentioning

confidence: 99%

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A multi-layered interdigitative-electrodes-based triboelectric nanogenerator for harvesting hydropower

Lin

Cheng

et al. 2015

Nano Energy

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Hydropower is the most important and wildly-used renewable energy source in the environment. In this paper, we demonstrate a multi-layered triboelectric nanogenerator (TENG) to effectively harvest the water wave energy. For a single-layered TENG, interdigitive electrodes are incorporated in order to generate multiple electric outputs under water wave or water drop impact. For the collection of water wave energy, a polyurethane (PU) coated copper rod is used to roll back and forth and contact with the polytetrafluoroethylene (PTFE) film covered interdigitative electrodes. The surfaces of the PU and PTFE films are fabricated as porous structures and nanowire arrays, which provide an advantages of large contact area and efficient separation. Under one wave impact, the single-layered TENG composed of nine pairs of interdigitative electrodes can provide nine pulses of electric outputs (each pulsed output voltage is 52 V and output current density is 13.8 mA m À 2 ). The instantaneous output power density of a five-layered TENG is 1.1 W m À 2 . In addition, the PTFE film covered interdigitative electrodes has been successfully used to harvest water drop energy, whcih can also generate 9 pulses of electric outputs upon one water drop falling. All these results show the developed TENG has a potential to harvest the hydropower of ocean wave and raindrop in the near future.Please cite this article as: Z.-H. Lin, et al., A multi-layered interdigitative-electrodes-based triboelectric nanogenerator for harvesting hydropower, Nano Energy (2015), http://dx.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A multi-layered interdigitative-electrodes-based triboelectric nanogenerator for harvesting hydropower

Lin

Cheng

et al. 2015

Nano Energy

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“…Current mechanical energy harvesting technologies are mainly relying on mechanisms including electromagnetic effect, piezoelectric effect and electrostatic induction [1,[7][8][9]. However, major challenges are still to be addressed, including low output power, structure complexity and difficulty in miniaturization [10][11][12][13][14][15][16]. In recent years, triboelectric nanogenerators (TENG) that had a novel mechanism were developed.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional rotary triboelectric nanogenerator as a portable and wearable power source for electronics

et al. 2015

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“…We compared the output energy of this bubble motion active transducer (BMAT) with the similar system using a descending water droplet called water motion active transducer (WMAT) [5]. Energy conversion efficiency of BMAT is remarkably higher compared to WMAT.…”

Section: Extended Abstractmentioning

confidence: 99%

“…Adsorption and desorption of the ions take place when a bubble rises beneath the hydrophobic surface due to formation of three phase contact line. As a result, EDL capacitors asymmetrically charge and discharge producing voltage deference between two electrodes.We compared the output energy of this bubble motion active transducer (BMAT) with the similar system using a descending water droplet called water motion active transducer (WMAT) [5]. Energy conversion efficiency of BMAT is remarkably higher compared to WMAT.…”

mentioning

confidence: 99%

Electrical Energy form Rising Air Bubbles

Wijewardhana¹,

Shahzad²,

Jayaweera³

et al. 2018

International Conference of Energy Harvesting, Storage, and Transfer

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Extended AbstractTechnologies to harvest electrical energy from waste micro mechanical energy sources have gained considerable attention due to self-powered technology. Different energy sources and energy conversion methods are essential not only for large scale but also for micro/nano scale for self-powered sensors, wearable devices and wireless networks. A few methods have been developed in last decades for conversion of ambient energy to electrical energy such as piezoelectric, photovoltaics and triboelectric methods [1][2][3]. Moreover, contact electrification of liquid-solid interface has become a promising energy harvesting method due to its simple fabrication steps, durability and capability to operate without external bias energy.In this study, we demonstrate a rising air bubble converts its energy to electrical energy while rising beneath a hydrophobic strip shaped electrodes. The two electrode system under water can be represented as two serially connected electrical double layer (EDL) capacitors [4]. Adsorption and desorption of the ions take place when a bubble rises beneath the hydrophobic surface due to formation of three phase contact line. As a result, EDL capacitors asymmetrically charge and discharge producing voltage deference between two electrodes.We compared the output energy of this bubble motion active transducer (BMAT) with the similar system using a descending water droplet called water motion active transducer (WMAT) [5]. Energy conversion efficiency of BMAT is remarkably higher compared to WMAT. WMAT converts about seven time larger energy than water droplet due to the differences in contact area, moving speed, deformation of the bubble and multiple peak outputs from a single bubble [6].Surface charge density on the hydrophobic surface is a critical factor for energy conversion. In this experiment we increased the surface charge density by exposing the surface to argon plasma. Enhancement of surface charge density takes place due to braking bonds and formation of free radicals on the surface. This is confirmed by measuring the water contact angle and electrostatic potential on the hydrophobic surface. The contact angle decreases from the initial value of 119.7° to 108.2° and the surface potential from -2.4 V to -4.3 V. After the plasma treatment, BMAT converted 70 nJ from a single air bubble, which is about 18 times higher than the fresh surface.Finally, we demonstrated the multi-electrodes based BMAT for effective harvesting of energy from rising air bubbles. Multiple current outputs produced by a single air bubble results in higher energy conversion efficiencies. The output energy strongly depends on the way of end connection of the multi-electrodes system. Interdigital electrodes (IDEs) based BMAT and individual rectified multi-electrodes (IRMEs) based BMAT are remarkably different in terms of their energy output. Even though both the systems produce multiple current outputs, energy converted by IDEs based BMAT decreases with the increasing the number of electrodes due to the effec...

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An effective energy harvesting method from a natural water motion active transducer

Cited by 148 publications

References 21 publications

A multi-layered interdigitative-electrodes-based triboelectric nanogenerator for harvesting hydropower

A multi-layered interdigitative-electrodes-based triboelectric nanogenerator for harvesting hydropower

Two-dimensional rotary triboelectric nanogenerator as a portable and wearable power source for electronics

Electrical Energy form Rising Air Bubbles

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