Rationally designed sea snake structure based triboelectric nanogenerators for effectively and efficiently harvesting ocean wave energy with minimized water screening effect
By Steven L. Zhang, Minyi Xu, Chunli Zhang, Yi-Cheng Wang, Haiyang Zou, Xu He, Zhengjun Wang, Zhong Lin Wang. Nano Energy, 2018
241 citations recorded by the source corpus.
Abstract Ocean waves are one of the most power dense energy sources in the environment. Triboelectric nanogenerators (TENGs) have been demonstrated to effectively harvest mechanical energy carried by low frequency, random/irregular actuation, such as from ocean waves. In this work, a novel design of triboelectric nanogenerator based on the Pelamis snake energy harvester is presented. The sea snake based TENG, with its lightweight structure, was able to harvest energy effectively at low amplitude ocean wave by utilizing charged polytetrafluroethylene balls that would roll due to the wave's curvature. With the integration of springs to connect different segments, the segments are able to bend easily, allowing the enclosed balls to move faster, producing higher output power. The design of an air gap structure allows each segments of the sea snake based TENG to minimize electrostatic induction from ions in sea water, and solve the effect of dielectric shielding from the water on the device performance, as the water, if it is close to the TENG's electrodes, has a detrimental effect causing an increase of the TENG's internal capacitance, which would result in a low voltage with the same amount of charge being transformed. Thus, this illustrates the importance of the air gap structure to minimize low voltage due to high internal capacitance. This further shows the sea snake based triboelectric nanogenerator could be used in actual ocean conditions, such as in high salinity water environment. The added tampered spring to replace the air gap was able to allow the balls on the TENG to move more quickly, as it increased the rotational angle, and the TENG has a maximum power density of 3 W/m3 under actuation. Due to the minimization of dielectric shielding of device performance, the sea snake TENG exhibits a high voltage in simulated water wave conditions.
Subfields: Biomedical Engineering, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/0767bad12b85d214ccc8f7873f0f7324ff4a3cb5
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Citations in the corpus
- A fully-packaged ship-shaped hybrid nanogenerator for blue energy harvesting toward seawater self-desalination and self-powered positioning (2019, background): “This unique structure design alleviates frictional resistance, reducing the energy loss from friction and thus increasing conversion efficiency [15,16].”
- Study of thin film blue energy harvester based on triboelectric nanogenerator and seashore IoT applications (2019, background): “report a extra airgap structure applied in solid-solid contact triboelectric nanogenerator device, which utilizes rolling polytetrafluroethylene balls and is based on freestanding triboelectric-layer mode [67].”
- Promoting smart cities into the 5G era with multi-field Internet of Things (IoT) applications powered with advanced mechanical energy harvesters (2021, background): “Besides mentioned spherical or ball-shell structure, other designs like box [269,270], duck-shaped [271], torus structured [272], oblate spheroidal [273], sea snake structure [274], have been developed according to different energy harvesting technologies applied.”
- Progress in TENG technology—A journey from energy harvesting to nanoenergy and nanosystem (2020, background): “The encapsulated devices minimize the adverse impacts from humidity environment but introduce the complexity of fabrication and maintenance.(193-198) The devices based on liquid-solid contact TENG are normally thin-film typed devices which can be attached on well-designed structure, but their perfor”
- Active resonance triboelectric nanogenerator for harvesting omnidirectional water-wave energy (2021, background): “Moreover, the output performance of TENG is always weaken because of the unavoidable water screening effect.(30) Therefore, it is important to develop a kind of TENG for harvesting the omnidirectional water-wave energy with the maximized efficiency by the resonance effect(27) and eliminating the wat”
- Origami-inspired electret-based triboelectric generator for biomechanical and ocean wave energy harvesting (2020, methodology): “ocean waves have the unique dynamic characteristics of irregular and random vibrations with mixed amplitudes and frequencies [31-36].”
- Recent progress in blue energy harvesting for powering distributed sensors in ocean (2021, methodology): “(j) Structural scheme of the soft-contact model spherical TENG (SS-TENG) with a flexible rolling sphere.”