摩擦电效应
纳米发生器
材料科学
机械能
电容
能量收集
电压
静电感应
电势能
风浪
光电子学
功率(物理)
电气工程
声学
电极
物理
工程类
地质学
复合材料
海洋学
量子力学
作者
Steven L. Zhang,Minyi Xu,Chunli Zhang,Yi‐Cheng Wang,Haiyang Zou,Xu He,Zhengjun Wang,Zhong Lin Wang
出处
期刊:Nano Energy
[Elsevier]
日期:2018-06-01
卷期号:48: 421-429
被引量:216
标识
DOI:10.1016/j.nanoen.2018.03.062
摘要
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.
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