Direct current contact-mode triboelectric nanogenerators via systematic phase shifting
Direct current contact-mode triboelectric nanogenerators via systematic phase shifting
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DOI：
10.1016/j.nanoen.2020.104887
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发表时间：
2020-09-01
期刊：
影响因子：
17.6
通讯作者：
Silva, S. R. P.
中科院分区：
文献类型：
--
作者：
Dharmasena, R. D. I. G.;Cronin, H. M.;Silva, S. R. P.
摩擦电纳米发电机（TENGs）发电的间歇性和不连续性质可以说是它们最大的缺点，尽管在低功耗电子产品中表现出了希望。本文介绍了一种新的技术来克服这一问题，该技术采用内置的系统多极相移来设计伪直流TENG。与之前基于滑模TENG电极分割构建近直流TENG的尝试不同，该技术引入了一种新方法，该方法依赖于在不同时间间隔对组成TENG单元的计划激励，以获得必要的相移，通过其包含不对称空间排列的结构设计来实现。因此，以前仅限于滑模TENG单元的TENG的直流发电扩展到接触模TENG。该技术允许驱动负载连续平稳运行，并为从机械源中获取能量的新曙光铺平了道路。我们使用距离相关电场（DDEF）平台来设计系统相移技术，并通过基于独立模式TENG （FSTENG）的设计进行了实验验证，为许多原型设备供电。在相对较低的频率下，TENG的输出功率表明峰值系数接近1.1，这是迄今为止报道的具有接触模式基本单元的TENG的最佳值。这项工作为人们期待已久的解决方案提供了一条途径，以克服TENG输出的间歇性和偶发性，从而促进该领域为下一代自主和移动电子产品提供动力。
The intermittency and discontinuous nature of power generation in Triboelectric Nanogenerators (TENGs) are arguably their most significant drawback, despite the promise demonstrated in low-power electronics. Herein, we introduce a novel technology to overcome this issue, in which, built-in systematic phase shifting of multiple poles is used to design a pseudo direct-current TENG. Unlike previous attempts of constructing near direct current TENGs that are based on the segmentation of electrodes of a sliding mode TENG, this technology introduces a new method that depends on planned excitation of constituent TENG units at different time intervals to obtain the necessary phase shifts, achieved by their structural design that contains an asymmetric spatial arrangement. Therefore, the direct current generation for TENG, which was previously limited to the sliding mode TENG units, are expanded to contact-mode TENGs. The technology allows for continuous and smooth operation of the driven loads and paves the way for a new dawn in energy scavenging from mechanical sources. We use the distance-dependent electric field (DDEF) platform to design the systematic phase shifting technology, which is experimentally demonstrated via a free-standing mode TENG (FSTENG) based design, to power a number of prototype devices. The resultant power output of the TENG indicates a crest factor close to 1.1 at relatively low frequencies, the best reported values for TENGs with contact-mode basic units, to date. This work provides a route to the highly awaited solution to overcome the intermittency and sporadic nature of TENG outputs, thus, promoting the field towards powering next generation autonomous and mobile electronics.