A Single-Droplet Electricity Generator Achieves an Ultrahigh Output Over 100 V Without Pre-Charging,Advanced Materials

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A Single-Droplet Electricity Generator Achieves an Ultrahigh Output Over 100 V Without Pre-Charging
Advanced Materials ( IF 27.4 ) Pub Date : 2021-10-15 , DOI: 10.1002/adma.202105761
Qi Zhang _{1,

2} , Yahui Li _{1,

2} , Han Cai _{1,

2} , Mingfang Yao ₃ , Haodong Zhang _{1,

2} , Linqi Guo _{1,

2} , Zhenjie Lv _{1,

2} , Mengqiu Li _{1,

2} , Xichi Lu _{1,

2} , Chao Ren _{1,

2} , Penglei Zhang _{1,

2} , Yanxin Zhang _{1,

2} , Xian Shi _{1,

2} , Guifu Ding ₁ , Jinyuan Yao ₁ , Zhuoqing Yang ₁ , Zhong Lin Wang _{4,

5,

6}

Affiliation

The working principle of the triboelectric nanogenerator (TENG), contact electrification and electrostatic induction, has been used to harvest raindrop energy in recent years. However, the existing research is mainly concentrated on solid–liquid electrification, and adopts traditional electrostatic induction (TEI) for output. As a result, the efficiency of droplet electricity generators (DEGs) is severely constrained. Therefore, previous studies deem that the DEG output is limited by interfacial effects. This study reveals that this view is inappropriate and, in reality, the output strategy is the key bottleneck restricting the DEG performance. Here, a switch effect based on an electric-double-layer capacitor (EDLC) is introduced, and an equivalent circuit model is established to understand its working mechanism. Without pre-charging, a single droplet can generate high voltage over 100 V and the output is directly improved by two-orders of magnitude compared with TEI, which is precisely utilizing the interfacial effect. This work provides insightful perspective and lays solid foundation for DEG applications in large scale.

中文翻译：

无需预充电即可实现100V以上超高输出的单液滴发电机

近年来，摩擦纳米发电机（TENG）的工作原理、接触带电和静电感应已被用于收集雨滴能量。然而，现有的研究主要集中在固液带电，并采用传统的静电感应（TEI）进行输出。结果，液滴发电机（DEG）的效率受到严重限制。因此，以前的研究认为 DEG 输出受到界面效应的限制。这项研究表明，这种观点是不恰当的，实际上，输出策略是限制 DEG 性能的关键瓶颈。在此，介绍了一种基于双电层电容器（EDLC）的开关效应，并建立了等效电路模型以了解其工作机理。无需预充电，单个液滴可以产生100V以上的高压，输出比TEI直接提高两个数量级，正是利用了界面效应。这项工作为 DEG 的大规模应用提供了深刻的见解并奠定了坚实的基础。

更新日期：2021-12-22

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