Electret-based microfluidic power generator for harvesting vibrational energy by using ionic liquids

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• 作者：Weijie Kong ; Lin Cheng ; Xiaodong He ; Zhihua Xu…
• 关键词：Microfluidic ; Power generator ; Energy harvesting ; Electret ; Vibration
• 刊名：Microfluidics and Nanofluidics
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：18
• 期：5-6
• 页码：1299-1307
• 全文大小：2,263 KB
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• 作者单位：Weijie Kong (1)
  Lin Cheng (1)
  Xiaodong He (1)
  Zhihua Xu (1)
  Xiangyuan Ma (2)
  Yude He (2)
  Liujin Lu (2)
  Xiaoping Zhang (1)
  Youquan Deng (2)
  
  1. School of Information Science and Engineering, Lanzhou University, Lanzhou, 730000, China
  2. Centre for Green Chemistry and Catalysis, Lanzhou Institute of Chemical Physics, CAS, Lanzhou, 730000, China
  
• 刊物类别：Engineering
• 刊物主题：Engineering Fluid Dynamics
  Medical Microbiology
  Polymer Sciences
  Nanotechnology
  Mechanics, Fluids and Thermodynamics
  Engineering Thermodynamics and Transport Phenomena
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1613-4990

文摘

Harvesting ambient vibrational energy for powering autonomous and mobile electronic systems is a challenge, which can be potentially met by microfluidics-based power generator. In this work, we propose a new microfluidic power generator (MPG) based on electret. By periodically compressing the microscopic conductive liquid bridge between two electrodes, the electrical power is generated. A simple electrical circuit model is developed for theoretical analysis. The experimental and theoretical results imply that the variation magnitude of the top contact area and the surface charge density of the electret are the two critical factors in power generation, and the output power improves drastically with the two factors. Furthermore, this MPG uses the ionic liquid as the liquid media, which can continuously work well in the air under normal conditions and in the wide operating temperature range. By far, the prototype with just single ionic liquid bridge of 15?μL volume and the surface charge density of 0.167?mC/m2 can generate the maximum effective power of 0.221?μW and the energy per cycle of 7.48?nJ.