Piezoelectric Nanogenerators and Its Applications

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A:Physics".

Deadline for manuscript submissions: closed (20 July 2021) | Viewed by 2674

Special Issue Editor


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Guest Editor
Laboratory of Organic Electronics (LOE), Department of Science and Technology (ITN), Linköping University, Bredgatan 33, 602 21 Norrköping, Sweden
Interests: piezoelectricity; pyroelectricity; self powered sensors; energy harvesting devices

Special Issue Information

Dear Colleagues,

Using portable electronic devices in everyday human life is increasing day by day. To power these devices, we need to recharge the battery every time. There is lot of abundant energy around us which can be used for this purpose by converting mechanical energy into electrical energy. Piezoelectric nanogenerators made of piezoelectric materials are particularly suitable for this, as they participate in this energy conversion process and help us to get enough power. In this process, electronic devices can be self-powered. Utilizing this advantage, piezoelectric nanogenerators can be used in different applications. They can be used in self-powered mechanical energy harvesting, human health monitoring, human motion sensors, wearable sensors, gas sensors, pacemakers, pH sensors, electronic skin, and much more. There is lot of ongoing research by many research groups all over the world in this field which opens many new research paths if piezoelectric materials can be used to make hybrid composites with other material with different functionality. These composites are especially useful for multifunctional applications. This issue will focus on piezoelectric nanogenerators and their applications in many directions to contribute to and broaden this research field.

Dr. Ayesha Sultana
Guest Editor

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Keywords

  • Piezoelectric Materials
  • Nanogenerators
  • Self-Powered Sensors
  • Electronic Skin
  • Multifunctional Applications

Published Papers (1 paper)

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Research

21 pages, 5815 KiB  
Article
On the Efficiency of a Piezoelectric Energy Harvester under Combined Aeroelastic and Base Excitation
by Antiopi-Malvina Stamatellou and Anestis I. Kalfas
Micromachines 2021, 12(8), 962; https://doi.org/10.3390/mi12080962 - 14 Aug 2021
Cited by 6 | Viewed by 2188
Abstract
A flutter-type, nonlinear piezoelectric energy harvester was tested in various combinations of aerodynamic and harmonic base excitation to study its power output and efficiency. The commercial polyvinylidene fluoride film transducer LDT1-028K was used in 33 excitation mode. The aerodynamic excitation was created by [...] Read more.
A flutter-type, nonlinear piezoelectric energy harvester was tested in various combinations of aerodynamic and harmonic base excitation to study its power output and efficiency. The commercial polyvinylidene fluoride film transducer LDT1-028K was used in 33 excitation mode. The aerodynamic excitation was created by a centrifugal fan and the base excitation by a cone speaker. The excitations were produced by varying independently the mean airflow velocity and the frequency of base vibration. A capacitive load was used to store the harvested energy. A line laser was employed along with long exposure photography and high-speed video, for the visualization of the piezo film’s mode shapes and the measurement of maximum tip deflection. The harvested power was mapped along with the maximum tip deflection of the piezo-film, and a process of optimally combining the two excitation sources for maximum power harvesting is demonstrated. The energy conversion efficiency is defined by means of electrical power output divided by the elastic strain energy rate of change during oscillations. The efficiency was mapped and correlated with resonance conditions and results from other studies. It was observed that the conversion efficiency is related to the phase difference between excitation and response and tends to decrease as the excitation frequency rises. Full article
(This article belongs to the Special Issue Piezoelectric Nanogenerators and Its Applications)
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