Vibration-based energy harvesting with stacked piezoelectrets

Vibration-based energy harvesters with multi-layer piezoelectrets (ferroelectrets) are presented. Using a simple setup with nine layers and a seismic mass of 8 g, it is possible to generate a power up to 1.3 µW at 140 Hz with an input acceleration of 1g. With better coupling between seismic mass and...

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Bibliographic Details
Published in:Applied physics letters 2014-04, Vol.104 (17)
Main Authors: Pondrom, P., Hillenbrand, J., Sessler, G. M., Bös, J., Melz, T.
Format: Article
Language:English
Subjects:
Applied physics
Damping
Earthquake dampers
ELECTRETS
ENERGY CONVERSION
Energy harvesting
Harvesters
LAYERS
MATERIALS SCIENCE
MECHANICAL VIBRATIONS
Multilayers
PIEZOELECTRICITY
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Summary:Vibration-based energy harvesters with multi-layer piezoelectrets (ferroelectrets) are presented. Using a simple setup with nine layers and a seismic mass of 8 g, it is possible to generate a power up to 1.3 µW at 140 Hz with an input acceleration of 1g. With better coupling between seismic mass and piezoelectret, and thus reduced damping, the power output of a single-layer system is increased to 5 µW at 700 Hz. Simulations indicate that for such improved setups with 10-layer stacks, utilizing seismic masses of 80 g, power levels of 0.1 to 1 mW can be expected below 100 Hz.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4874305