Bernhard Gross and electret research: His contributions, our collaboration, and what followed The Bernhard Gross Memorial Lecture at the 12&amp;gt;sup&amp;lt;th&amp;gt;/sup&amp;lt;International Symposium on Electrets

Sessler, G. M.

doi:10.1109/ise.2005.1612304

Cited by 1 publication

(2 citation statements)

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“…Due to its high Curie temperature (>200 • C), upper energy traps can be activated via heating. This allows charges to be implanted using low energy methods, such as corona triode, as opposed to high energy methods [21]. Moreover, Teflon FEP can maintain more than 90% of its charge over 2-3 years [61,63].…”

Section: Electretmentioning

confidence: 99%

“…Electrostatic conversion can be mainly categorized as (1) electret-free and (2) electretbased. Electrets are considered as 'electrical magnet,' and present permanent electrical polarization obtained by charging dielectric materials such as Teflon (FEP, PTFE), Parylene, SiN, and SiO 2 [20,21]. The invention of electret-based microphone technology by West and Sessler in the 1960s has dramatically increased the widespread use of electrets [21,22].…”

Section: Introductionmentioning

confidence: 99%

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Design and analysis of a vibration energy harvester using push-pull electrostatic conversion

Erturun

Eisape

West

2020

Smart Mater. Struct.

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Methods of electrostatic conversion are available for harvesting energy where there are ambient vibrations. However, most of the previous work in the literature has addressed applications with high frequencies. In this study, we are not only implementing an electret-based energy harvester for low-frequency applications but also evaluating the effect of parameters, including vibration rates, accelerations, electret surface potential, e.g. on the efficiency of electrostatic energy harvesting (EH). A prototype system, with the size of 4 × 28 cm 3 , was built and constructed to accomplish experimental analysis, and the corona triode process was used to prepare electrets by charging Teflon FEP films. In the electret surface potential range of 300-1800 V, vibration frequency range of 2-45 Hz, and acceleration range of 0.1-1.0 g, the effect of parameters on the EH efficiency was experimentally tested. To predict and maximize the performance of the system, a mathematical response surface model (RSM), validated experimentally < 9.5% error. The maximum peak-peak voltage output of 318 V was predicted using this model for the electret surface potential of −1800 V, and vibration frequency of 16 Hz. Moreover, harvested energy was ∼ 900 µJ (∼0.8 µJ per mechanical cycle) in a minute though low frequencies (<20 Hz), which can be easily enhanced to more than 1 mJ with system optimization. We suggest our device can be used in numerous low-frequency applications, and our predictive model can also be used to optimize the efficiency of other electrostatic energy harvesters based on electrets.

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Section: Electretmentioning

confidence: 99%