Nano-cluster-enhanced high performance perfluoropolymer electrets

Kashiwagi, Kaori; Okano, Kuniko; Tanabe, Noriko; Sera, Y.; Miyajima, Tatsuya; Morizawa, Yoshitomi; Sakane, Yoshihiko; Hamatani, Y.; Nonaka, Fumiko; Asakawa, A.; Suzuki, Yuji

doi:10.1109/ise.2011.6084987

Cited by 2 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5c, the electrostatic harvester withstands a significant decrease in the RMS output power after the first 5 h. However, it can still maintain an RMS output power of 2.5 μW after enduring long-term baking for 34 h. This result shows that there is a good amount of space charge in the sprayed electret that can survive at high temperatures. Similar phenomena have also been observed for the CYTOP layer enhanced by nanoclusters 53 . For the device at high humidity, as shown in Fig.…”

Section: Energy Harvesting Device With a Spray-coated Electret And Mesupporting

confidence: 81%

Spray-coated electret materials with enhanced stability in a harsh environment for an MEMS energy harvesting device

Luo

Zhang

et al. 2021

Microsyst Nanoeng

View full text Add to dashboard Cite

The charge stability of electret materials can directly affect the performance of electret-based devices such as electrostatic energy harvesters. In this paper, a spray-coating method is developed to deposit an electret layer with enhanced charge stability. The long-term stability of a spray-coated electret is investigated for 500 days and shows more stable performance than a spin-coated layer. A second-order linear model that includes both the surface charge and space charge is proposed to analyze the charge decay process of electrets in harsh environments at a high temperature (120 °C) and high humidity (99% RH); this model provides better accuracy than the traditional deep-trap model. To further verify the stability of the spray-coated electret, an electrostatic energy harvester is designed and fabricated with MEMS (micro-electromechanical systems) technology. The electret material can work as both the bonding interface and electret layer during fabrication. A maximum output power of 11.72 μW is harvested from a vibrating source at an acceleration of 28.5 m/s2. When the energy harvester with the spray-coated electret is exposed to a harsh environment (100 °C and 98% RH), an adequate amount of power can still be harvested even after 34 h and 48 h, respectively.

show abstract

Section: Energy Harvesting Device With a Spray-coated Electret And Mesupporting

confidence: 81%