Abstract

Recently, micro power generation using electret-based electrostatic induction attracts much attention due to its large power output at low frequency range. Since theoretical power output is proportional to the square of the surface charge density of electret, development of high-performance electret is required. Boland et al. employed Teflon reg AF (Du Pont) as their electret film. We previously found that perfluorinated polymer CYTOPTM CTL-M (Asahi Glass Co., Ltd.) shows high surface charge density of 1.3 mC/m2 (at the thickness of 16 mum), which is 3 times larger than that of Teflon AF. This paper presents a new high-performance polymer electret with higher surface charge density, stability, and high thermal resistibility of electric charges.

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