Abstract
We propose a ferroelectric dipole electret (FDE) consisting of a polarized ferroelectric for output power enhancement in electrostatic vibration energy harvesters. Lead zirconate titanate (PZT) ceramics were employed to develop the FDEs. For comparison, a conventional electret was also prepared by implanting charges into a 10-μm thick CYTOP polymer by using point-to-grid corona discharging method. Output power was evaluated from a vertical-type capacitive energy harvester at acceleration 4.9 m/s^2, frequency 20 Hz, and initial air gap 0.36 mm. The maximum output power of FDE harvester is 8.6 μW, a 1.7-fold increase over a CYTOP polymer electret harvester. The FDE demonstrated the higher potential compared to the conventional polymer electret.
