Flexible PET/EVA-based piezoelectret generator for energy harvesting in harsh environments

摘要

Abstract Stable and repeatable operation is paramount for practical and extensive applications of all energy harvesters. Herein, we develop a new type of flexible piezoelectret generator, which converts mechanical energy into electricity consistently even under harsh environments. Specifically, the generator, with piezoelectric coefficient (d 33) reaching ~ 6300 pC/N, had worked stably for continuous ~ 90000 cycles, and the generator pressed by a human hand produced load peak current and power up to ~ 29.6 μA and ~ 0.444mW, respectively. Moreover, the capability to steadily produce electrical power under extreme moisture and temperature up to 70°C had been achieved for possible applications in wearable devices and flexible electronics. Graphical abstract ? A new type of flexible piezoelectret generator with piezoelectric coefficient (d 33) coefficient reaching ~ 6300 pC/N is fabricated for mechanical energy harvesting.