基于压电纳米发电机的柔性传感与能量存储器件

Flexible sensor and energy storage device based on piezoelectric nanogenerator

柔性电子与柔性传感器件未来将广泛应用在物联网、可穿戴、可植入系统中,例如人体健康监控、触觉感知人造感官以及智能机器人电子皮肤等.柔性压电纳米发电机的能量转换特性,使其不仅可以作为供能器件,而且可以作为传感器件提供传感信号,可以解决柔性电子与自驱动技术中存在供能与性能的限制.纳米发电机利用调控界面与表面的极化电场可以获得高性能传感与能量存储,提供自驱动特性,同时具有与目前电子技术相媲美的高性能.本文综述了柔性压电纳米发电机在柔性传感与能量存储领域的最新研究进展.

Low-cost,easy-to-deploy and self-driven flexible electronic devices and flexible sensors will bring new opportunities for developing the internet of things,wearable,and implantable technologies,especially human health monitoring,tactile perception and intelligent robot electronic skin.Therefore,it is necessary to provide high-performance and continuous energy supply modules for flexible electronic devices and flexible sensors.Nanogenerator can achieve high-performance sensing and energy storage characteristics by regulating the polarization electric field at the interface and surface,which is indeed an ideal adaptation choice.In particular,flexible piezoelectric nanogenerator can convert mechanical energy into electrical energy by piezoelectric properties,and can be applied to various deformation conditions such as bending,stretching and compression,which provides a novel solution to the problems of limited energy supply and insufficient performance in flexible electronic and self-driven technology.The piezoelectric output response of piezoelectric nanogenerator can be used not only as an energy signal to self-drive flexible electronic devices,but also as a sensing signal that can be integrated into the self-driven flexible sensors such as gas sensor,pressure sensor and biological sensor.Predictably,self-powered gas sensor with energy harvesting and high-sensitivity sensing,and self-charging power cell with energy harvesting and efficient storage will become hot topics.In this paper,we review the recent developments of flexible piezoelectric nanogenerators in flexible sensors and energy storage devices.