Design Of Two Types Of Flexible Nanogenerators Based On Dual-phase Water System And Lead Zirconate Titanat

Nanogenerators have attracted extensive attention in recent years as a clean and pollution-free energy collection and conversion device.Nanogenerator power supply for portable and miniaturized intelligent electronic devices is one of its current main development directions.This requires nanogenerators to pay attention to the research and development of the flexibility of the device itself while pursuing energy efficiency to adapt to the effective application of nanogenerators in different environments.In view of the current shortage of alternative materials for flexible electronic devices,two types of flexible nanogenerators were designed and developed based on the aqueous two-phase system(ATPS)and lead zirconate titanate(PZT).In view of the influence of surface roughness of traditional triboelectric materials,which limits the output capability of triboelectric nanogenerators(TENGs)to a certain extent,this paper introduces a new material system--aqueous two-phase system.A flexible nanogenerator with a new working mode--liquid-liquid triboelectric nanogenerator(L-L TENG)was developed and fabricated.This L-L TENG has good output capability,and at the same time,it is proved to be suitable for humid environment,and the two-phase material has good biocompatibility and can be used as a good carrier for drugs.Therefore,this nanogenerator is useful for future design of implantable devices and the design of a new type of bionic fully self-powered system has great potential.Compared with organic piezoelectric materials and composite piezoelectric materials,inorganic materials have higher piezoelectric coefficients,which makes it possible to prepare nanogenerators with high-voltage electrical output performance.However,with the development of flexible electronic devices,it is a challenge to realize pure inorganic piezoelectric materials for flexible piezoelectric nanogenerators(PENGs)without organic carriers.In this paper,the lead zirconate titanate(PZT)precursor nanofiber membranes prepared by electrospinning were calcined at low temperature,and the pure inorganic PZT nanofiber membranes with good flexibility were obtained.A flexible pure inorganic PENG with good output capability was prepared.And we found that the same Maxwell displacement current as PENG generated when the PZT fiber membrane was mechanically vibrated could promote the adsorption of Congo red solution.In addition,the color change after saturated adsorption can quickly judge the actual loading of the fiber membrane.