Fabrication And Research Of The Bctz Piezoelectric Nanogenerator Based On Electrospinning

In recent years,the excessive consumption of fossil energy in worldwide has resulted in serious energy crisis and severe environmental problems.It is urgent to implement the strategy of sustainable development and vigorously develop the renewable clean new energy.The piezoelectric nanogenerator can effectively transform the weak mechanical energy in the environment into electric energy,which could lead to a new energy technology revolution on the micro-nano scale.This article made a qualitative comparison of three flexible nanogenerators based on lead-free perovskite BCTZ piezoelectric ceramic material prepared by electrospinning method,analyzed and explained its differences from the principle of the piezoelectric properties,to find pollution-free and environmental-friendly high-performance piezoelectric material.The smooth surface of the BCTZ nanofibers prepared by electrostatic spinning has become very rough after calcined,and the diameter is evenly distributed at about 100 nm-250 nm,and crystallized well-no other crystal phase.The open circuit voltage and short circuit current generated by the piezoelectric nanogenerator based on the disordered BCTZ nanobars are 0.6 V and 10 nA respectively,under the effect of the finger regular tapping – release.The disordered BCTZ nanobars are aligned along the field line in PDMS,and the open circuit voltage and short circuit current of the nanogenerator increased to 2.2 V and 90 nA respectively after the dielectrophoresis orientation.The BCTZ nanofibers collected using parallel iron wire electrode have good uniform orientation,which the nanogenerator based on generated an output voltage and short circuit current of 3 V and 110 nA under the effect of regular bending and recovery.The above experimental data demonstates that the dielectrophoresis and the parallel electrodes can improve the orientation of the one-dimensional nanofibers effectively and also improve the piezoelectric properties greatly.It is also proved that lead-free BCTZ piezoelectric ceramic materials have great potential and development space in the field of biomechanical energy acquisition.