A novel centrifugal electrospinning design for preparing of high alignment fl-phase PVDF nanofibers for high-performance piezoelectric nanogenerators

The effects of polyvinylidene fluoride (PVDF) wt. % and electric fields on the production of PVDF fibers using a novel centrifugal electrospinning design were investigated. High -quality, bead -free fibers with diameter of (0.55 +/- 0.04) mu m were successfully produced. Fibers with exceptionally high fl -phase content of 96.1 % and piezoelectric coefficient, d 33 of (-157 +/- 5) pC N -1 were obtained using PVDF amount and electric field of 14.0 wt % and 400 V cm -1 , respectively. Under 3.0 N repetitive vertical forces, the fabricated piezoelectric nanogenerator (PENG) exhibited impressive open -circuit voltage, short-circuit current and power density of (32.6 +/- 0.7) V, (3.26 +/- 0.07) mu A and (15.4 +/- 0.6) mu W cm - 2 , respectively. The production of high and well aligned fl -phase in the fibers indicated by good d 33 values are the likely reasons for the excellent performance of the PENG. Ultimately, potential of the fabricated PENG as a self -power supply for low -energy electronic devices was demonstrated.