Abstract
This study aimed to develop a novel hybrid piezoelectric structure based on poly(vinylidene difluoride) nanofibers (PVDF NFs) and zinc oxide nanorods (ZnO NRs) which eliminate the need for post poling treatment in such hybrid structures. Mechanism of electrical performance enhancement of the hybrid structure is also discussed in this paper. To study the effect of hybridization on piezoelectric performance, pristine ZnO NRs and pristine PVDF NF nanogenerators were also fabricated. The piezoelectric performance of these three nanogenerators was evaluated under periodic deformation at low frequency. The output power of the hybrid structure was found to be enhanced compared to pristine ZnO NRs and PVDF NFs nanogenerators. Such simple hybrid devices that do not need to complicated post poling treatment are more efficient than previous hybrid PVDF/ZnO nanogenerators for practical application. This improved piezoelectric nanogenerator is expected to enable various applications in the field of self-powered devices and wearable energy harvesting to harvest mechanical energy from the human activities.
Highlights
We reported the electrical performance and the mechanism of electrical enhancement in a novel hybrid piezoelectric structure based on electrospun PVDF NFs and vertically grown zinc oxide (ZnO) nanorods
The PVDF nano bers were electrospun on those zinc oxide nanorods (ZnO NRs) already grown on PTFE to fabricate a hybrid structure
The morphology and structure of ZnO NRs and PVDF NFs were investigated by SEM, XRD and FTIR
Summary
Owing to the unique properties of ZnO and PVDF, to date many efforts have been made to improve the piezoelectric performance of nanogenerators based on these two improved mechanical properties and piezoelectric response of hybrid structures has been reported. It is required to modify the structure to have a more applicable hybrid piezoelectric device. For achieve this purpose, the electrospinning is a simple technique to obtain polar PVDF NFs directly from solution without need to post treatment.[24] hybridization of PVDF nano bers with ZnO nanorod, which has not been reported yet, may led to a novel hybrid device with modi ed structure
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