Mechanical and electrical characterization of PVDF-ZnO hybrid structure for application to nanogenerator

Abstract

The hybridization of different nanomaterials has been studied widely for the versatile use of nanogenerators in a range of environments. This paper reports an analysis of the power enhancements in a hybrid piezoelectric structure comprised of zinc oxide (ZnO) nanowires and poly(vinylidene fluoride) (PVDF) polymer. The mechanical properties were examined by atomic force microscopy and simulated by the finite element method. The electrical properties of the hybrid nanogenerators were observed by electrostatic force microscopy and direct I-V measurements. Based on this analysis, the ZnO nanowires delivered internal strain to the PVDF in the hybrid structure, which enhanced the electrical power output of a hybrid nanogenerator. These results may open up new ways to optimize a hybrid piezoelectric structure in terms of its design and the spatial arrangement of each nanostructure.

Control of oxygen vacancies in ZnO nanorods by annealing and their influence on ZnO/PEDOT:PSS diode behaviour

“…as well as improving the properties of devices that already use such structures. 3,9,[40][41][42] In this work, high aspect ratio ZnO nanorods were synthesized in a single step using an aqueous solution method by altering the synthesis time and precursor concentration. A p-n junction was assembled by spray-coating a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) film on the top of the ZnO nanorods.…”

Significant triboelectric enhancement using interfacial piezoelectric ZnO nanosheet layer

“…This electric potential difference moves charges through the conductive back metal electrodes of the TENG and external circuit, thus powering the connected device or system [1,5]. Current efforts for enhancing the conversion efficiency and output performance of TEG [6,7] mainly focus on the enhancement in the triboelectric charge density () via the following methods: (i) judicious selection of suitable triboelectric materials with large difference in their triboelectric polarities; (ii) enhancement of the effective contact area of the triboelectric materials by surface functionalisation [7], silicon template based micro/nanopatterning [1,9], introduction of inorganic/organic nanostructures [4] and finally, (iii) enhancement of charge density via charge injection/polarisation by addition of piezoelectric additives and production of hybrid piezoelectric/triboelectric structures [9]. The simulation analysis carried out for enhanced power output observed for the combined piezoelectric, triboelectric systems has revealed the following coupling types:…”

A High Efficacy Self‐Charging MoSe2 Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

“…The NaNbO 3 cubes are used to prepare a piezo poly mer-separator for the SCSPC device by impregnating NaNbO 3 cubes in a PVDF matrix followed by electrospinning. [34,35] Figure S4A-E (Supporting Information) represents the piezoresponse of the NaNbO 3 /PVDF nanofibrous separator measured under various applied compressive forces from 10 to 30 N. It clearly evidences that the output piezovoltage is highly dependant on the applied compressive force and directly proportional to it. The FE-SEM micrograph shown in Figure 1C,D shows the formation of the NaNbO 3 /PVDF nanofibrous mat with a diameter of 500 nm.…”