Electrospun Polyvinylidene Fluoride–Magnesiochromite Nanofiber-Based Piezoelectric Nanogenerator for Energy Harvesting Applications

Abstract

In this paper, magnesiochromite nanocrystalline powder (MgCr 2 O 4 ) was synthesized through the coprecipitation method using an eggshell membrane as a template to get the best structural and morphological properties. The as-synthesized MgCr 2 O 4 was blended with polyvinylidene fluoride (PVDF) and electrospun. Finally, a robust piezoelectric nanogenerator using the PVDF−MgCr 2 O 4 nanofiber was fabricated. The ferroelectric βcrystalline phase and the piezoelectric characteristics of PVDF were enhanced by the incorporation of MgCr 2 O 4 . The fabricated nanogenerator showed an output voltage of 1.05 V with a power density of 0.51 μW/cm 2 . The practical applicability of the nanogenerator as an energy harvester was evaluated through tapping motions of humans.

Wearable Multi-Functional Sensing Technology for Healthcare Smart Detection

“…Roy et al fabricated a piezoelectric nanogenerator based on CdS/rGO nanocomposites doped electrospun PVDF nanofiber, which has the advantages of being light weight, flexible and biocompatible [74]. Ponnan et al proposed a piezoelectric nanogenerator using an n-PVDF and PVDF−MNC nanofiber system that dramatically enhanced piezoelectric characteristics [75]. The structure of the multiple piezoelectric transducers that can measure blood flow velocity a pulse simultaneously.…”

Facile Fabrication of Highly Sensitive Thermoplastic Polyurethane Sensors with Surface- and Interface-Impregnated 3D Conductive Networks

“…Materials and Methods. Polyester-based TPU-65A with a density of 1.18 g/cm 3 was obtained from Wanhua Chemical Group Co. Ltd., China. Graphene with a surface area of 180−280 m 2 /g and a particle size of <10 μm was supplied by The Sixth Element (Changzhou) Materials Technology Co., Ltd., China.…”

“…The traditional metal sensors are restricted in wearable electronics because of their high rigidity and limited flexibility. Therefore, research attention has been dedicated to developing a conductive polymer composite for flexible sensors in the last few years. , Flexible sensors work in different sensing principles such as piezoresistive, capacitive, piezoelectrics, and triboelectric. Among them, much attention has been paid to developing piezoresistive sensors because of their feasible preparation, low cost, simple process, and easy signal analysis …”

Eu3+-Doped Electrospun Polyvinylidene Fluoride–Hexafluoropropylene/Graphene Oxide Multilayer Composite Nanofiber for the Fabrication of Flexible Pressure Sensors

“… 2 Organic piezoelectric materials represented by polyvinylidene fluoride (PVDF) and its copolymers have good piezoelectric, ferroelectric, and electrostrictive response properties, which have been widely used in sensors, actuators, energy storage applications, waterproof coatings, and other fields. 3 − 7…”

“…Electroactive polymers convert electrical energy into mechanical energy with their intrinsic ability, especially under the stimulus of the applied electric field change size or shape (i.e., bending, contraction, or expansion) . Organic piezoelectric materials represented by polyvinylidene fluoride (PVDF) and its copolymers have good piezoelectric, ferroelectric, and electrostrictive response properties, which have been widely used in sensors, actuators, energy storage applications, waterproof coatings, and other fields. − …”