High‐Efficiency Poly(Vinylidene Fluoride‐Co‐Hexafluoropropylene) Loaded 3D Marigold Flower‐Like Bismuth Tungstate Triboelectric Films for Mechanical Energy Harvesting and Sensing Applications

Abstract

Triboelectric nanogenerators (TENGs) are one of the most trending energy harvesting devices because of their efficient and simple mechanism in harvesting mechanical energy from the environment into electricity. Herein, ferroelectric and dielectric bismuth tungstate (Bi2WO6 (BWO)) with a marigold flower‐like structure is prepared via a hydrothermal method, which is embedded in poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP), forming a PVDF‐HFP/BWO composite polymer film (CPF) to fabricate TENGs. Generally, the ferroelectric materials exhibit a large piezoelectric coefficient, high electrostatic dipole moment, and high dielectric constant. The prepared PVDF‐HFP/BWO CPF reveals a high polar crystalline β‐phase which leads to enhanced piezoelectric and ferroelectric properties of the CPF, thus resulting in the increased electrical performance of the fabricated TENG. The electrical output performance of the proposed TENG is systematically investigated by varying the amount of BWO material embedded in the PVDF‐HFP polymer. The fabricated PVDF‐HFP/2.5 wt% BWO CPF‐based TENG device exhibits the highest electrical output performance. Additionally, the robust test of the TENG device is conducted to investigate the electrical performance for long‐term durability and mechanical stability. Finally, the proposed TENG is operated as a self‐powered sensor, harvesting mechanical energy from daily life human activities, and powering various low‐power portable electronics.

Multistage SrBaTiO3/PDMS Composite Film‐Based Hybrid Nanogenerator for Efficient Floor Energy Harvesting Applications

“…The decrease in the electrical performance is presumably due to the agglomeration of the BST-2 inside the composite film as shown in the FE-SEM images of composite films in Figure S7, Supporting Information. [10] The agglomeration of the MPs leads to the unevenly applied force and resistance to align dipoles in a particular direction within the composite film. [39,40] From the electrical measurement of various HNGs, it is observed that the HNG with 10 wt% BST-2/PDMS composite film produces maximum electrical performance.…”

“…[8] Meanwhile, loading perovskite particles having a very high dielectric constant or ferroelectricity/piezoelectricity into a polymer film could potentially enhance its dielectric constant, thus resulting in improved electrical output. [10,11] Herein, the fabricated device was named a hybrid nanogenerator (HNG) due to the hybridization of piezoelectric and triboelectric effects. Along with the development of an improved triboelectric film to efficiently convert mechanical energy into electricity, the device structure of HNG is also important to maximize its utilization to harvest various mechanical motions into electricity.…”

High Roughness Induced Pearl Necklace‐Like ZIF‐67@PAN Fiber‐Based Triboelectric Nanogenerators for Mechanical Energy Harvesting

“…Consequently, the instantaneous and effective power density can be calculated using the following equation. [21] W eff =…”

“…However, to increase the charge transfer properties of PVDF and to produce high-performance PVDF-based TENG devices, it is important to incorporate dielectric and electroactive fillers. [18][19][20][21][22][23] To enhance the triboelectric behaviors of PVDF and its copolymers, several functional nanocomposite fillers, such as graphene quantum dots, carbon nanotubes, and silver nanowires, have been incorporated. [24] Recently, 2D Ti 3 C 2 T xbased MXene materials have attracted attention in the energy harvesting and storage fields.…”

Design and synthesis of triboelectric polymers for high performance triboelectric nanogenerators

“…10i) embedded in poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF-HFP) film is also prepared, which not only results in high dielectric constant, but also increases the β-phase crystallization of the polymer. 168 The CaCu 3 Ti 4 O 12 (CCTO) particles with a cubic perovskite structure and high permittivity (up to 7500) are introduced into the positive BMF film to enhance internal polarization and output performance (Fig. 10j).…”