Triboelectric Enhancement of Polyvinylidene Fluoride Membrane Using Magnetic Nanoparticle for Water-Based Energy Harvesting

Abstract

Produced by magnetic material dispersed in a viscous environment for the purpose of collecting and converting energy, magnetic rheological compounds greatly strengthen the development of skin-attachable and wearable electrical equipment. Given that magnetic nanomaterial anisotropy has a substantial influence on the interface polarizing of polyvinylidene fluoride (PVDF), it is critical to explore the function of magnetic polymer compounds in the triboelectric layer of triboelectric nanogenerator (TENG) output power. In this study, ferromagnetic cobalt ferrite, CoFe2O4 (CFO), nanoparticles, and PVDF were employed to create a triboelectric composite membrane to improve TENG energy output. The content of β phase in PVDF increased significantly from 51.2% of pure PVDF membrane to 77.7% of 5 wt% CFO nanoparticles in the PVDF matrix, which further increase the dielectric constant and negative charge of the membrane. As a consequence, the energy output of CFO/PVDF-5 TENG increased significantly with a voltage of 17.2 V, a current of 2.27 μA, and a power density of 90.3 mW/m2, which is 2.4 times the performance of pure PVDF TENG. Finally, the proposal for TENG hopes that its extraordinary stability and durability will provide additional views on hydrodynamic power generation in the future.

Enhanced Triboelectric Effects of Self-Poled MoS2-Embedded PVDF Hybrid Nanocomposite Films for Bar-Printed Wearable Triboelectric Nanogenerators

“…As shown in Figure S7a,b, the V OC and I SC values increased by postannealing from ∼45 to 80 V and from 3 to 5.2 μA, respectively. However, a relatively low output performance was obtained as compared to that of the MoS 2 @PVDF hybrid nanocomposite films, where V OC and I SC were highly increased by postannealing from ∼52 to 120 V and from 2.7 to 9.4 μA, respectively, as shown in Figure S7c,d, which was attributed to the agglomeration of MoS 2 flakes on the PVDF surface in the PVDF/MoS 2 /PVDF film. , Furthermore, these results suggest that a phase crystallization of PVDF was not induced in PVDF/MoS 2 /PVDF films. In contrast, the triboelectric output for the postannealed samples was slightly higher, and this was likely due to crystallization of the upper PVDF layer rather than the incorporation of MoS 2 into the PVDF.…”

“…As indicated, the surface charge potential of the preannealed PVDF film became more negative (from −228.727 to −508.176 V) upon the MoS 2 incorporation and subsequent annealing, which was attributed to the higher β-crystal phase content in the postannealed nanocomposite film. Among the five known crystal phases of PVDF, the β-crystal phase with the all - trans (TTTT) planar zigzag conformation exhibits the highest degree of polarization per unit cell, thereby leading to the highest surface charge density among the five phases . As a result, the higher negative surface potential of the postannealed MoS 2 @PVDF film enhanced the potential difference between the electrodes, thereby boosting the triboelectric effects.…”

“…Among the five known crystal phases of PVDF, the β-crystal phase with the all-trans (TTTT) planar zigzag conformation exhibits the highest degree of polarization per unit cell, thereby leading to the highest surface charge density among the five phases. 35 As a result, the higher negative surface potential of the postannealed MoS 2 @PVDF film enhanced the potential difference between the electrodes, thereby boosting the triboelectric effects.…”

Study on the Influence of Nano-OvPOSS on the Compatibility, Molecular Structure, and Properties of SBS Modified Asphalt by Molecular Dynamics Simulation

“…The eight ethylene organic branches of nano-OvPOSS are capable of interacting with the active groups of polymers, which is why nano-OvPOSS is able to improve the compatibility between SBS and asphalt. It is well accepted that the outstanding performance of nanomaterial, such as their large specific surface area and high strain resistance, attributes to their unique small size [ 46 , 47 , 48 ]. It is also accepted that the smaller the size of nanomaterial, the larger their specific surface area will be.…”

Comparative Study of Octavinyl Oligomeric Sesquisiloxane Nanomaterial-Modified Asphalt Using Molecular Dynamics Method

“…It is generally accepted that nanomaterial exhibits a large specific surface area which is closely related to its uniquely small size [ 47 , 48 , 49 ]. For this study, the smaller the size of nano-OvPOSS, the larger the specific surface area, and thus the larger the contact range between asphalt molecules and organic groups on the surface of OvPOSS nanoparticles.…”