scholarly journals Performance Enhancement of Flexible Polymer Triboelectric Generator through Polarization of the Embedded Ferroelectric Polymer Layer

2021 ◽  
Vol 11 (3) ◽  
pp. 1284
Author(s):  
Deahoon Park ◽  
Min Cheol Kim ◽  
Minje Kim ◽  
Pangun Park ◽  
Junghyo Nah
Keyword(s):  
Performance Enhancement ◽  
Vinylidene Fluoride ◽  
Single Layer ◽  
Pdms Layer ◽  
Surface Charges ◽  
Preferred Direction ◽  
Output Performance ◽  
Flexible Polymer ◽  
Poly Vinylidene Fluoride ◽  
Triboelectric Generator

In this work, we report on a flexible triboelectric generator (TEG) with a multilayer polymer structure, consisting of a poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) layer sandwiched by polydimethylsiloxane (PDMS) layers for the performance enhancement of TEGs. We confirmed that the output performance of the TEG is closely dependent on the structure and polarization direction of the PVDF-TrFE layer. In addition, the PDMS layer serves as the electron trapping layer and suppresses the discharging of the surface charges, boosting the output performance. Furthermore, the polarized PVDF-TrFE layer in the preferred direction contributes to increasing the surface potential during the contact–separation motion. The interaction between these two polymer layers synergistically leads to the boosted output performance of TEGs. Specifically, the maximum peak-to-peak output voltage and current density of 420 V and 50 μA/cm2 generated by the proposed architecture, representing approximately a fivefold improvement compared with the TEG with a single layer, even though the same friction layers were used for contact electrification.

High Efficient and Continuous Triboelectric Power Harvesting based on Porous β-phase Poly (vinylidene fluoride) Aerogel

2021 ◽  
Author(s):  
Minmin Wang ◽  
Weiqun Liu ◽  
Xu Shi ◽  
Jinyang Pan ◽  
Bing Zhou ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
High Electron ◽  
Exchange Method ◽  
Power Harvesting ◽  
Β Phase ◽  
Output Performance ◽  
High Electron Affinity ◽  
High Efficient ◽  
Poly Vinylidene Fluoride ◽  
High Output

Non-additive β-phase porous poly (vinylidene fluoride) (PVDF) aerogel with high electron affinity is successfully prepared through simple solvent exchange method. The as-prepared additive-free PVDF aerogel shows high output performance used...

scholarly journals High Electromechanical Deformation Based on Structural Beta-Phase Content and Electrostrictive Properties of Electrospun Poly(vinylidene fluoride- hexafluoropropylene) Nanofibers

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1817 ◽  
Author(s):  
Nikruesong Tohluebaji ◽  
Chatchai Putson ◽  
Nantakan Muensit
Keyword(s):  
Dielectric Properties ◽  
Smart Materials ◽  
Microelectromechanical Systems ◽  
Vinylidene Fluoride ◽  
Interfacial Polarization ◽  
Surface Charges ◽  
Thermal Compression ◽  
Β Phase ◽  
Interfacial Surface ◽  
Poly Vinylidene Fluoride

The poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) polymer based on electrostrictive polymers is essential in smart materials applications such as actuators, transducers, microelectromechanical systems, storage memory devices, energy harvesting, and biomedical sensors. The key factors for increasing the capability of electrostrictive materials are stronger dielectric properties and an increased electroactive β-phase and crystallinity of the material. In this work, the dielectric properties and microstructural β-phase in the P(VDF-HFP) polymer were improved by electrospinning conditions and thermal compression. The P(VDF-HFP) fibers from the single-step electrospinning process had a self-induced orientation and electrical poling which increased both the electroactive β-crystal phase and the spontaneous dipolar orientation simultaneously. Moreover, the P(VDF-HFP) fibers from the combined electrospinning and thermal compression achieved significantly enhanced dielectric properties and microstructural β-phase. Thermal compression clearly induced interfacial polarization by the accumulation of interfacial surface charges among two β-phase regions in the P(VDF-HFP) fibers. The grain boundaries of nanofibers frequently have high interfacial polarization, as they can trap charges migrating in an applied field. This work showed that the combination of electrospinning and thermal compression for electrostrictive P(VDF-HFP) polymers can potentially offer improved electrostriction behavior based on the dielectric permittivity and interfacial surface charge distributions for application in actuator devices, textile sensors, and nanogenerators.

Triboelectric generator composed of bulk poly(vinylidene fluoride) and polyethylene polymers for mechanical energy conversion

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 910-917 ◽  
Author(s):  
Piyush Kanti Sarkar ◽  
Subrata Maji ◽  
Gundam Sandeep Kumar ◽  
Krushna Chandra Sahoo ◽  
Dipankar Mandal ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Output Voltage ◽  
Vinylidene Fluoride ◽  
Mechanical Energy ◽  
Poly Vinylidene Fluoride ◽  
Triboelectric Generator

Triboelectric generator composed of poly(vinylidene fluoride) and polyethylene shows an output voltage of ∼20 V lighting at least 12 LEDs.

Piezoelectric Polymer Transducers

1987 ◽  
Vol 1 (1) ◽  
pp. 45-49 ◽  
Author(s):  
G.T. Davis
Keyword(s):  
Vinylidene Fluoride ◽  
Effective Means ◽  
Protective Layer ◽  
Pressure Transducers ◽  
Flexible Polymer ◽  
Piezoelectric Polymer ◽  
Poly Vinylidene Fluoride ◽  
Sharp Edges ◽  
Repeated Use ◽  
Film Transducer

Poly(vinylidene fluoride) (CH2-CF2)n is a tough, flexible polymer readily available in the form of thin film which can be made piezoelectric by the temporary application of a high electric field. The areas of the film which become piezoelectric can be controlled to be the areas where metal electrodes are evaporated onto the film. The same electrodes and associated leads are subsequently used to detect the electric charge generated by the application of pressure to the active area. Such films may have applications in the measurement of occlusal forces. Many of the problems that might be encountered in an occlusal gauge have been addressed separately in other applications. For example, polymer transducers less than 100 μm thick have been developed and tested for measuring the nip pressure on an intaglio printing press. Piezoelectric polymer gauges have been successfully encased in a protective layer of another polymer to prevent the sharp edges of sand particles from breaking through the piezoelectric film. Transducer films with an array of active areas have been produced with electrical leads from each area so that the source of the signal can be traced. Electrode patterns have usually been established by evaporation of metal through a mask, but silk-screening a conductive ink has also been shown to be an effective means of defining which areas of the film are to be made piezoelectric. Finally, poly(vinylidene fluoride) has been shown to retain 80% of its initial activity after 1000 hours at 100°C, and it is unaffected by moisture. Therefore, if necessary, gauges to be used in dentistry could be subjected to steam sterilization for repeated use. The physical properties of such polymer films and examples of their use in pressure transducers are reviewed with the intent of stimulating interest in development of a system useful for measuring occlusal forces.

scholarly journals Organic, Flexible, Polymer Composites for High-Temperature Piezoelectric Applications

2014 ◽  
Vol 1 (3-4) ◽  
Author(s):  
Cary Baur ◽  
Yuan Zhou ◽  
Justin Sipes ◽  
Shashank Priya ◽  
Walter Voit
Keyword(s):  
High Temperature ◽  
Polymer Composites ◽  
Vinylidene Fluoride ◽  
Piezoelectric Response ◽  
Flexible Polymer ◽  
Piezoelectric Polymers ◽  
Poly Vinylidene Fluoride ◽  
Industrial Use ◽  
Operating Temperatures

AbstractIndustrial use of piezoelectric polymers is currently limited by low piezoelectric response and large performance losses at elevated operating temperatures. Leading polymers such as poly(vinylidene fluoride) and poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) possess piezoelectric d

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