Piezoelectric Power Harvesting Devices: An Overview

Batra, Ashok K.; Alomari, Almuatasim; Chilvery, Ashwith; Bandyopadhyay, Alak; Grover, Karan

doi:10.1166/asem.2016.1819

Cited by 24 publications

(7 citation statements)

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“…Figure S6 (Supporting Information) shows the temperature, temperature variation rate, and pyroelectric current. The pyroelectric coefficient of P(VDF‐TrFE) can be calculated by

p = \frac{(I_{p} normal/ A)}{(normald T normal/d t)}

where p is the pyroelectric coefficient, A is the effective electrode area, (d T /d t ) is the temperature variation rate, and I p is the pyroelectric current. The effective electrode area of the pyroelectric NG is 1 × 1 cm 2 .…”

Section: Resultsmentioning

confidence: 99%

High‐Performance Piezoelectric, Pyroelectric, and Triboelectric Nanogenerators Based on P(VDF‐TrFE) with Controlled Crystallinity and Dipole Alignment

Kim

Lee

Ryu

et al. 2017

Adv Funct Materials

175

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Poly(vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)), as a ferroelectric polymer, offers great promise for energy harvesting for flexible and wearable applications. Here, this paper shows that the choice of solvent used to dissolve the polymer significantly influences its properties in terms of energy harvesting. Indeed, the P(VDF-TrFE) prepared using a high dipole moment solvent has higher piezoelectric and pyroelectric coefficients and triboelectric property. Such improvements are the result of higher crystallinity and better dipole alignment of the polymer prepared using a higher dipole moment solvent. Finite element method simulations confirm that the higher dipole moment results in higher piezoelectric, pyroelectric, and triboelectric potential distributions. Furthermore, P(VDF-TrFE)-based piezoelectric, pyroelectric, and triboelectric nanogenerators (NGs) experimentally validate that the higher dipole moment solvent significantly enhances the power output performance of the NGs; the improvement is about 24% and 82% in output voltage and current, respectively, for piezoelectric NG; about 40% and 35% in output voltage and current, respectively, for pyroelectric NG; and about 65% and 75% in output voltage and current for triboelectric NG. In brief, the approach of using a high dipole moment solvent is very promising for high output P(VDF-TrFE)-based wearable NGs.The ORCID identification number(s) for the author(s) of this article can be found under http://dx.

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“…Figure S6 (Supporting Information) shows the temperature, temperature variation rate, and pyroelectric current. The pyroelectric coefficient of P(VDF‐TrFE) can be calculated by

p = \frac{(I_{p} normal/ A)}{(normald T normal/d t)}

Section: Resultsmentioning

confidence: 99%

High‐Performance Piezoelectric, Pyroelectric, and Triboelectric Nanogenerators Based on P(VDF‐TrFE) with Controlled Crystallinity and Dipole Alignment

Kim

Lee

Ryu

et al. 2017

Adv Funct Materials

175

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“…Owing to their proven biocompatibility as well as strong and stable piezoelectric effect, such materials can generate electrical activity when mechanically deformed. [10][11][12] In this context, PVDF scaffolds have been studied for various medical applications including engineering of vascular grafts, fractionation of human plasma, and bone and nerve regeneration. [13][14][15] According to previous studies of peripheral nerve regeneration, the micro-electric pulses of PVDF films positively influenced directional axon growth.…”

Section: Introductionmentioning

confidence: 99%

Force induced piezoelectric effect of polyvinylidene fluoride and polyvinylidene fluoride-co-trifluoroethylene nanofibrous scaffolds

et al. 2018

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Polyvinylidene fluoride and its co-polymer with trifluoroethylene are promising biomaterials for supporting nerve regeneration processes because of their proven biocompatibility and piezoelectric properties that could stimulate cell ingrowth due to electrical activity upon mechanical deformation. This study reports the piezoelectric effect of electrospun polyvinylidene fluoride scaffolds in response to mechanical loading. An impact test machine was used to evaluate the generation of electrical voltage upon application of an impact load. Scaffolds were produced via electrospinning from polyvinylidene fluoride and polyvinylidene fluoride-co-trifluoroethylene with concentrations of 10-20 wt% dissolved in N,N-dimethylformamide (DMF) and acetone (6:4). The structural and thermal properties of scaffolds were analyzed using Fourier Transform Infrared Spectroscopy and Differential Scanning Calorimetry, respectively. The piezoelectric response of the scaffolds was induced using a custom-made manual impact press machine. Impact forces between 0.4 and 14 N were applied. Fourier Transform Infrared Spectroscopy and Differential Scanning Calorimetry results demonstrated the piezoelectric effect of the electrospun polyvinylidene fluoride and polyvinylidene fluoride-co-trifluoroethylene scaffolds. All the scaffolds exhibited a piezoelectric polar beta-phase formation. Their thermal enthalpies were higher than the value of the initial materials and exhibited a better tendency of crystallization. The electrospun scaffolds exhibited piezoelectric responses in form of voltage by applying impact load. Polyvinylidene fluoride-co-trifluoroethylene scaffolds showed higher values in the range of 6-30 V as compared to pure polyvinylidene fluoride. Here, the mechanically induced electrical impulses measured were between 2.5 and 8 V. Increasing the impact forces did not increase the piezoelectric effect. The results demonstrate the possibility of producing electrospun polyvinylidene fluoride and polyvinylidene fluoride-co-trifluoroethylene scaffolds as nerve guidance with piezoelectric response. Further experiments must be carried out to analyze the piezoelectricity at dynamic conditions.

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“…Designing an electronic circuit for low‐power generation is a research topic itself. [ 65 , 66 , 67 , 68 ] For subsequent publications, we will evaluate different circuit designs and further examine energy harvesting efficiency using the bilayer with optimized material properties. PVDF‐based thermal energy harvesting has previously been explored, but the ability to convert low‐grade thermal energy into electricity by employing the piezoelectric (primary) and pyroelectric (secondary) effect sets this system apart from existing systems.…”

Section: Resultsmentioning

confidence: 99%

Directional, Low‐Energy Driven Thermal Actuating Bilayer Enabled by Coordinated Submolecular Switching

Leveille

Shen

et al. 2021

Advanced Science

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The authors reveal a thermal actuating bilayer that undergoes reversible deformation in response to low-energy thermal stimuli, for example, a few degrees of temperature increase. It is made of an aligned carbon nanotube (CNT) sheet covalently connected to a polymer layer in which dibenzocycloocta-1,5-diene (DBCOD) actuating units are oriented parallel to CNTs. Upon exposure to low-energy thermal stimulation, coordinated submolecular-level conformational changes of DBCODs result in macroscopic thermal contraction. This unique thermal contraction offers distinct advantages. It's inherently fast, repeatable, low-energy driven, and medium independent. The covalent interface and reversible nature of the conformational change bestow this bilayer with excellent repeatability, up to at least 70 000 cycles. Unlike conventional CNT bilayer systems, this system can achieve high precision actuation readily and can be scaled down to nanoscale. A new platform made of poly(vinylidene fluoride) (PVDF) in tandem with the bilayer can harvest low-grade thermal energy and convert it into electricity. The platform produces 86 times greater energy than PVDF alone upon exposure to 6 °C thermal fluctuations above room temperature. This platform provides a pathway to low-grade thermal energy harvesting. It also enables low-energy driven thermal artificial robotics, ultrasensitive thermal sensors, and remote controlled near infrared (NIR) driven actuators.

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Piezoelectric Power Harvesting Devices: An Overview

Cited by 24 publications

References 0 publications

High‐Performance Piezoelectric, Pyroelectric, and Triboelectric Nanogenerators Based on P(VDF‐TrFE) with Controlled Crystallinity and Dipole Alignment

High‐Performance Piezoelectric, Pyroelectric, and Triboelectric Nanogenerators Based on P(VDF‐TrFE) with Controlled Crystallinity and Dipole Alignment

Force induced piezoelectric effect of polyvinylidene fluoride and polyvinylidene fluoride-co-trifluoroethylene nanofibrous scaffolds

Directional, Low‐Energy Driven Thermal Actuating Bilayer Enabled by Coordinated Submolecular Switching

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