Frequency dependent energy storage and dielectric performance of Ba–Zr Co-doped BiFeO3 loaded PVDF based mechanical energy harvesters: effect of corona poling

The low dielectric constant of the nonpolar polymer poly(1-butene) (PB-1) limits its application as a diaphragm element in energy storage capacitors. In this work, Ba(Zr0.2Ti0.8)O3-coated multiwalled carbon nanotubes (BZT@MWCNTs) were first prepared by using the sol–gel hydrothermal method and then modified with polydopamine (PDA) via noncovalent polymerization. Finally, PB-1 matrix composite films filled with PDA-modified BZT@MWCNTs nanoparticles were fabricated through a solution-casting method. Results indicated that the PDA-modified BZT@MWCNTs had good dispersion and binding force in the PB-1 matrix. These characteristics improved the dielectric and energy storage performances of the films. Specifically, the PDA-modified 10 vol% BZT@ 0.5 vol% MWCNTs/PB-1 composite film exhibited the best dielectric performance. At 1 kHz, the dielectric constant of this film was 25.43, which was 12.7 times that of pure PB-1 films. Moreover, its dielectric loss was 0.0077. Furthermore, under the weak electric field of 210 MV·m−1, the highest energy density of the PDA-modified 10 vol% BZT@ 0.5 vol% MWCNTs/PB-1 composite film was 4.57 J·cm−3, which was over 3.5 times that of PB-1 film (≈1.3 J·cm−3 at 388 MV·m−1).

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Flexible nano-GFO/PVDF piezoelectric-polymer nano-composite films for mechanical energy harvesting

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/338/1/012026 ◽

2018 ◽

Vol 338 ◽

pp. 012026 ◽

Cited By ~ 3

Author(s):

Monali Mishra ◽

Amritendu Roy ◽

Sukalyan Dash ◽

Somdutta Mukherjee

Keyword(s):

Energy Harvesting ◽

Mechanical Energy ◽

Composite Films ◽

Nano Composite ◽

Piezoelectric Polymer

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Thermo-mechanical energy harvesting and storage analysis in 0.6BZT-0.4BCT ceramics

The European Physical Journal Applied Physics ◽

10.1051/epjap/2021200308 ◽

2021 ◽

Author(s):

Satyanarayan Patel ◽

Manish Kumar ◽

Yashwant Kashyap

Keyword(s):

Energy Storage ◽

Energy Harvesting ◽

Thermal Energy ◽

Mechanical Energy ◽

Energy Storage Density ◽

Storage Density ◽

Thermal Energy Harvesting ◽

Polarization Electric Field ◽

And Storage ◽

Olsen Cycle

Present work shows waste energy (thermal/mechanical) harvesting and storage capacity in bulk lead-free ferroelectric 0.6Ba(Zr0.2Ti0.8)O3-0.4(Ba0.7Ca0.3)TiO3 (0.6BZT-0.4BCT) ceramics. The thermal energy harvesting is obtained by employing the Olsen cycle under different stress biasing, whereas mechanical energy harvesting calculated using the thermo-mechanical cycle at various temperature biasing. To estimate the energy harvesting polarization-electric field loops were measured as a function of stress and temperatures. The maximum thermal energy harvesting is obtained equal to 158 kJ/m3 when the Olsen cycle operated as 25-81 °C (at contact stress of 5 MPa) and 0.25-2 kV/mm. On the other hand, maximum mechanical energy harvesting is calculated as 158 kJ/m3 when the cycle operated as 5-160 MPa (at a constant temperature of 25 °C) and 0.25-2 kV/mm. It is found that the stress and temperature biasing are not beneficial for thermal and mechanical energy harvesting. Further, a hybrid cycle, where both stress and temperature are varied, is also studied to obtain enhanced energy harvesting. The improved energy conversion potential is found as 221 kJ/m3 when the cycle operated as 25-81 °C, 5-160 MPa and 0.25-2 kV/mm. The energy storage density varies from 43 to 66 kJ/m3 (increase in temperature: 25-81 °C) and 43 to 80 kJ/m3 (increase in stress: 5 to 160 MPa). Also, the pre-stress can be easily implemented on the materials, which improve energy storage density almost 100% by domain pining and ferroelastic switching. The results show that stress confinement can be an effective way to enhance energy storage.

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Effects of the Particle Size of BaTiO3 Fillers on Fabrication and Dielectric Properties of BaTiO3/Polymer/Al Films for Capacitor Energy-Storage Application

Materials ◽

10.3390/ma12030439 ◽

2019 ◽

Vol 12 (3) ◽

pp. 439 ◽

Cited By ~ 8

Author(s):

Lulu Gu ◽

Tao Li ◽

Yongjun Xu ◽

Chenghua Sun ◽

Zhenyu Yang ◽

...

Keyword(s):

Energy Storage ◽

Dielectric Properties ◽

Coupling Agent ◽

Silane Coupling Agent ◽

Large Scale ◽

Composite Films ◽

Major Influence ◽

Energy Storage Application ◽

Dielectric Performance ◽

Silane Coupling

BaTiO3/polymer/Al (BPA) composite films for energy storage were fabricated by way of a roll coating and thermal curing process. The coating slurry consisted of silicon-containing heat-resistant resin (CYN-01) and BaTiO3 particles with various particle sizes obtained from commercial BaTiO3 powders processed at different durations of wet sand grinding in the presence of silane coupling agent (KH550), which not only improves the dielectric performance of the BPA films but also facilitates its production in a large scale. The major influence factors, such as the ratio between BaTiO3 and resin and the size of BaTiO3 particles, were investigated and their related mechanisms were discussed. The results show that modifying BaTiO3 particles (D90 = 0.83 μm) with the silane coupling agent of KH550 enhances the dielectric properties of the BPA films. The typical BPA films obtained exhibit a high dielectric constant of 32, a high break strength of 20.8 V/μm and a low dielectric loss of 0.014. The present work provides a simple and convenient way to prepare high-quality ceramic/polymer composite films for energy-storage application in a large scale.

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A flexible, planar energy harvesting device for scavenging road side waste mechanical energy via the synergistic piezoelectric response of K0.5Na0.5NbO3-BaTiO3/PVDF composite films

Nanoscale ◽

10.1039/c7nr04115b ◽

2017 ◽

Vol 9 (39) ◽

pp. 15122-15130 ◽

Cited By ~ 27

Author(s):

Venkateswaran Vivekananthan ◽

Nagamalleswara Rao Alluri ◽

Yuvasree Purusothaman ◽

Arunkumar Chandrasekhar ◽

Sang-Jae Kim

Keyword(s):

Energy Harvesting ◽

Mechanical Energy ◽

Composite Films ◽

Piezoelectric Response ◽

Probe Sonication

A probe-sonication derived planar, sustainable composite-piezoelectric nanogenerator was developed to harness the waste mechanical energy.

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Microfluidic Synthesis of Polymer Ionic Liquid Gel Beads for Energy Harvesting Applications

Volume 7: Fluids Engineering ◽

10.1115/imece2016-67018 ◽

2016 ◽

Author(s):

Kaushik A. Kudtarkar ◽

Thomas W. Smith ◽

Patricia Iglesias ◽

Michael J. Schertzer

Keyword(s):

Ionic Liquid ◽

Energy Harvesting ◽

Uv Light ◽

Mechanical Energy ◽

Electrostatic Energy ◽

Chemical Compositions ◽

Carrier Fluid ◽

Energy Harvesters ◽

Gel Beads ◽

Energy Harvesting Devices

In the operation of many common devices and processes, more than 60% of consumed energy is wasted in many common processes. These loses come in many forms including heat, friction, and vibration. Energy harvesters are devices that can recapture some of this waste energy and convert it into electrical energy. This work will focus on electrostatic energy harvesting devices that recapture vibrational energy. Electrostatic energy harvesters recapture mechanical energy when a conductive mass translates or deforms in an electric field. Polymer ionic liquid gel beads may serve as a useful replacement for fluid droplets in electrostatic energy harvesters. This work uses a recently developed method for reliable synthesis of polymer gel beads. These beads are synthesized using a micro-reactor, which generates monomeric droplets in a silicon oil carrier fluid. The monomer solution also contains a photoinitiator and cross linker, which enables the monomer to polymerize when exposed to UV light. The present work demonstrates a method to rapidly synthesize uniform beads with a variety of chemical compositions. These chemical compositions can be used to tune the electromechanical properties of the beads to improve performance in applications such as energy harvesting devices.

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The State-of-the-Art Brief Review on Piezoelectric Energy Harvesting from Flow-Induced Vibration

Shock and Vibration ◽

10.1155/2021/8861821 ◽

2021 ◽

Vol 2021 ◽

pp. 1-19

Author(s):

Hongjun Zhu ◽

Tao Tang ◽

Huohai Yang ◽

Junlei Wang ◽

Jinze Song ◽

...

Keyword(s):

Energy Harvesting ◽

Bluff Body ◽

Mechanical Energy ◽

Wake Flow ◽

Structural Vibration ◽

Small Scale ◽

Flow Induced Vibration ◽

Energy Harvesters ◽

Piezoelectric Energy ◽

Self Powered

Flow-induced vibration (FIV) is concerned in a broad range of engineering applications due to its resultant fatigue damage to structures. Nevertheless, such fluid-structure coupling process continuously extracts the kinetic energy from ambient fluid flow, presenting the conversion potential from the mechanical energy to electricity. As the air and water flows are widely encountered in nature, piezoelectric energy harvesters show the advantages in small-scale utilization and self-powered instruments. This paper briefly reviewed the way of energy collection by piezoelectric energy harvesters and the various measures proposed in the literature, which enhance the structural vibration response and hence improve the energy harvesting efficiency. Methods such as irregularity and alteration of cross-section of bluff body, utilization of wake flow and interference, modification and rearrangement of cantilever beams, and introduction of magnetic force are discussed. Finally, some open questions and suggestions are proposed for the future investigation of such renewable energy harvesting mode.

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Acoustic Energy Harvesting Through Multilayer Piezoelectric Harvester Model

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.c8669.019320 ◽

2020 ◽

Vol 9 (3) ◽

pp. 1848-1856

Keyword(s):

Energy Harvesting ◽

Low Power ◽

Mechanical Energy ◽

Scaling Analysis ◽

Ambient Vibrations ◽

Specific Element ◽

Power Sources ◽

Energy Harvesters ◽

Piezoelectric Energy ◽

Effective Transfer

Low-power requirements of contemporary sensing technology attract research on alternate power sources that can replace batteries. Energy harvesters’ function as power sources for sensors and other low-power devices by transducing the ambient energy into usable electrical form. Energy harvesters absorbing the ambient vibrations that have potential to deliver uninterrupted power to sensing nodes installed in remote and vibration rich environments motivate the research in vibrational energy harvesting. Piezoelectric bimorphs have been demonstrating a pre-eminence in converting the mechanical energy in ambient vibrations into electrical energy. Improving the performance of these harvesters is pivotal, as the energy in ambient vibrations is innately low. In this paper, we propose a mechanism namely MultilayerPEHM (Piezoelectric Energy Harvester Model) which helps in converting the waste or unused energy into the useful energy. Multilayer-PEHM contains the various layer, which is placed one over the other, each layer is placed with specific element according to their properties and size, the size of the layer plays an important part for achieving efficiency. Furthermore, this paper presents an audit of the energy available in a vibrating source and design for effective transfer of the energy to harvesters, secondly, design of vibration energy harvesters with a focus to enhance their performance, and lastly, identification of key performance metrics influencing conversion efficiencies and scaling analysis for these acoustic harvesters. Typical vibration levels in stationary installations such as surfaces of blowers and ducts, and in mobile platforms such as light and heavy transport vehicles, are determined by measuring the acceleration signal. The frequency content in the signal is determined from the Fast Fourier Transform.

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