Long-Term Stability of Ferroelectret Energy Harvesters

Kayaharman, Muhammed; Das, Taylan; Seviora, Gregory; Saritas, Resul; Abdel‐Rahman, Eihab; Yavuz, Mustafa

doi:10.3390/ma13010042

Cited by 3 publications

(4 citation statements)

References 22 publications

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“…[74,75] Luo et al prepared an 80-layer ferroelectret energy harvesting insole, which could harvest about 100 μJ energy per footstep of a person 80 kg in weight [76,77]. Later, by using newly developed, thermally stable ferroelectrets with large longitudinal and/or transverse piezoelectricity, power outputs of up to more than 100 μW were achieved [78][79][80][81][82][83][84][85][86][87][88][89]. Zhang et al prepared radiation-crosslinked PP (IXPP) ferroelectrets with improved piezoelectric sensitivity and better thermal stability as compared with normal cellular PP ferroelectrets [78].…”

Section: Applicationsmentioning

confidence: 99%

“…prepared an 80‐layer ferroelectret energy harvesting insole, which could harvest about 100 μJ energy per footstep of a person 80 kg in weight [76, 77]. Later, by using newly developed, thermally stable ferroelectrets with large longitudinal and/or transverse piezoelectricity, power outputs of up to more than 100 μW were achieved [78–89]. Zhang et al.…”

Section: Applicationsmentioning

confidence: 99%

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Ferroelectrets: Recent developments

Qiu

Bian

Liu

et al. 2022

IET Nanodielectrics

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Ferroelectrets (also called piezoelectrets) are relatively young members in the family of piezo‐, pyro‐ and ferroelectric materials. They exhibit ferroic behaviour phenomenologically undistinguishable from that of traditional ferroelectrics, although the materials per se are essentially non‐polar space‐charge electrets with artificial macroscopic dipoles (i.e. internally charged cavities). Since ferroelectrets not only represent a scientific curiosity but also have great application potential, they have attracted tremendous attention from science and industry. The research and development of ferroelectrets has witnessed significant progress in the past few years. New ferroelectrets with large transverse piezoelectric activity, biodegradable ferroelectrets as well as 3‐D printed ferroelectrets are reported. Charging methods of high efficiency are proposed based on better understanding of the physico‐chemical processes during charging. New insights into the piezoelectricity of ferroelectrets are provided. The development of ferroelectret‐based piezoelectric‐magnetic multimodal transducer films opens up new avenues for the research of ferroelectrets. Particularly, more and more novel applications of ferroelectrets in flexible pressure sensors, health monitoring, energy harvesting, air‐coupled ultrasonic non‐destructive testing etc. are reported. Here, these exciting recent advancements in the field of ferroelectret research are reviewed and discussed.

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Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Ferroelectrets: Recent developments

Qiu

Bian

Liu

et al. 2022

IET Nanodielectrics

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“…Energy harvesters, as emerging energy supply devices, leverage various mechanisms, such as piezoelectric [ 1 , 2 , 3 ], electromagnetic [ 4 , 5 ], triboelectric [ 6 , 7 ], and photovoltaic [ 8 , 9 ] effects, to convert mechanical energy, wind energy, solar energy, and other forms of ambient energy into electrical energy for external output. Among them, piezoelectric energy harvesters [ 10 , 11 , 12 ] have been employed in widespread applications due to their simple structure [ 13 , 14 ], long lifespan [ 15 , 16 ], and high adaptability [ 17 , 18 , 19 ] to environmental conditions. These devices operate by utilizing the mechanical energy obtained from the external environment to induce deformation in the internal piezoelectric material.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Novel Ultra-Low-Frequency Rotational Energy Harvester Based on a Double-Frequency Up-Conversion Mechanism

Li,

Xia,

Yang

et al. 2023

Micromachines

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Due to their lack of pollution and long replacement cycles, piezoelectric energy harvesters have gained increasing attention as emerging power generation devices. However, achieving effective energy harvesting in ultra-low-frequency (<1 Hz) rotational environments remains a challenge. Therefore, a novel rotational energy harvester (REH) with a double-frequency up-conversion mechanism was proposed in this study. It consisted of a hollow cylindrical shell with multiple piezoelectric beams and a ring-shaped slider with multiple paddles. During operation, the relative rotation between the slider and the shell induced the paddles on the slider to strike the piezoelectric beams inside the shell, thereby causing the piezoelectric beams to undergo self-excited oscillation and converting mechanical energy into electrical energy through the piezoelectric effect. Additionally, by adjusting the number of paddles and piezoelectric beams, the frequency of the piezoelectric beam struck by the paddles within one rotation cycle could be increased, further enhancing the output performance of the REH. To validate the output performance of the proposed REH, a prototype was fabricated, and the relationship between the device’s output performance and parameters such as the number of paddles, system rotation speed, and device installation eccentricity was studied. The results showed that the designed REH achieved a single piezoelectric beam output power of up to 2.268 mW, while the REH with three piezoelectric beams reached an output power of 5.392 mW, with a high power density of 4.02 μW/(cm3 Hz) under a rotational excitation of 0.42 Hz, demonstrating excellent energy-harvesting characteristics.

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“…Such a construction allows to obtain the effective Young's modulus on the level of 10 5 10 6-Pa, with preservation of charge-stability [24], and finally, receive the piezoelectric coefficient d 33 exceeding 1000 pC/N [25]. Relatively high elasticity of ferroelectrets and their high d 33 coefficient cause that ferroelectret materials are frequently applied in energy harvesters solutions [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Bubble Electret-Elastomer Piezoelectric Transducer

Kacprzyk

Mirkowska

2020

Energies

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Ferroelectret-based piezoelectric transducers are, nowadays, commonly used in energy harvesting applications due to their high piezoelectric activity. Unfortunately, the processing properties of such materials are limited, and new solutions are sought. This paper presents a new solution of a piezoelectric transducer containing electret bubbles immersed in an elastomer matrix. Application of a gas-filled dielectric bubble as the fundamental cell of the piezo-active structure is discussed. A simplified model of the structure, containing electret thin-wall bubbles and elastomer dielectric filling, was applied to determine the value of the piezoelectric coefficient, d33. An exemplary structure containing piezo-active bubbles, made of an electret material, immersed in an elastomer filling is presented. The influence of the mechanical and electrical properties of particular components on the structure piezoelectric properties are experimentally examined and confirmed. The quasi-static method was used to measure the piezoelectric coefficient, d33. The separation of requirements related to the mechanical and electrical properties of the transducer is discussed.

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Long-Term Stability of Ferroelectret Energy Harvesters

Cited by 3 publications

References 22 publications

Ferroelectrets: Recent developments

Ferroelectrets: Recent developments

Investigation of a Novel Ultra-Low-Frequency Rotational Energy Harvester Based on a Double-Frequency Up-Conversion Mechanism

Bubble Electret-Elastomer Piezoelectric Transducer

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