Kinetic motion sensors based on flexible and lead-free hybrid piezoelectric composite energy harvesters with nanowires-embedded electrodes for detecting articular movements

Ham, Seong Su; Lee, Jun Young; Hyeon, Dong Yeol; Kim, Yeon-gyu; Lim, Yeong‐won; Lee, Min Ku; Park, Jin Ju; Hwang, Geon‐Tae; Sangbong, Yi; Jeong, Chang Kyu; Park, Kwi‐Il

doi:10.1016/j.compositesb.2021.108705

Cited by 66 publications

(16 citation statements)

References 57 publications

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“…35 These results are related to the area effectively contributing to each cycle: while in the pressure mode, the whole area is equally contributing to the energy output; under bending deformation, some part of the samples does suffer lower forces and deformations, which, therefore, lead to lower contributions to the energy output. Bending angle (or displacement) and velocity also lead to variations on generated output energy, 36 increasing the output voltage with increasing both deformation speed and angle.…”

Section: Resultsmentioning

confidence: 99%

Transparent Piezoelectric Polymer-Based Materials for Energy Harvesting and Multitouch Detection Devices

Rodrigues-Marinho

Pereira

Correia

et al. 2021

ACS Appl. Electron. Mater.

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Energy harvesting devices allowing to recover wasted energy from the environment are increasingly being developed. Mechanical energy is one of the most interesting sources for energy harvesting, and piezoelectric materials present excellent overall properties for the scavenging of that energy. Piezoelectric polymers, and, in particular, poly(vinylidene fluoride), show appropriate mechanical properties for large amplitude movements, higher piezoelectric coefficients, and transparency and can be easily integrated into devices. A transparent piezoelectric energy harvesting device has been developed with screen-printed transparent (72%) and conductive (42 Ω/sq) electrodes on PVDF sheets with a d 33 = −23 pC/N, generating about P ∼ 12 μW and P ∼ 8 μW under pressing and bending modes, corresponding to an energy per cycle of E∼ 37 nJ and E ∼ 55 nJ, respectively. The piezoelectric energy harvesting characteristics of the materials have been also theoretically evaluated, and the applicability of the materials for touch detection has been demonstrated.

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Section: Resultsmentioning

confidence: 99%

Transparent Piezoelectric Polymer-Based Materials for Energy Harvesting and Multitouch Detection Devices

Rodrigues-Marinho

Pereira

Correia

et al. 2021

ACS Appl. Electron. Mater.

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“…22 Among these crystalline phases in PVDF, the non-polarized α-phase without electroactive properties is the most stable and common, while the polar β-phase with the aligned polarization direction endows PVDF with the desired piezoelectric properties. 25–27 Accordingly, numerous methods including electric poling, 23,24 mechanical stretching 25,26 and melting crystallization with high pressure or high cooling rate have been proposed to maximize the content of polar β-phase in PVDF. 27–29 However, harsh conditions such as high temperature, high pressure, or high electric field are generally required for the fabrication of PVDF with a high β-phase content, which exhibits severe limitations in large-scale devices and practical applications.…”

Section: Introductionmentioning

confidence: 99%

High-performance piezoelectric nanogenerators featuring embedded organic nanodroplets for self-powered sensors

Lim

2022

J. Mater. Chem. A

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“…Piezoelectric ceramics, magnetostrictive alloys, and their composites have all been studied with the aim of improving the performance of the materials and devices applied to energy harvesting. [ 4–6 ] In particular, piezoelectric ceramics and composites have a wide range of applications, [ 7–11 ] although research concerning magnetostrictive materials has also been conducted. [ 12–16 ] Energy harvesting devices that use the magnetostrictive effect are currently being investigated; however, the majority of such studies are focused on Fe–Dy–Tb (Terfenol‐D) and Fe–Ga (Galfenol) alloys.…”

Section: Introductionmentioning

confidence: 99%

Effects of Heat Treatment and Cr Content on the Microstructures, Magnetostriction, and Energy Harvesting Performance of Cr‐Doped Fe–Co Alloys

et al. 2021

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The novel coronavirus (COVID-19) has had a great impact worldwide, and various Internet of Things (IoT) systems have recently been used to combat COVID-19 infections. [1,2] Many such systems are already in operation around the world for this purpose because they are well suited to the automation of data analysis and the processing of information collected by sensors, so as to eliminate the need for human intervention as much as possible. As the usage of both the IoT and big data increase, the number of different sensors that are employed, including biosensors, is also expected to undergo an explosive increase. [3] Consequently, the powering of these sensors will become an important social and economic issue, and energy harvesting, which converts unused kinetic energy into electrical energy, has attracted attention in this regard.Piezoelectric ceramics, magnetostrictive alloys, and their composites have all been studied with the aim of improving the performance of the materials and devices applied to energy harvesting. [4][5][6] In particular, piezoelectric ceramics and composites have a wide range of applications, [7][8][9][10][11] although research concerning magnetostrictive materials has also been conducted. [12][13][14][15][16] Energy harvesting devices that use the magnetostrictive effect are currently being investigated; however, the majority of such studies are focused on Fe-Dy-Tb (Terfenol-D) and Fe-Ga (Galfenol) alloys. Terfenol-D alloys are expensive and have the disadvantage of brittleness, [17,18] while Galfenol alloys have drawbacks in terms of mass productivity and processing cost. In contrast, Fe-Co alloys exhibit inferior magnetostrictive characteristics but are inexpensive and readily processed into wires. Therefore, the research and development of Fe-Co alloys has become very important.Recently, Katabira et al. [19] fabricated magnetostrictive polymer composites in which Fe-Co fibers were woven into a polyester fabric, and examined the performance of these composites as sensors. Wang et al. [20] also produced random magnetostrictive Fe-Co short fiber/polymer composite sheets and investigated the piezomagnetic coefficients of these materials both numerically and experimentally. Yang et al. [21]

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Kinetic motion sensors based on flexible and lead-free hybrid piezoelectric composite energy harvesters with nanowires-embedded electrodes for detecting articular movements

Cited by 66 publications

References 57 publications

Transparent Piezoelectric Polymer-Based Materials for Energy Harvesting and Multitouch Detection Devices

Transparent Piezoelectric Polymer-Based Materials for Energy Harvesting and Multitouch Detection Devices

High-performance piezoelectric nanogenerators featuring embedded organic nanodroplets for self-powered sensors

Effects of Heat Treatment and Cr Content on the Microstructures, Magnetostriction, and Energy Harvesting Performance of Cr‐Doped Fe–Co Alloys

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