Stacked piezoelectric energy harvesting device by printing process

Kamata, Yuki; Yoon, Dong Hyun; Sasaki, Tomohiro; Nozaki, Yoshito; Yamaura, Shin Ichi; Sekiguchi, Tetsushi; Nakajima, Takashi; Shoji, Shuichi

doi:10.1049/mnl.2016.0518

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…The final morphology and structures of P(VDF-TrFE) highly depend on the annealing temperature (T a ). [58][59][60][61][62][63][64][65][66] The annealing is usually performed in a temperature range between the glass transition temperature (T g ) and the melting temperature (T m ) of the polymer, that is, T g < T a < T m . There is, however, an optimal annealing temperature for a polymer.…”

Section: Annealingmentioning

confidence: 99%

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The tuning of crystallization behavior of ferroelectric poly(vinylidene fluoride‐co‐trifluoroethylene)

Bai,

Li,

Chu

et al. 2023

Journal of Polymer Science

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Poly (vinylidene fluoride‐co‐trifluoroethylene) [P(VDF‐TrFE)] has three crystal forms, including paraelectric α, ferroelectric β, and γ phases. In previous studies, the properties and performances of P(VDF‐TrFE) have been the focus of research. However, the formation mechanism and regulation mode of various crystal forms remain unclear. Therefore, it is an important topic for further research to elucidate, summarize, and prospect the polymorphism of P(VDF‐TrFE) and regulate the crystal forms. This review systematically summarizes the crystalline structure and phase transition between ferroelectric and paraelectric phase of P(VDF‐TrFE) crystals; discusses the influence of annealing, blending and electric field on the crystallinity, selection of polymorphic crystals, and phase transition behavior between them; reviews the effects of annealing, melt‐recrystallization, substrate and nanoconfinement on the crystal orientation. Finally, the effects of the crystal structure of P(VDF‐TrFE) on its properties are briefly summarized.

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Section: Annealingmentioning

confidence: 99%

“…The annealing treatment along with thickening of lamellae and enlarging crystalline grain size plays an important role on enhancing the crystallinity (Figure 2A). The final morphology and structures of P(VDF‐TrFE) highly depend on the annealing temperature ( T a ) 58–66 …”

Section: Influencing Factors On the Crystallinitymentioning

confidence: 99%

The tuning of crystallization behavior of ferroelectric poly(vinylidene fluoride‐co‐trifluoroethylene)

Bai,

Li,

Chu

et al. 2023

Journal of Polymer Science

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“…At present, there are many studies on piezoelectric energy harvesters. The common energy harvesters are cantilever beam type [11][12][13][14][15], cymbal type [16][17][18], multilayer stack type [19,20], bridge type [21,22], arch type [23][24][25], etc., and there are new energy harvesters [26][27][28][29] 2,201,2424 made of composite materials, such as piezoelectric fiberboard (MFC), polyvinylidene fluoride (PVDF), and piezoelectric film.…”

Section: Introductionmentioning

confidence: 99%

Design of an Energy Harvester Based on a Rubber Bearing Floating Slab Track

Yu,

Li,

Jin

et al. 2023

Applied Sciences

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It is known that a large amount of vibration mechanical energy will be generated during train operation. If the mechanical energy can be obtained from the track structure, it can greatly optimize the energy configuration of the metro. Currently, most sensors are limited to disk or cymbal structures and are not used in the track bed; different from existing structures, this paper designs a spherical energy harvester based on a rubber bearing floating slab track, wherein the size range of the spherical energy harvesting structure was approximately determined based on the geometric spatial relationships of the actual track bed internal structure. Compared to the traditional disk and cymbal energy harvesters, the mechanical and electrical properties of the spherical energy harvesting structure was studied by a numerical simulation method, and the optimal size of the spherical energy was determined by calculation. The main conclusions are as follows: (1) Compared with the traditional disk harvester and cymbal harvester, the spherical harvester had better mechanical and electrical properties. (2) By calculating the output power of energy harvesters under load matching, we found that the output power of the spherical harvester was two orders of magnitude higher than that of the disk harvester and 53% higher than that of the cymbal harvester. (3) The optimum size of the spherical harvester was when the thickness of piezoelectric layer was 2 mm, the radius was 16 mm, the axial ratio of the spherical shell was 0.4, and the thickness of the spherical shell was 4 mm.

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“…We previously reported a simple fabrication process for a VDF=TrFE copolymer harvester, which circumvents the sputter and vapor deposition processes, to address these issues. 11) In this study, we investigated a VDF=TrFE copolymer film to fabricate an energy harvester, which could be actuated without polling, by controlling the polymer film thickness. We found that the crystallinity of the VDF=TrFE copolymer is affected by its thickness by observing the polymer crystallization by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) analysis.…”

mentioning

confidence: 99%

Analysis of vinylidene fluoride–trifluoroethylene copolymer film for nonpolarized energy harvester

Kamata

Sekiguchi

Nakajima

et al. 2017

Jpn. J. Appl. Phys.

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In this paper, an investigation of a vinylidene fluoride–trifluoroethylene (VDF/TrFE) copolymer film for use in a nonpolarized energy harvester is presented. The Fourier transform infrared spectroscopy and X-ray diffraction analysis of a nonpolarized VDF/TrFE copolymer film indicate that polymer crystallinity depends on film thickness. Furthermore, the growth of the polar structure (β phase) is observed upon the reduction in the thickness. However, power generation does not exhibit a linear behavior because the generation capacity increases with the thickness. These results indicate that the film thickness for a nonpolarized harvester must be optimized to obtain the maximum output.

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Stacked piezoelectric energy harvesting device by printing process

Cited by 6 publications

References 10 publications

The tuning of crystallization behavior of ferroelectric poly(vinylidene fluoride‐co‐trifluoroethylene)

The tuning of crystallization behavior of ferroelectric poly(vinylidene fluoride‐co‐trifluoroethylene)

Design of an Energy Harvester Based on a Rubber Bearing Floating Slab Track

Analysis of vinylidene fluoride–trifluoroethylene copolymer film for nonpolarized energy harvester

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