Bimorph piezoelectric vibration energy harvester with flexible 3D meshed-core structure for low frequency vibration

Tsukamoto, Takuya; Umino, Yohei; Shiomi, Sachie; Yamada, Kou; Suzuki, Takao

doi:10.1080/14686996.2018.1508985

Cited by 37 publications

(19 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Energy harvesting from environmental mechanical sources such as body movements including finger imparting,8 pushing,9 stretching,10 bending,11 twisting,12 air flow,13 transportation movement,14 and sound waves15 has attracted widespread attention to promote flexible self‐powered devices 16. The best common mechanical energy harvesting methods are based on piezoelectric materials 17.…”

Section: Introductionmentioning

confidence: 99%

Wearable Electronic Textiles from Nanostructured Piezoelectric Fibers

Mokhtari

Spinks

Fay

et al. 2020

Adv Materials Technologies

119

View full text Add to dashboard Cite

to produce a new generation of smart garments.Such affordable smart garments could fulfil diverse applications, ranging from work wear in specific industries to the almost infinite scenarios of personal use including energy harvesting/storage, force/pressure measurement, porosity or color variation, and sensors (movement, temperature, chemicals). [1][2][3][4][5][6][7] However, performance, scalability, and cost problems have restricted the deployment of currently available smart textiles. To build smart textiles on an industrial scale, method of manufacturing and material selection are two important requirements. The approach of new energy materials and novel fabrication methods are essential to develop wearable technologies. Wearable energy generating devices that can be seamlessly integrated into garments are a critical component of the wearable electronics genre. Currently flexible fiber energy harvesters have attracted significant attention due to their ability to be integrated into fabrics, or stitched into existing textiles. Large-scale production of energy harvester fibers using conventional manufacturing processes, however, is still a challenge.Energy harvesting from environmental mechanical sources such as body movements including finger imparting, [8] pushing, [9] stretching, [10] bending, [11] twisting, [12] air flow, [13] transportation movement, [14] and sound waves [15] has attracted widespread attention to promote flexible self-powered devices. [16] The best common mechanical energy harvesting methods are based on piezoelectric materials. [17] Piezoelectric materials can be classified in three categories: piezoelectric ceramics, piezoelectric polymers, and piezoelectric composites. [18] Unlike the energy harvesters utilizing solar or thermal energy, performance of piezoelectric generators is generally not limited by environmental factors. [19] Piezoelectric generators have received massive interest in energy harvesting technology due to their unique ability to capture the ambient vibrations to generate electric signals. [20] The unique energy transduction of piezoelectric materials enables their applications in fields of energy harvesting, actuators, [21] sensors, [22] structural health monitoring, and use in biomedical devices. [23] Numerous approaches have been used to fabricate piezoelectric generators, such as coating, [24] spinning, [25] depositing, [26] and printing. [27] Wearable energy harvesting is of practical interest for many years and for diverse applications, including development of self-powered wireless sensors within garments for human health monitoring. Herein, a novel approach is reported to create wearable energy generators and sensors using nanostructured hybrid piezoelectric fibers and exploiting the enormous variety of textile architectures. It is found that high performance hybrid piezofiber is obtained using a barium titanate (BT) nanoparticle and poly(vinylidene fluoride) (PVDF) with a mass ratio of 1:10. These fibers are knitted to form a wearable energy generator that pr...

show abstract

Section: Introductionmentioning

confidence: 99%

Wearable Electronic Textiles from Nanostructured Piezoelectric Fibers

Mokhtari

Spinks

Fay

et al. 2020

Adv Materials Technologies

119

View full text Add to dashboard Cite

show abstract

“…The sample with nanosized unevenness was prepared by oxygen ashing (16) and the samples with a microsized 3D structure were formed by 3D lithography. (13)(14)(15) In the 3D lithography method, both a photoresist-coated substrate and a photomask are fixed to an adjustable table that controls the table angle and rotation speed. The substrate is exposed from an inclination direction while rotating at a constant speed.…”

Section: Fabrication Of Mold With 3d Microstructures and Electrodementioning

confidence: 99%

“…We propose a novel forming method to simultaneously perform the solidification, polarization, and microstructure transfer of the solidified ionic liquid using a mold with 3D micropatterns fabricated by 3D lithography. (13)(14)(15) The power generation performance characteristics of the fabricated VEHs were evaluated by vibration tests.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Solidified Ionic Liquid with 3D Microstructures and Its Application to Vibration Energy Harvester

Iida¹,

Tsukamoto²,

Miwa³

et al. 2019

Sensors and Materials

Self Cite

View full text Add to dashboard Cite

In this study, we propose a solidified ionic liquid with a 3D microstructure to increase its surface area for the performance enhancement of a vibration energy harvester (VEH). By soft lithography in MEMS technologies, the use of a mold is proposed to perform the solidification, polarization, and microstructure transfer of the solidified ionic liquid simultaneously. We fabricated six samples with different surface shapes and sizes to compare the power generation performance characteristics of VEHs using a solidified ionic liquid. According to a vibration test, the performance of the VEH with nanometer roughness was improved at a 10 Hz frequency. Also, the output power of the VEH with a micro-folded hollow conical structure was improved at a 50 Hz frequency.

show abstract

“…On the other hand, and despite of the relatively low electromechanical coupling coefficients, PVDF-based harvesters are environmentally friendly, allow large deformations, have greater resistance to mechanical shocks, and are much lower in their economic cost [14,15]. Nevertheless, the main advantage of PVDF-based energy harvesters has been their superiority in scavenging mechanical energy at low frequencies leading to an increased interest over the recent years to study their performance within such category of energy harvesting applications [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Solar Panels as Tip Masses in Low Frequency Vibration Harvesters

et al. 2019

View full text Add to dashboard Cite

Tip masses are used in cantilevered piezoelectric energy harvesters to shift device resonance towards the required frequency for harvesting and to improve the electric power generation. Tip masses are typically in the form of concentrated passive weights. The aim of this study is to assess the inclusion of solar panels as active tip masses on the dynamics and power generation performance of cantilevered PVDF (polyvinylidene fluoride)-based vibration energy harvesters. Four different harvester geometries with and without solar panels are realized using off-the-shelf components. Our experimental results show that the flexible solar panels considered in this study are capable of reducing resonance frequency by up to 14% and increasing the PVDF power generated by up to 54%. Two analytical models are developed to investigate this concept; employing both an equivalent concentrated tip mass to represent the case of flexible solar panels and a distributed tip mass to represent rigid panels. Good prediction agreement with experimental results is achieved with an average error in peak power of less than 5% for the cases considered. The models are also used to identify optimum tip mass configurations. For the flexible solar panel model, it is found that the highest PVDF power output is produced when the length of solar panels is two thirds of the total length. On the other hand, results from the rigid solar panel model show that the optimum length of solar panels increases with the relative tip mass ratio, approaching an asymptotic value of half of the total length as the relative tip mass ratio increases significantly.

show abstract

Bimorph piezoelectric vibration energy harvester with flexible 3D meshed-core structure for low frequency vibration

Cited by 37 publications

References 27 publications

Wearable Electronic Textiles from Nanostructured Piezoelectric Fibers

Wearable Electronic Textiles from Nanostructured Piezoelectric Fibers

Fabrication of Solidified Ionic Liquid with 3D Microstructures and Its Application to Vibration Energy Harvester

Solar Panels as Tip Masses in Low Frequency Vibration Harvesters

Contact Info

Product

Resources

About