Piezoelectric shell structures as wearable energy harvesters for effective power generation at low-frequency movement

Yang, Boram; Yun, Kwang-Seok

doi:10.1016/j.sna.2012.03.026

Cited by 88 publications

(63 citation statements)

References 21 publications

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“…A number of attempts have been made to harvest energy from basic human activities such as walking, running, finger and elbow/shoulder movement, and shaking limbs [36][37][38][39][40][41]. While most of these devices are wearable on different places of the human body, they are quite uncomfortable.…”

Section: System Architecture and Its Operationmentioning

confidence: 99%

Design and experiment of a human-limb driven, frequency up-converted electromagnetic energy harvester

Halim

Cho

Park

2015

Energy Conversion and Management

186

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Section: System Architecture and Its Operationmentioning

confidence: 99%

Design and experiment of a human-limb driven, frequency up-converted electromagnetic energy harvester

Halim

Cho

Park

2015

Energy Conversion and Management

186

View full text Add to dashboard Cite

“…Yang and Yun [65] shaped PVDF into a shell structure which can be set at human's joints such as elbows or fingers (Figure 13(a)). The output power reached 0.87 mW.…”

Section: Perspective Applications Of Pehmentioning

confidence: 99%

“…Color online) Wearable devices scavenging the energy during human walk from (a) bending of body joints (reprinted from ref [65],. with permission from Elsevier), (b) pressure on shoes (reprinted from ref [66],.…”

mentioning

confidence: 99%

Ferroelectric materials for vibrational energy harvesting

Song

Wang

2016

Sci. China Technol. Sci.

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Energy harvesting is an appealing technology that makes use of the ambient energy which is otherwise wasted. Piezoelectric materials directly convert the elastic energy to the electric energy, and thus have a great advantage in scavenging vibrational energy for simplicity in device structure with relatively high power density. This paper provides an overview on the research of piezoelectric materials in energy harvesting in recent decades, from basics of piezoelectricity and working principle of energy harvesting with piezoelectric materials, to the progress of development of high-performance piezoelectrics including ceramics, single crystals and polymers, then to experimental attempts on the device fabrication and optimization, finally to perspective applications of piezoelectric energy harvesting (PEH). The criteria for selection of materials for PEH applications are introduced. Not only the figure of merit but also maximum allowable stress of materials are taken into account in the evaluation of their potential in achieving high energy density and output power density. The influence of the device configuration on the performance is also acknowledged and discussed. The magnitude and distribution of induced stress in the piezoelectric unit upon excitation by the vibration source play an important role in determining the output power density and can be tuned via proper design of device configuration without changing its resonant frequency. Approaches to address the issue of frequency match accompanying with the resonant mode are illustrated with literature examples. Usage of PEH devices can be extended to a variety of vibration sources in everyday life as well as in nature. Some appealing applications of PEH, such as in implantable and wearable devices, are reviewed. energy harvesting, ferroelectric materials, piezoelectricity, figure of merit, applications Citation:Song J D, Wang J. Ferroelectric materials for vibrational energy harvesting.

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“…Among these, piezoelectric energy harvesting has gained significant research interest because it provides high power density and is applicable to real life. The simple mechanism provides opportunities to harvest vibrational energy from movements of human limbs, 1,2 joints, 3,4 footsteps, 5,6 clothes, 7 magnetic forces 8 and wind. 9 However, the mechanical-electrical coupling phenomenon has high nonlinearity 10 and has been difficult to analyze.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of PZT-Based Piezoelectric Cantilever Beam by Using Computational Experiments

Kim

Park

Lim

et al. 2016

Journal of Elec Materi

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Piezoelectric energy harvesting is gaining huge research interest since it provides high power density and has real-life applicability. However, investigative research for the mechanical-electrical coupling phenomenon remains challenging. Many researchers depend on physical experiments to choose devices with the best performance which meet design objectives through case analysis; this involves high design costs. This study aims to develop a practical model using computer simulations and to propose an optimized design for a lead zirconate titanate (PZT)-based piezoelectric cantilever beam which is widely used in energy harvesting. In this study, the commercial finite element (FE) software is used to predict the voltage generated from vibrations of the PZT-based piezoelectric cantilever beam. Because the initial FE model differs from physical experiments, the model is calibrated by multi-objective optimization to increase the accuracy of the predictions. We collect data from physical experiments using the cantilever beam and use these experimental results in the calibration process. Since dynamic analysis in the FE analysis of the piezoelectric cantilever beam with a dense step size is considerably time-consuming, a surrogate model is employed for efficient optimization. Through the design optimization of the PZT-based piezoelectric cantilever beam, a high-performance piezoelectric device was developed. The sensitivity of the variables at the optimum design is analyzed to suggest a further improved device.

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Piezoelectric shell structures as wearable energy harvesters for effective power generation at low-frequency movement

Cited by 88 publications

References 21 publications

Design and experiment of a human-limb driven, frequency up-converted electromagnetic energy harvester

Design and experiment of a human-limb driven, frequency up-converted electromagnetic energy harvester

Ferroelectric materials for vibrational energy harvesting

Design Optimization of PZT-Based Piezoelectric Cantilever Beam by Using Computational Experiments

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