Self‐Powered Cardiac Pacemaker Enabled by Flexible Single Crystalline PMN‐PT Piezoelectric Energy Harvester

Hwang, Geon Tae; Park, Hyewon; Lee, Jehee; Oh, Seung Jin; Park, Kwi Il; Byun, Myunghwan; Ahn, Gun; Jeong, Chang Kyu; No, Kwangsoo; Kwon, Hyuk‐Sang; Lee, Sang Goo; Joung, Boyoung; Lee, Keon Jae

doi:10.1002/adma.201400562

Cited by 581 publications

(357 citation statements)

References 41 publications

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“…58 The piezoelectric element in the device was a piece of PMN-PT single crystal thin film that had an area of 1.7 Â 1.7 cm 2 and was merely 8.4 lm thick. The PMN-PT thin film was first grown as a bulk material and then thinned down to the 8.4-lm thickness by chemical mechanical polishing (CMP), followed by an innovative layer transfer process 59 to transfer onto a polyethylene terephthalate (PET) plastic layer to achieve the flexible device.…”

Section: Piezoelectric Single Crystalsmentioning

confidence: 99%

Energy harvesting from low frequency applications using piezoelectric materials

Tian

Deng

2014

Applied Physics Reviews

544

340

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In an effort to eliminate the replacement of the batteries of electronic devices that are difficult or impractical to service once deployed, harvesting energy from mechanical vibrations or impacts using piezoelectric materials has been researched over the last several decades. However, a majority of these applications have very low input frequencies. This presents a challenge for the researchers to optimize the energy output of piezoelectric energy harvesters, due to the relatively high elastic moduli of piezoelectric materials used to date. This paper reviews the current state of research on piezoelectric energy harvesting devices for low frequency (0-100 Hz) applications and the methods that have been developed to improve the power outputs of the piezoelectric energy harvesters. Various key aspects that contribute to the overall performance of a piezoelectric energy harvester are discussed, including geometries of the piezoelectric element, types of piezoelectric material used, techniques employed to match the resonance frequency of the piezoelectric element to input frequency of the host structure, and electronic circuits specifically designed for energy harvesters.

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Section: Piezoelectric Single Crystalsmentioning

confidence: 99%

Energy harvesting from low frequency applications using piezoelectric materials

Tian

Deng

2014

Applied Physics Reviews

544

340

View full text Add to dashboard Cite

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“…However, the limited lifespan of the batteries challenged its long-term operation, and the replacement of batteries would bring a considerable risk to patients. For this reason, Hwang et al [63] fabricated a single crystalline PMN-PT piezoelectric energy harvester in order to power the pacemaker. The PMN-PT thin film was adhered on a flexible substrate so it can be implanted in the human body (Figure 12(a)).…”

Section: Perspective Applications Of Pehmentioning

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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“…One of the ultimate aims of these studies is to develop self-powering electronic devices to transform sustained energy sources into usable electrical energy [32,39,49,57,62,63]. In this context, energy scavenging from mechanical vibrations may offer several benefits to existing sensors and sensing systems, such as extended lifetimes, reduced maintenance, and smaller onboard weight [22,53,59].…”

Section: Introductionmentioning

confidence: 99%

Energy harvesting from underwater vibration of an annular ionic polymer metal composite

2015

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In this paper, we study underwater energy harvesting from bending vibrations of an annular ionic polymer metal composite (IPMC). The IPMC is clamped to a moving base, which harmonically excites the IPMC to vibrate along its fundamental axisymmetric mode shape. We model the IPMC as a thin plate, and the interaction with the surrounding fluid is described through a distributed hydrodynamic loading which is responsible for a marked reduction of the resonance spectrum through added mass effect. IPMC sensing is described though a lumped circuit model, comprising a resistor, a capacitor, a Warburg impedance, and a voltage source controlled by the mechanical curvature. In a series of experiments, the IPMC electrodes are shunted with a resistor, which is parametrically varied together with the excitation frequency to elucidate power harvesting. We also assess the effect of the IPMC geometry on power harvesting, by systematically varying the inner radius of the annulus to encompass five different configurations. Experimental results suggest that IPMC geometry has a primary role on its vibrations, whereby increasing the inner radius results into a significant increase of the resonance frequency. Such an increase does, in turn, produce a robust improvement in power harvesting that increases of two orders of magnitude as the ratio between the inner and the outer radius varies from 0.23 to 0.5.

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Self‐Powered Cardiac Pacemaker Enabled by Flexible Single Crystalline PMN‐PT Piezoelectric Energy Harvester

Cited by 581 publications

References 41 publications

Energy harvesting from low frequency applications using piezoelectric materials

Energy harvesting from low frequency applications using piezoelectric materials

Ferroelectric materials for vibrational energy harvesting

Energy harvesting from underwater vibration of an annular ionic polymer metal composite

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