Flexible Energy Harvester with Piezoelectric and Thermoelectric Hybrid Mechanisms for Sustainable Harvesting

Oh, Yongkeun; Kwon, Daeho; Eun, Youngkee; Kim, Min Ook; Ko, Hee Jin; Kang, Sung Gwon; Kim, Jongbaeg

doi:10.1007/s40684-019-00132-2

Cited by 50 publications

(21 citation statements)

References 21 publications

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“…Besides, when these devices are used individually, a portion of ambient energy goes unharvested. [349] For example, when a solar energy harvester is used, body heat, [351,352] biofuel, [353] biomechanical energies [354][355][356] go unutilized. [349,357,358] Thus, integrating them into hybrid devices can maximize the ambient energy utilization providing a robust and reliable way to harvest energy.…”

Section: Hybrid Devicesmentioning

confidence: 99%

Energy Harvesting and Storage with Soft and Stretchable Materials

et al. 2021

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Soft robotics can interact with humans safely. 3) Devices built from stretchable materials have a greater mechanical degree of freedom. This allows electronics, displays, and sensors to be integrated into places that would be difficult or impossible with rigid devices and enables new types of human-computer interfaces. It also allows robotics to have enhanced levels of dexterity and complexity in movement (consider the octopus as an inspiring example). 4) Devices that can be deformed elastically can be engineered to have new or emerging properties, such as antennas that change frequency with elongation, [21] intelligent materials that can perform unconventional forms of logic, [22,23] or composites that change thermal conductivity, [24] electrical conductivity, [25] or dielectric properties with deformation. [26][27][28] Most robotic and electronic devices require electricity to function, as shown on the left side of Figure 1A. Electricity can power sensors, enable computation, drive locomotion, and transmit information. Although most devices use electricity from an outlet, such "tethered" devices create notable limitations. In addition to limiting the degree of freedom of robotic materials, plug-in devices must be within a chords-length of a functioning outlet, thereby confining the range of use of such devices. Although battery operated devices can operate for some time without being plugged-in, the need to do so periodically is at best a nuisance that limits the operating time of a device. At worst, it can lead to issues such as lack of compliance with wearable devices (that is, the device is taken off for charging and never put back on) or disruptions in operation (a particular problem for health care devices or remotely deployed devices). Thus, there is a compelling interest in harvesting energy from the ambient to create tetherless devices or even devices that need less charging. Figure 1A (right side) provides examples of applications that may benefit from harvesting, such as internetof-things (IOT) devices, soft robots, wearables, implantables, and deployables (that is, devices sent to remote locations that do not have electrical outlets). Energy Harvesting CategoriesStrategies to harness energy typically convert waste or otherwise unused energy from the ambient into electricity. Although This review highlights various modes of converting ambient sources of energy into electricity using soft and stretchable materials. These mechanical properties are useful for emerging classes of stretchable electronics, e-skins, bio-integrated wearables, and soft robotics. The ability to harness energy from the environment allows these types of devices to be tetherless, thereby leading to a greater range of motion (in the case of robotics), better compliance (in the case of wearables and e-skins), and increased application space (in the case of electronics). A variety of energy sources are available including mechanical (vibrations, human motion, wind/fluid motion), electromagnetic (radio frequency (RF), solar), and ther...

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Section: Hybrid Devicesmentioning

confidence: 99%

Energy Harvesting and Storage with Soft and Stretchable Materials

et al. 2021

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“…Over the past decade, we have witnessed the development of hybrid energy cells for multimode energy harvesting including but not limited to piezoelectric and photovoltaic ( Xu and Wang, 2011 ), piezoelectric and thermoelectric/pyroelectric ( Oh et al., 2019 ; Song et al., 2019a ; You et al., 2018 ; Zhu et al., 2019b , 2020f ), piezoelectric and biochemical ( Hansen et al., 2010 ; Pan et al., 2011 ), triboelectric and photovoltaic ( Guo et al., 2019 ; Jung et al., 2020 ; Liu et al., 2018d ; Song et al., 2019b ), triboelectric and thermoelectric/pyroelectric ( Seo et al., 2019 ; Shin et al., 2020 ; Wang et al., 2020e ; Wu et al., 2018 ), triboelectric and biochemical ( Li et al., 2020 ), and three mechanisms among them ( Jella et al., 2018 ; Ji et al., 2019 ; Wang et al., 2016b ; 2016c ). Targeting for wearable applications, the material choices and structure designs of the hybrid EH would be more challenging considering the high performance and good flexibility.…”

Section: Hybridized Ehs For Multi-sourcesmentioning

confidence: 99%

Flourishing energy harvesters for future body sensor network: from single to multiple energy sources

Guo

Lee

2021

iScience

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Summary Body sensor network (bodyNET) offers possibilities for future disease diagnosis, preventive health care, rehabilitation, and treatment. However, the eventual realization demands reliable and sustainable power sources. The flourishing energy harvesters (EHs) have provided prominent techniques for practically addressing the concurrent energy issue. Targeting for a specific energy source, wearable EHs with a sole conversion mechanism are well investigated. Hybrid EHs integrating different effects for a single source or multi-sources are attaining growing attention, for they provide another degree of freedom concerning a higher-level energy utility. Merging EHs with other functional electronics, diversified functional self-sustainable systems are developed, paving the way for the accomplishment of bodyNET. This review introduces the evolution of wearable EHs from a single effect to hybridized mechanisms for multiple energy sources and wearable to implantable self-sustainable systems. Last, we provide our perspectives on the future development of hybrid EHs to be more competitive with conventional batteries.

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“…At the same time, the cost of replacing the battery also further restricts the use of these devices. Therefore, the question of how to harvest energy from the surrounding environment to power these devices, instead of simply using batteries, has attracted widespread attention [ 3 , 4 , 5 , 6 ]. There are many forms of energy in the natural environment, such as solar energy, wind energy, vibration energy and thermal energy [ 7 , 8 , 9 , 10 ], and the commonly used energy harvesting mechanisms include photoelectric, piezoelectric [ 11 , 12 ], electromagnetic [ 13 , 14 , 15 ], electrostatic [ 16 ] and triboelectric effects [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Mode Broadband Vibration Energy Harvester Composed of Symmetrically Distributed U-Shaped Cantilever Beams

2021

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Using the piezoelectric effect to harvest energy from surrounding vibrations is a promising alternative solution for powering small electronic devices such as wireless sensors and portable devices. A conventional piezoelectric energy harvester (PEH) can only efficiently collect energy within a small range around the resonance frequency. To realize broadband vibration energy harvesting, the idea of multiple-degrees-of-freedom (DOF) PEH to realize multiple resonant frequencies within a certain range has been recently proposed and some preliminary research has validated its feasibility. Therefore, this paper proposed a multi-DOF wideband PEH based on the frequency interval shortening mechanism to realize five resonance frequencies close enough to each other. The PEH consists of five tip masses, two U-shaped cantilever beams and a straight beam, and tuning of the resonance frequencies is realized by specific parameter design. The electrical characteristics of the PEH are analyzed by simulation and experiment, validating that the PEH can effectively expand the operating bandwidth and collect vibration energy in the low frequency. Experimental results show that the PEH has five low-frequency resonant frequencies, which are 13, 15, 18, 21 and 24 Hz; under the action of 0.5 g acceleration, the maximum output power is 52.2, 49.4, 61.3, 39.2 and 32.1 μW, respectively. In view of the difference between the simulation and the experimental results, this paper conducted an error analysis and revealed that the material parameters and parasitic capacitance are important factors that affect the simulation results. Based on the analysis, the simulation is improved for better agreement with experiments.

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Flexible Energy Harvester with Piezoelectric and Thermoelectric Hybrid Mechanisms for Sustainable Harvesting

Cited by 50 publications

References 21 publications

Energy Harvesting and Storage with Soft and Stretchable Materials

Energy Harvesting and Storage with Soft and Stretchable Materials

Flourishing energy harvesters for future body sensor network: from single to multiple energy sources

A Multi-Mode Broadband Vibration Energy Harvester Composed of Symmetrically Distributed U-Shaped Cantilever Beams

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