A flexible hybrid strain energy harvester using piezoelectric and electrostatic conversion

Eun, Youngkee; Kwon, Daeho; Kim, Min Ook; Yoo, Il-Seon; Sim, Ji Hoon; Ko, Hee Jin; Cho, Kyung Ho; Kim, Jongbaeg

doi:10.1088/0964-1726/23/4/045040

Cited by 60 publications

(30 citation statements)

References 29 publications

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“…Different kinetic energy conversion methods in combination are able to compensate each other, thus boosting the output power. Various types of kinetic (including fluidic) hybridization involving two energy conversion effects have been developed, including piezoelectric–electromagnetic, electrostrictive–electrets, piezoelectric–triboelectric, electromagnetic–triboelectric, piezoelectric–electrostatic, triboelectric–electrostatic, and piezoelectric–electrostrictive . Hybridization involving three kinetic energy conversion effects, piezoelectric–electromagnetic–triboelectric, has also been reported.…”

Section: Hybridization Of Energy Harvestersmentioning

confidence: 99%

Energy Harvesting Research: The Road from Single Source to Multisource

2018

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Energy harvesting technology may be considered an ultimate solution to replace batteries and provide a long-term power supply for wireless sensor networks. Looking back into its research history, individual energy harvesters for the conversion of single energy sources into electricity are developed first, followed by hybrid counterparts designed for use with multiple energy sources. Very recently, the concept of a truly multisource energy harvester built from only a single piece of material as the energy conversion component is proposed. This review, from the aspect of materials and device configurations, explains in detail a wide scope to give an overview of energy harvesting research. It covers single-source devices including solar, thermal, kinetic and other types of energy harvesters, hybrid energy harvesting configurations for both single and multiple energy sources and single material, and multisource energy harvesters. It also includes the energy conversion principles of photovoltaic, electromagnetic, piezoelectric, triboelectric, electrostatic, electrostrictive, thermoelectric, pyroelectric, magnetostrictive, and dielectric devices. This is one of the most comprehensive reviews conducted to date, focusing on the entire energy harvesting research scene and providing a guide to seeking deeper and more specific research references and resources from every corner of the scientific community.

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Section: Hybridization Of Energy Harvestersmentioning

confidence: 99%

Energy Harvesting Research: The Road from Single Source to Multisource

2018

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“…This energy could come from joint bending, [59][60][61] direct force such as tapping or pushing on the clothing, 62 friction between the relative motion of two components of clothing, [63][64][65] or chest expansion. 66 Much work has focused on developing flexible and stretchable transducer materials 63,64,[67][68][69][70] and integrating transducers into clothing. 65,69 Material issues are covered in more detail in the following section.…”

Section: Mechanical Clothing-integrated Harvesters System Considerationsmentioning

confidence: 99%

“…65,69 Material issues are covered in more detail in the following section. Here, we simply note that transducers are generally piezoelectric, 62,69,70 electrostatic, 68 or triboelectric. [63][64][65] There are fewer papers demonstrating clothing-integrated harvesting systems.…”

Section: Mechanical Clothing-integrated Harvesters System Considerationsmentioning

confidence: 99%

Materials and approaches for on-body energy harvesting

Roundy

Trolier‐McKinstry

2018

MRS Bull.

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“…Wearable energy harvesters converting human motion into electricity have been widely studied based on various energy conversion methods . Among the diverse energy harvesters, triboelectric energy harvesters based on triboelectrification, caused by contact between two materials with different electronegativity, have been reported since 2012 .…”

Section: Introductionmentioning

confidence: 99%

Humidity‐Resistant, Fabric‐Based, Wearable Triboelectric Energy Harvester by Treatment of Hydrophobic Self‐Assembled Monolayers

Kim

Pyo

Song

et al. 2018

Adv Materials Technologies

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various fabrics [7][8][9][10][11][12] and fibers [13][14][15] for fabricating triboelectric energy harvesters. Fabric-or fiber-based wearable energy harvesters facilitate lightweight energy generation systems that are comfortable for the wearer. [1] However, the output voltage of triboelectric energy harvesters is drastically reduced by adsorbed water molecules, [16] such as humidity originating from the body, rain, or other surrounding environmental conditions. In general, the output voltage of a triboelectric energy harvester is proportional to the charge density of the contact surface. [17] Under high relative humidity conditions, a thick adsorbed water layer increases the conductivity of the contact surface, causing dissipation of surface charges induced by triboelectrification to another material. [18,19] The decreased charge density of the contact surface results in the deterioration of the output voltage; therefore, there is motivation to develop a humidity-resistant, wearable, triboelectric energy harvester. To date, there have been some efforts to impart humidity resistance to triboelectric energy harvesters. [20][21][22][23][24][25][26] For example, Seol et al. reported a triboelectric vibrational energy harvester sealed in an acrylic tube to reduce the penetration of humidity; this device showed excellent resistance to ambient humidity. [20] Additionally, various methods for fabricating humidity-resistant triboelectric energy harvesters have been reported, including a hydrophobic microsponge structure, [21,22] nature-replicating micro-/nanostructure, [23] and micro/nanosurface morphologies [24,25] using polystyrene microbeads and natural materials with micro-/nanomorphologies as a template or mold. However, no further research has been undertaken to apply these techniques to fabric-based, wearable triboelectric energy harvesters.Kim et al. reported a fabric-based, wearable, humidityresistant triboelectric energy harvester by fabricating individual ZnO-polydimethylsiloxane core-shell fibers. [26] Each core-shell fiber was sealed at both sides by a polymer and then woven to prepare a fabric-based triboelectric energy harvester. This harvester showed excellent humidity resistance up to a relative humidity of 95%; however, the fabrication of the humidityresistant fabric is very complicated as it required the formation of nanostructures, fiber-combining, and sealing of each fiber.The development of fabric-based triboelectric energy harvesters is of great interest for converting human motion into electricity and is relevant for the development of wearable electronics. However, such harvesters exhibit significant degradation in performance under high humidity conditions. To solve this problem, a humidity-resistant, fabric-based triboelectric energy harvester by depositing self-assembled monolayers (SAM) to increase the hydrophobicity of the fabric surface is demonstrated. The SAM coating is compatible with various fabrics and a noticeable improvement in triboelectric performance under high humidity conditions...

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A flexible hybrid strain energy harvester using piezoelectric and electrostatic conversion

Cited by 60 publications

References 29 publications

Energy Harvesting Research: The Road from Single Source to Multisource

Energy Harvesting Research: The Road from Single Source to Multisource

Materials and approaches for on-body energy harvesting

Humidity‐Resistant, Fabric‐Based, Wearable Triboelectric Energy Harvester by Treatment of Hydrophobic Self‐Assembled Monolayers

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