A novel vibrational energy harvester with electric double layer electrets

Ono, Shimpei; Miwa, Kenji; Iori, J; Mitsuya, Hiroyuki; Ishibashi, Keiji; Sano, Chikako; Toshiyoshi, Hiroshi; Fujita, Hiroyuki

doi:10.1088/1742-6596/773/1/012074

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…Recently, electric double layer electrets (EDLEs) have been developed. [60,61] EDLEs are unique in their use of the EDL of the electrolyte as a permanent charge. The EDLE is formed by anchoring the motion of ions inside the IL gel after the formation of the EDL, and it can sustain the EDL without any external bias-voltage source.…”

Section: Electric Double Layer Electretmentioning

confidence: 99%

Recent Advanced Applications of Ionic Liquid for Future Iontronics

Ono¹

2023

The Chemical Record

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Recently, electronic devices that make use of a state called the electric double layers (EDL) of ion have opened up a wide range of research opportunities, from novel physical phenomena in solid‐state materials to next‐generation low‐power consumption devices. They are considered to be the future iontronics devices. EDLs behave as nanogap capacitors, resulting the high density of charge carriers is induced at semiconductor/electrolyte by applying only a few volts of the bias voltage. This enables the low‐power operation of electronic devices as well as new functional devices. Furthermore, by controlling the motion of ions, ions can be used as semi‐permanent charge to form electrets. In this article, we are going to introduce the recent advanced application of iontronics devices as well as energy harvesters making use of ion‐based electrets, leading to the future iontronics research.

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Section: Electric Double Layer Electretmentioning

confidence: 99%

Recent Advanced Applications of Ionic Liquid for Future Iontronics

Ono¹

2023

The Chemical Record

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“…The movable electrode was manufactured using electrical discharge machining on a 500 μm-thick phosphor bronze (C5191) substrate. The out-of-plane resonant frequency was designed at 105 Hz by a finite-element-method simulation using COMSOL Multiphysics 5.6, which is higher than those of typical contact-mode EDLE-based VEH devices [3,7]. An EDLE film was prepared by polymerization of an ionic liquid, a photoinitiator, polymer, and base material with UV irradiation [8].…”

Section: System Developmentmentioning

confidence: 99%

“…Recently, electric-double-layer electrets (EDLEs) [3] have been developed that can be manufactured at room temperature, whereas conventional electrets require process temperatures of 100 • C or higher during film deposition [4] or charge treatment [2,5]. Furthermore, EDLs are known to have huge capacitance [6], and there is a large surface charge at the interface of EDLs.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, a VEH device with EDLEs that utilize EDLs as electrets, is expected to have a higher surface charge density and hence a higher output power, compared to conventional electret-based harvesters. In VEH using EDLEs, contact modes, which requires physical contact between EDLEs and moving counter electrodes, are typically used, and the operating frequency ranges have been limited to 1 to several tens of hertz because of the reliability of the physical contacts [3,7]. To expand the use environment of VEH with EDLEs, we have developed a non-contact mode EDLE VEH device using in-plane vibration [8].…”

Section: Introductionmentioning

confidence: 99%

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Demonstration of Non‐contact Out‐of‐Plane Vibration Energy Harvesting Using an Electric‐Double‐Layer Electret

Nota

Tamura

Miwa

et al. 2023

IEEJ Transactions Elec Engng

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This paper reports demonstration results of non‐contact out‐of‐plane vibration energy harvesting using an electric‐double‐layer electret (EDLE). Unlike contact types or non‐contact in‐plane types, the proposed operation type can be useful in terms of expanding the operating frequency range and simplifying the device structures. A demonstration system is developed, and power generation is confirmed using an EDLE with a surface potential of −1 V under an atmospheric condition. © 2023 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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“…We have investigated the application of ionic liquids to vibrational energy harvesters [ 16 ] and developed a method to form an ionic liquid polymer with cations immobilized at the surface [ 17 ]. The surface-charge-fixed polymer is synthesized by solidifying a polymer matrix mixed with an ionic liquid in the presence of an external electric field.…”

Section: Introductionmentioning

confidence: 99%

Triboelectric energy harvesting with surface-charge-fixed polymer based on ionic liquid

Sano

Mitsuya²,

Ono

et al. 2018

Science and Technology of Advanced Materials

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A novel triboelectric energy harvester has been developed using an ionic liquid polymer with cations fixed at the surface. In this report, the fabrication of the device and the characterization of its energy harvesting performance are detailed. An electrical double layer was induced in the ionic liquid polymer precursor to attract the cations to the surface where they are immobilized using a UV-based crosslinking reaction. The finalized polymer is capable of generating an electrical current when contacted by a metal electrode. Using this property, energy harvesting experiments were conducted by cyclically contacting a gold-surface electrode with the charge fixed surface of the polymer. Control experiments verified the effect of immobilizing the cations at the surface. By synthesizing a polymer with the optimal composition ratio of ionic liquid to macromonomer, an output of 77 nW/cm2 was obtained with a load resistance of 1 MΩ at 1 Hz. This tuneable power supply with a μA level current output may contribute to Internet of Things networks requiring numerous sensor nodes at remote places in the environment.

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A novel vibrational energy harvester with electric double layer electrets

Cited by 5 publications

References 5 publications

Recent Advanced Applications of Ionic Liquid for Future Iontronics

Recent Advanced Applications of Ionic Liquid for Future Iontronics

Demonstration of Non‐contact Out‐of‐Plane Vibration Energy Harvesting Using an Electric‐Double‐Layer Electret

Triboelectric energy harvesting with surface-charge-fixed polymer based on ionic liquid

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