Application of piezoelectric electrets to an energy-harvesting system

被引：9

作者：

Tajitsu, Yoshiro ^{[1
]}

Takarada, Jun ^{[1
]}

Hiramoto, Masaki ^{[1
]}

Nakatsuji, Takahiro ^{[1
]}

Nakiri, Takuo ^{[1
]}

Imoto, Kenji ^{[2
]}

Kaimori, Shingo ^{[3
]}

Shikata, Yoshiaki ^{[3
]}

机构：

[1] Kansai Univ, Grad Sch Sci & Engn, Elect Engn Dept, 3-3-35 Yamate, Suita, Osaka 5648680, Japan

[2] Imoto Machinery Co Ltd, 501 Tsukinuke, Kyoto 6028315, Japan

[3] Sumitomo Elect Ind Ltd, Chuo Ku, 4-5-33 Kitahama, Osaka 5410041, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2019年 / 58卷

关键词：

CELLULAR POLYMERS; FERROELECTRETS;

D O I：

10.7567/1347-4065/ab388e

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We developed a prototype system with a simple structure for energy-harvesting as humans walk in their daily life, using piezoelectric electrets as piezoelectric-power-generating elements. We prepared a porous poly(tetrafluoroethylene) (p-PTFE) film with a thickness of 12 mu m and an average pore size of 0.7 mu m sandwiched by two films of tetrafluoroethylene-hexafluoropropylene copolymer (FEP) with a thickness of 6 mu m (FEP/p-PTFE/FEP film) as an electret film used for the energy-harvesting device. A corona discharge system used to fabricate an FEP/p-PTFE/FEP film with an area of 20 x 20 cm(2) that generates piezoelectricity (electret FEP/p-PTFE/FEP film). The electret FEP/p-PTFE/FEP film had a piezoelectric constant d(33) of more than 100 pC/N. Then, we fabricated a multilayer film by stacking the metal foil and the electret FEP/p-PTFE/FEP film without forming wrinkles or streaks. The voltage, current, and power generated by the electret FEP/p-PTFE/FEP multilayer film during an exercise involving a research subject repeatedly stepping on the film placed in the floor were evaluated. The maximum instantaneous generated power was about 4500 mu W each time the subject stamped up and down. The energy consumed in transmitting an 8-byte signal using a Bluetooth Low Energy (BLE) device is known to be about 600 mu W. Considering the electricity consumption of BLE devices, the above result strongly indicates that the power generated by the electret FEP/p-PTFE/FEP multilayer film has great potential for use in BLE devices. (C) 2019 The Japan Society of Applied Physics

引用

页数：5

共 32 条

[1] Crystal structure of the α-form of poly(L-lactide) [J].

Alemán, C ;

Lotz, B ;

Puiggali, J .

MACROMOLECULES, 2001, 34 (14) :4795-4801

[2] Film Sensor Device Fabricated by a Piezoelectric Poly(L-lactic acid) Film [J].

Ando, Masamichi ;

Kawamura, Hideki ;

Kageyama, Keisuke ;

Tajitsu, Yoshiro .

JAPANESE JOURNAL OF APPLIED PHYSICS, 2012, 51 (09)

[3]

[Anonymous], 2002, INTRO POLYM PHYS

[4]

[Anonymous], 1988, Medical Applications of Piezoelectric Polymers

[5]

[Anonymous], 1999, ELECTRETS

[6] Ferroelectrets: Soft electroactive foams for transducers [J].

Bauer, S ;

Gerhard-Multhaupt, R ;

Sessler, GM .

PHYSICS TODAY, 2004, 57 (02) :37-43

[7]

Carpi F., 2016, Electromechanically Active Polymers: A Concise Reference, DOI DOI 10.1007/978-3-319-31530-0

[8]

Carpi F., 2009, Biomedical Applications of Electroactive Polymer Actuators

[9]

Dementyev A, 2013, I C COMP SYST APPLIC

[10]

DiLorenzo ML, 2018, ADV POLYM SCI, V282, P1, DOI 10.1007/978-3-319-75459-8

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