@article{ac1493577be843579eea09e9f95ff441,
title = "Pb52(Zr,Ti)48O3 ferroelectric dipole electret exploiting surface pillar array structure for electrostatic vibration energy harvesters",
abstract = "In this paper, we present ferroelectric dipole electrets (FDEs) with patterned Pb52(Zr,Ti)48O3 (PZT) pillar arrays. Their output power generation capability was higher than that of flat FDEs when used for electrostatic vibration energy harvesters (e-VEHs). This excellent capability was achieved since the patterned pillar structure increased the electric field near the electret surface. The surface potential (Vs) became as high as 1035 V when the surface charge density was 6.9 mC/m2. This surface charge density was 1.3-fold higher than that of flat FDEs and sixfold higher than that of conventional CYTOP polymer electrets (CPEs). Consequently, VEHs (20 × 20 × 1 mm3) showed a maximum power of 102 µW at an acceleration of 0.6 g (1 g = 9.8 m/s2) and a frequency of 20 Hz. These results will open a new strategy for the use of FDEs in e-VEHs.",
keywords = "Electrets, FDE, Ferroelectric dipole electrets, PZT, Vibration energy harvesters",
author = "Nguyen, {Hung Hoang} and Haruhiko Asanuma and Hiroyuki Oguchi and Gaёl Sebald and Hiroki Kuwano",
note = "Funding Information: This work was supported by the JKA Social Action Program. We would like to thank Dr. LE VAN MINH of New Industry Creation Hatchery Center (NICHe), Tohoku University, for his supports in establishing the fabrication technique of patterned FDEs. Funding Information: Hoang Hung Nguyen received his B.Sc. and M.Sc. degrees from Hanoi University of Science and Technology, Vietnam, in 2010 and 2012, respectively. He obtained his Ph.D. degree from Tohoku University, Japan, in 2018. From 2018 to 2019, he was a postdoctoral fellow at Tohoku University, Japan. Since 2019, he has been a researcher in Sendai Smart Machine Co., Ltd. His research interests are in MEMS and sensors. (hung@nanosys.mech.tohoku.ac.jp) Haruhiko Asanuma received his B.Sc. and M.Sc. degrees in physics from the Faculty of Science and the Graduate School of Science, Tohoku University, Japan, in 2005 and 2007, respectively. After five years of service in industry, he joined the Graduate School of Engineering, Tohoku University, and received his Ph.D. degree in 2015. He is currently an assistant professor at Kanazawa University, Japan. His research interests include applied material physics, VEHs, and semiactive vibration control. (h-asanuma@se.kanazawa-u.ac.jp) Hiroyuki Oguchi was born in Shiga Prefecture, Japan in 1975. He obtained his M.Eng. degree from Tokyo University (2002) and his Ph.D. degree from University of Maryland (2008). He was an assistant professor (2008–2012) and has been an associate professor (2012–2020) at Tohoku University. He has worked on growth of films with energy-related functions and their application to energy devices. One representative recent work is the growth of hydride films with fast Li-ion conduction, which will be applied to Li-ion batteries in the future. Another representative work is the growth of AlN-based films and their application to high-power generation VEHs. (oguchi@nanosys.mech.tohoku.ac.jp) Gaёl Sebald received his M.Sc. degree in electrical engineering and his Ph.D. degree in acoustics from INSA Lyon, France, in 2001 and 2004, respectively. He then received a Japan Society for Promotion of Science (JSPS) fellowship for a postdoctoral position at Tohoku University (Sendai, Japan). He became an associate professor in 2005 at INSA Lyon, and a professor in 2016. In 2010, he was a JSPS Invited Researcher in the Department of Nanomechanics at Tohoku University. Since 2016, he has been based in an International Joint Lab between France and Japan at Tohoku University. His research interests are mainly in the understanding of multiphysics coupling in materials, and their application to low-power energy harvesting from temperature and vibration, as well as electrocaloric and electrocaloric cooling materials and applications. He is also working on nonlinear dynamics applied to energy harvesting, ferroelectric/ferromagnetic modeling, and fractional calculus applied to hysteresis dynamics and electromagnetic nondestructive testing. (gael.sebald@insa-lyon.fr) Hiroki Kuwano received his B.Eng. and M.Eng. degrees in mechanical engineering, and his Ph.D. degree in electrical engineering from Tohoku University, Sendai, Japan, in 1975, 1977, and 1990, respectively. He was a member of the Electrical Communication Laboratories of Nippon Telephone and Telegraph Public Corporation. Since 2003, he has been a professor at Tohoku University. He has authored or co-authored over 120 technical papers and books, and over 50 patents in microelectromechanical systems and particle beam processing. His research interests are in nanoenergy systems, including energy harvesting systems and sensor networks, particularly those used for safety and medical applications. (hiroki.kuwano@nanosys.mech.tohoku.ac.jp) Publisher Copyright: {\textcopyright} MYU K.K.",
year = "2020",
month = jul,
doi = "10.18494/SAM.2020.2854",
language = "English",
volume = "32",
pages = "2517--2525",
journal = "Sensors and Materials",
issn = "0914-4935",
publisher = "M Y U Scientific Publishing Division",
number = "7",
}