Premium
A low frequency lead‐free piezoelectric energy harvester with high‐power density
Author(s) -
Yan Xiaodong,
Zheng Mupeng,
Zhu Mankang,
Hou Yudong
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16319
Subject(s) - piezoelectricity , power density , materials science , energy harvesting , power (physics) , vibration , ceramic , cantilever , pmut , acoustics , electrical engineering , composite material , engineering , physics , quantum mechanics
Piezoelectric energy harvesting is an attractive technology for recycling energy from ambient vibrations. Many big challenges still limit applications for the piezoelectric energy harvester, including its low‐power density and high operating frequency. Although many studies have been done on this topic, discussion continues. In this work, a modified piezoelectric cantilever energy harvester (PCEH) fabricated with (Ba 0.85 Ca 0.15 )(Ti 0.9 Zr 0.1 )O 3 ceramic was developed with a low operating frequency (20‐40 Hz) and a high‐power density (1.5‐2.0 μW/mm 3 ). This ceramic presents a novel rhombohedral‐orthorhombic‐tetragonal multiphase coexistence, which is the origination of the enhanced piezoelectric response. A simple method is provided through optimizing the number of proof masses, which can be used to regulate the operating frequency of piezoelectric energy harvester. This discovery will be helpful in developing new piezoelectric energy harvesters with high‐power density and low operating frequency.