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Targeted doping builds a high energy density composite piezoceramics for energy harvesting
Author(s) -
Yu Xiaole,
Hou Yudong,
Zheng Mupeng,
Yan Jing,
Jia Wenxu,
Zhu Mankang
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.15896
Subject(s) - materials science , power density , doping , piezoelectricity , composite number , energy harvesting , perovskite (structure) , cantilever , diode , optoelectronics , light emitting diode , ion , composite material , nanotechnology , chemical engineering , power (physics) , chemistry , physics , quantum mechanics , engineering , organic chemistry
To build piezoceramics with high transduction coefficient ( d 33 × g 33 ) is the key to improve the power generation capability of piezoelectric energy harvester. Here, a new targeted doping strategy has been proposed to significantly increase the energy density of piezoceramics. Taking the modification of 0.2Pb(Zn 1/3 Nb 2/3 )O 3 ‐0.8Pb(Zr 0.5 Ti 0.5 )O 3 (PZN‐PZT) as an example, dual functions can be achieved by introducing appropriate amount of target‐doped (Zn 0.1 Ni 0.9 )TiO 3 (ZTN9) based on its pyrolysis characteristics. On the one hand, Ni 2+ ions enter the perovskite matrix to replace Zn 2+ ions to form equivalent doping; on the other hand, it induces the formation of 0‐3 ZnO/perovskite composite structure, and both of which promote the large increase in d 33 × g 33 due to the changes in the domain configuration are more conducive to the ferro‐/piezoelectricity. In all compositions, 0.67 mol% ZTN9 added specimen has a maximum value (12 433 × 10 −15 m 2 /N) of the d 33 × g 33 . The cantilever piezoelectric energy harvester fabricated with this material generates up to 4.50 μW/mm 3 of power density at 1 g acceleration, which is capable of quickly charging a 47 μF electrolytic capacitor and then lit 135 parallel‐connected commercial blue light‐emitting diodes (LEDs), showing its important application in implementing self‐powered microsensors.