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High Performance Flexible Piezocomposites Based on a Particle Alignment Strategy
Author(s) -
Wang Chenwei,
Zheng Mupeng,
Gao Xin,
Fu Jing,
Zhu Mankang,
Hou Yudong
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202000003
Subject(s) - piezoelectricity , dielectrophoresis , polydimethylsiloxane , composite number , voltage , particle (ecology) , energy harvesting , polymer , nanotechnology , chemistry , optoelectronics , composite material , materials science , energy (signal processing) , electrical engineering , microfluidics , oceanography , statistics , mathematics , engineering , geology
Piezocomposites composed of piezoelectric inorganic particles dispersed in a flexible polymer have emerged as promising materials for flexible energy harvesters and sensors. In this work, to overcome the inefficient stress transfer capability in flexible piezocomposites for energy harvester, KNbO 3 (KN) particles prepared by conventional solid oxide process were aligned to form chain‐distributed particles in polydimethylsiloxane (PDMS) matrix by dielectrophoresis. The composite with 8 vol.‐% KN has peak open circuit voltage of 6.3 V and short‐circuit current of 0.82 µA under an applied force of 7 N, which are significantly improved in compared with the sample with piezoelectric particles randomly dispersed. Hugely enhanced stress‐transfer capability of the aligned composite plays a key role in achieving large piezoelectric response. This work provides a promising material candidate for high performance flexible energy harvester.