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Flexible pillar-base structured piezocomposite with aligned porosity for piezoelectric energy harvesting
Mingyang Yan1; Junwen Zhong2; Shengwen Liu1; Zhida Xiao1; Xi Yuan3; Di Zhai1; Kechao Zhou1; Zhaoyang Li2; Dou Zhang1; Chris Bowen4; Yan Zhang1
2021-10
Source PublicationNano Energy
ISSN2211-2855
Volume88Issue:1Pages:106278
Abstract

Flexible piezoelectric energy harvesters have attracted significant attention in recent years due to their ability to convert strain energy associated with bending into electrical energy for low-power wearable electronic devices. Compared with 0–3 type piezoelectric composites, where the piezoelectric phase is isolated within the material, flexible piezoelectric energy harvesters based on a three-dimensional interconnected ceramic skeleton are of particular interest due to their high stress transfer capability and high piezoelectric coefficients. Herein, a three-dimensional interconnected porous barium calcium zirconate titanate (BCZT) pillar-based structure is created via freeze casting, where polydimethylsiloxane (PDMS) is impregnated into the aligned pore channels to form a flexible piezoelectric energy harvester. The effect of porosity on piezoelectric coefficients, ferroelectric properties and energy harvesting performance is investigated in detail. The piezoelectric coefficient and energy harvesting figure of merit are significantly enhanced due to the presence of an aligned pore structure which leads to a high transfer of applied stress into the piezoelectric phase. The highly aligned porosity leads to the creation of a piezoelectric composite with 60 vol% of polymer that exhibits a high output voltage of 30.2 V and current of 13.8 μA. Moreover, the peak power density can reach up to 96.2 μW cm−2, which is significantly higher than that of nanoparticle-based piezoelectric composites. This work demonstrates a promising prospect of utilizing flexible piezoelectric composites for energy harvesting applications.

DOI2211-2855
URLView the original
Indexed BySCIE
Language英語English
PublisherElsevier
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Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Affiliation1.State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
2.Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics, University of Macau, Macao SAR 999078, China
3.College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
4.Department of Mechanical Engineering, University of Bath, Bath BA27AY, UK
Recommended Citation
GB/T 7714
Mingyang Yan,Junwen Zhong,Shengwen Liu,et al. Flexible pillar-base structured piezocomposite with aligned porosity for piezoelectric energy harvesting[J]. Nano Energy,2021,88(1):106278.
APA Mingyang Yan,Junwen Zhong,Shengwen Liu,Zhida Xiao,Xi Yuan,Di Zhai,Kechao Zhou,Zhaoyang Li,Dou Zhang,Chris Bowen,&Yan Zhang.(2021).Flexible pillar-base structured piezocomposite with aligned porosity for piezoelectric energy harvesting.Nano Energy,88(1),106278.
MLA Mingyang Yan,et al."Flexible pillar-base structured piezocomposite with aligned porosity for piezoelectric energy harvesting".Nano Energy 88.1(2021):106278.
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