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Flexible Piezoelectric Energy Harvester with Ultrahigh Transduction Coefficient by Interconnected Skeleton Design Strategy

Abstract

Based on the strong demand for self-powered wearable electronic devices, flexible piezoelectric energy harvester (FPEH) has recently attracted much attention. Polymer-based piezocomposite is the core of FPEH and its transduction coefficient (d33×g33) is directly related to the material's power generation capacity. Unfortunately, traditional 0-3 type design method generally causes the weak stress transfer and poor dispersion of the filler in the polymer matrix, making it difficult to obtain a high d33·g33. In this work, an unique interconnected skeleton design strategy has been proposed to overcome these shortcomings. By using freeze-casting method, the ice-templated 2-2 type composite material has been constructed with the popular piezoelectric relaxor 0.2Pb(Zn1/3Nb2/3)O3–0.8Pb(Zr1/2Ti1/2)O3 (PZN–PZT) as filler and PDMS as polymer matrix. Both the theoretical simulation and the experimental results revealed the remarkable enhancement in the tress transfer ability and piezoelectric response. In particular, the 2-2 type piezocomposite has a ultrahigh transduction coefficient of 58,213×10-15 m2/N, which is significantly better than previously reported composite materials, and even textured piezoceramics. This work provides a promising paradigm for the development of high-performance FPEH materials.

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Supplementary files

Article information


Submitted
18 Apr 2020
Accepted
20 May 2020
First published
21 May 2020

Nanoscale, 2020, Accepted Manuscript
Article type
Paper

Flexible Piezoelectric Energy Harvester with Ultrahigh Transduction Coefficient by Interconnected Skeleton Design Strategy

Y. Hao, Y. Hou, J. Fu, X. Yu, X. Gao, M. Zheng and M. Zhu, Nanoscale, 2020, Accepted Manuscript , DOI: 10.1039/D0NR03056B

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