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A highly dense structure boosts energy harvesting and cycling reliabilities of a high-performance lead-free energy harvester

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Abstract

Currently, effective piezoelectric energy harvesters are based on Pb(Zr,Ti)O3 (PZT) ceramics. However, the growing environmental concerns have been pushing the development of viable green alternatives for lead-based piezoelectric ceramics. In this study, a high quality Mn-modified (K0.5Na0.5)NbO3 (Mn-KNN) lead-free piezoelectric ceramic has been prepared, which is promising for use in lead-free piezoelectric energy harvesters. Herein, we showed that the 1.0 mol% Mn-KNN ceramics not only possessed high Curie temperature, but also exhibited excellent energy harvesting performance due to the highly dense fine-grained structure and various domain configurations. In the mode of a cantilever-type energy harvester, a high output power of 85 μW and peak-to-peak voltage of 16 V were obtained at the acceleration of 40 m s−2. Furthermore, the 1.0 mol% Mn-KNN energy harvester exhibits excellent fatigue resistance up to 106 cycles. These findings indicate potential applications of the Mn-KNN piezoelectric energy harvester for self-powered sources of wireless sensor network systems.

Graphical abstract: A highly dense structure boosts energy harvesting and cycling reliabilities of a high-performance lead-free energy harvester

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Publication details

The article was received on 02 Mar 2017, accepted on 13 Jul 2017 and first published on 13 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC00914C
Citation: J. Mater. Chem. C, 2017, Advance Article
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    A highly dense structure boosts energy harvesting and cycling reliabilities of a high-performance lead-free energy harvester

    M. Zheng, Y. Hou, X. Yan, L. Zhang and M. Zhu, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC00914C

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